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Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Oct. 29, 2016	Nov. 28, 2016
Entity Information [Line Items]
Entity Registrant Name	DAKTRONICS INC /SD/
Entity Central Index Key	0000915779
Current Fiscal Year End Date	--04-29
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		44,029,469
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q2
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 29, 2016

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 29, 2016	Apr. 30, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 34,045	$ 28,328
Restricted cash	205	198
Marketable securities	17,904	24,672
Accounts receivable, net	90,421	77,554
Inventories, net	63,632	69,827
Costs and estimated earnings in excess of billings	43,354	30,200
Current maturities of long-term receivables	3,068	3,172
Prepaid expenses and other assets	7,533	6,468
Income tax receivables	229	4,812
Total current assets	260,391	245,231
Long-term receivables, less current maturities	3,202	3,866
Goodwill	7,712	8,116
Intangibles, net	5,718	7,721
Investment in affiliates and other assets	2,136	2,414
Deferred income taxes	9,412	9,437
Total noncurrent assets	28,180	31,554
PROPERTY AND EQUIPMENT:
Land	2,100	2,155
Buildings	65,039	65,247
Machinery and equipment	83,206	82,973
Office furniture and equipment	5,570	14,746
Computer software and hardware	49,894	48,917
Equipment held for rental	374	374
Demonstration equipment	7,714	8,026
Transportation equipment	6,912	6,596
Property and equipment, gross	220,809	229,034
Less accumulated depreciation	151,671	155,871
Property and equipment, net	69,138	73,163
TOTAL ASSETS	357,709	349,948
CURRENT LIABILITIES:
Accounts payable	44,796	43,441
Accrued expenses	25,270	23,532
Warranty obligations	15,110	16,564
Billings in excess of costs and estimated earnings	8,338	10,361
Customer deposits (billed or collected)	14,020	16,012
Deferred revenue (billed or collected)	12,514	10,712
Current portion of other long-term obligations	442	585
Income taxes payable	2,385	310
Total current liabilities	122,875	121,517
Long-term warranty obligations	14,740	13,932
Long-term deferred revenue (billed or collected)	5,504	5,603
Other long-term obligations, less current maturities	4,451	4,059
Long-term income tax payable	3,184	3,016
Deferred income taxes	708	754
Total long-term liabilities	28,587	27,364
TOTAL LIABILITIES	151,462	148,881
SHAREHOLDERS' EQUITY:
Common Stock, no par value, authorized 120,000,000 shares; 44,214,750 and 43,998,635 shares issued and outstanding at October 29, 2016 and April 30, 2016, respectively	51,449	51,347
Additional paid-in capital	36,622	35,351
Retained earnings	124,353	117,276
Treasury Stock, at cost, 303,957 and 19,680 shares at October 29, 2016 and April 30, 2016, respectively	(1,834)	(9)
Accumulated other comprehensive loss	(4,343)	(2,898)
TOTAL SHAREHOLDERS' EQUITY	206,247	201,067
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 357,709	$ 349,948

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Oct. 29, 2016	Apr. 30, 2016
SHAREHOLDERS' EQUITY:
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	120,000,000	120,000,000
Common stock, issued (in shares)	44,214,750	43,998,635
Treasury stock, at cost (in shares)	303,957	19,680

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Income Statement [Abstract]
Net sales	$ 169,992	$ 157,668	$ 327,138	$ 307,889
Cost of goods sold	125,684	122,155	243,763	236,875
Gross profit	44,308	35,513	83,375	71,014
Operating expenses:
Selling expense	15,891	14,825	31,150	29,089
General and administrative	8,625	8,116	17,408	16,286
Product design and development	7,126	6,975	14,169	13,943
Total operating expenses	31,642	29,916	62,727	59,318
Operating income	12,666	5,597	20,648	11,696
Nonoperating income (expense):
Interest income	171	266	376	564
Interest expense	(76)	(28)	(118)	(90)
Other income (expense), net	149	(231)	55	(674)
Income before income taxes	12,910	5,604	20,961	11,496
Income tax expense	3,889	2,436	6,401	4,552
Net income	$ 9,021	$ 3,168	$ 14,560	$ 6,944
Weighted average shares outstanding:
Basic (in shares)	43,988	43,934	44,051	43,890
Diluted (in shares)	44,098	44,113	44,168	44,255
Earnings per share:
Basic (in dollars per share)	$ 0.21	$ 0.07	$ 0.33	$ 0.16
Diluted (in dollars per share)	0.20	0.07	0.33	0.16
Cash dividend declared per share (in dollars per share)	$ 0.07	$ 0.10	$ 0.17	$ 0.20

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 9,021	$ 3,168	$ 14,560	$ 6,944
Other comprehensive loss:
Cumulative translation adjustments	(509)	(202)	(1,440)	(760)
Unrealized loss on available-for-sale securities, net of tax	(2)	(18)	(4)	(3)
Total other comprehensive loss, net of tax	(511)	(220)	(1,444)	(763)
Comprehensive income	$ 8,510	$ 2,948	$ 13,116	$ 6,181

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 14,560	$ 6,944
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	9,242	8,314
Impairment loss of intangible assets	830	0
Loss (gain) on sale of property, equipment and other assets	33	(50)
Share-based compensation	1,484	1,503
Provision for doubtful accounts	962	209
Deferred income taxes, net	(48)	573
Change in operating assets and liabilities	(12,057)	(26,487)
Net cash provided by (used in) operating activities	15,006	(8,994)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(4,625)	(10,491)
Proceeds from sale of property, equipment and other assets	72	105
Purchases of marketable securities	(4,583)	(13,780)
Proceeds from sales or maturities of marketable securities	11,328	14,133
Acquisitions, net of cash acquired	(562)	(1,936)
Net cash provided by (used in) investing activities	1,630	(11,969)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on notes payable	(6)	(27)
Proceeds from exercise of stock options	102	610
Principal payments on long-term obligations	(904)	(16)
Dividends paid	(7,482)	(8,760)
Payments for common shares repurchased	(1,825)	0
Tax payments related to RSU issuances	(213)	(227)
Net cash used in financing activities	(10,328)	(8,420)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(591)	(441)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	5,717	(29,824)
CASH AND CASH EQUIVALENTS:
Beginning of period	28,328	57,284
End of period	34,045	27,460
Cash payments for:
Interest	153	175
Income taxes, net of refunds	1,170	5,178
Supplemental schedule of non-cash investing and financing activities:
Demonstration equipment transferred to inventory	218	192
Purchase of property and equipment included in accounts payable	$ 295	$ 364

Basis of Presentation and Summary of Critical Accounting Policies	6 Months Ended
	Oct. 29, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Critical Accounting Policies	Note 1. Basis of Presentation and Summary of Critical Accounting Policies In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to fairly present our financial position, results of operations and cash flows for the periods presented. The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("GAAP") requires management to make estimates and assumptions affecting the reported amounts therein. Due to the inherent uncertainty involved in making estimates, actual results in future periods may differ from those estimates. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. The balance sheet at April 30, 2016 has been derived from the audited financial statements at that date, but it does not include all of the information and footnotes required by GAAP for complete financial statements. These financial statements should be read in conjunction with our financial statements and notes thereto for the year ended April 30, 2016, which are contained in our Annual Report on Form 10-K previously filed with the Securities and Exchange Commission. The results of operations for the interim periods presented are not necessarily indicative of results that may be expected for any other interim period or for the full fiscal year. Daktronics, Inc. operates on a 52 to 53 week fiscal year, with our fiscal year ending on the Saturday closest to April 30 of each year. When April 30 falls on a Wednesday, the fiscal year ends on the preceding Saturday. Within each fiscal year, each quarter is comprised of 13 week periods following the beginning of each fiscal year. In each 53 week year, an additional week is added to the first quarter and each of the last three quarters is comprised of a 13 week period. An immaterial reclassification has been made to conform fiscal 2016 to the fiscal 2017 classifications of the statements of cash flows for comparative purposes due to retrospectively adopting Accounting Standards Update ("ASU") 2016-09, Compensation-Stock Compensation (Topic 718), Improvements to Employee Share-Based Payment Accounting in the first quarter of fiscal 2017. Investments in affiliates over which we do not have the ability to exert significant influence over the investee's operating and financing activities are accounted for under the cost method of accounting. We have evaluated our relationships with affiliates and have determined that these entities are not variable interest entities. The aggregate amount of investments accounted for under the cost method was $1,211 at October 29, 2016 and April 30, 2016. There have not been any identified events or changes in circumstances that may have a significant adverse effect on their fair value and it is not practical to estimate their fair value. Recent Accounting Pronouncements Accounting Standards Adopted In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-09, which is intended to simplify certain aspects of the accounting for share-based payment award transactions, including income tax effects when awards vest or settle, repurchase of employees’ shares to satisfy statutory tax withholding obligations, an option to account for forfeitures as they occur, and classification of certain amounts on the statements of cash flows. ASU 2016-09 is effective for annual and interim reporting periods beginning after December 15, 2016. Early adoption is permitted, and we adopted it during the first quarter of fiscal 2017. We have elected to continue to estimate forfeitures expected to occur to determine the amount of compensation cost to be recognized in each period. Provisions related to income taxes have been adopted prospectively. Provisions related to the statements of cash flows have been adopted retrospectively but did not have a material impact on our statements of cash flows. In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory, which changes the measurement principle of inventory from the lower of cost or market to the lower of cost and net realizable value. The guidance will require prospective application at the beginning of our first quarter of fiscal 2018, but it permits adoption in an earlier period. ASU 2015-11 was adopted by the Company effective May 1, 2016 and did not have a material impact on our consolidated results of operations, cash flows, and financial position. In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40) Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. This ASU clarifies existing GAAP guidance about a customer’s accounting for fees paid in a cloud computing arrangement ("CCA") with or without a software license. Examples of cloud computing arrangements include software as a service, platform as a service, infrastructure as a service, and other similar hosting arrangements. Under ASU 2015-05, fees paid by a customer in a CCA for a software license are within the scope of the internal-use software guidance if certain criteria are met. If the criteria are not met, the fees paid are accounted for as a prepaid service contract and expensed. We have historically accounted for all fees in a CCA as a prepaid service contract. We adopted ASU 2015-05 in the first quarter of fiscal 2017 when it became effective, using the prospective method. We did not pay any fees in a CCA in the current period that met the criteria to be in the scope of the internal-use software guidance, and ASU 2015-05 had no impact on our consolidated results of operations, cash flows, and financial position. New Accounting Standards Not Yet Adopted In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740) Intra-Entity Transfers of Assets Other than Inventory, which is intended to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current U.S. GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party, which is an exception to the principle of comprehensive recognition of current and deferred income taxes in U.S. GAAP. This update eliminates the exception by requiring entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The new guidance is effective for interim and annual periods beginning after December 15, 2017, with early adoption permitted. We are currently evaluating the effect that adopting ASU 2016-16 will have on our consolidated financial statements and related disclosures. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments, which will make eight targeted changes to how cash receipts and cash payments are presented and classified in the statements of cash flows. ASU 2016-15 is effective for interim and annual periods beginning after December 15, 2017, and will require adoption on a retrospective basis unless it is impracticable to apply, in which case we would be required to apply the amendments prospectively as of the earliest date practicable. We are currently evaluating the effect that adopting this new accounting guidance will have on our consolidated cash flows and related disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (that is, lessees and lessors). ASU 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The new guidance is effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the effect that adopting this new accounting guidance will have on our consolidated results of operations, cash flows, and financial position. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 is a comprehensive revenue recognition model that requires a company to recognize revenue from the transfer of goods or services to customers in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. The FASB has also issued ASUs 2016-08, 2016-10, and 2016-12 to clarify guidance with respect to principal versus agent considerations, the identification of performance obligations and licensing and certain narrow areas and adds practical expedients. ASU 2014-09 is effective for fiscal years and interim periods beginning after December 15, 2017 (as stated in ASU 2015-14, which was issued in August 2015 and defers the effective date), and is now effective for the Company's fiscal 2019. We are evaluating the effect that adopting ASU 2014-09, as clarified, will have on our consolidated results of operations, cash flows, financial position, and related disclosures.

Earnings Per Share EPS

6 Months Ended

Oct. 29, 2016

Earnings Per Share [Abstract]

Earnings Per Share EPS

Note 2. Earnings Per Share ("EPS")

Basic EPS is computed by dividing income attributable to common shareholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution which may occur if securities or other obligations to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock which share in our earnings.

The following is a reconciliation of the income and common share amounts used in the calculation of basic and diluted EPS for the three and six months ended October 29, 2016 and October 31, 2015:



	Net income		Shares	Per share income
For the three months ended October 29, 2016
Basic earnings per share	$	9,021	43,988	$	0.21
Dilution associated with stock compensation plans	—		110	(0.01		)
Diluted earnings per share	$	9,021	44,098	$	0.20
For the three months ended October 31, 2015
Basic earnings per share	$	3,168	43,934	$	0.07
Dilution associated with stock compensation plans	—		179	—
Diluted earnings per share	$	3,168	44,113	$	0.07
For the six months ended October 29, 2016
Basic earnings per share	$	14,560	44,051	$	0.33
Dilution associated with stock compensation plans	—		117	—
Diluted earnings per share	$	14,560	44,168	$	0.33
For the six months ended October 31, 2015
Basic earnings per share	$	6,944	43,890	$	0.16
Dilution associated with stock compensation plans	—		365	—
Diluted earnings per share	$	6,944	44,255	$	0.16

Options outstanding to purchase 2,162 shares of common stock with a weighted average exercise price of $14.56 for the three months ended October 29, 2016 and 2,173 shares of common stock with a weighted average exercise price of $15.13 for the three months ended October 31, 2015 were not included in the computation of diluted earnings per share because the effects would be anti-dilutive.

Options outstanding to purchase 2,655 shares of common stock with a weighted average exercise price of $13.41 for the six months ended October 29, 2016 and 1,378 shares of common stock with a weighted average exercise price of $18.61 for the six months ended October 31, 2015 were not included in the computation of diluted earnings per share because the effects would be anti-dilutive.

Share Repurchase Program (Notes)	6 Months Ended
Share Repurchase Program (Notes)	Oct. 29, 2016
Share Repurchase Program [Abstract]
Treasury Stock [Text Block]	Note 3. Share Repurchase Program On June 17, 2016, our Board of Directors approved a stock repurchase program under which Daktronics, Inc. may purchase up to $40,000 of its outstanding shares of common stock. Under this program, we may repurchase shares from time to time in open market transactions and in privately negotiated transactions based on business, market, applicable legal requirements and other considerations. The repurchase program does not require the repurchase of a specific number of shares and may be terminated at any time. During the first quarter of fiscal 2017, we repurchased 284 shares of common stock at a total cost of $1,825, and there have been no other purchases during the second quarter of fiscal 2017. We may repurchase up to an additional $38,175 of common stock under the current Board authorization.

Segment Disclosure

6 Months Ended

Oct. 29, 2016

Segment Reporting [Abstract]

Segment Disclosure

Note 4. Segment Disclosure

We have organized our business into five segments which meet the definition of reportable segments under Accounting Standards Codification ("ASC") 280-10, Segment Reporting: Commercial, Live Events, High School Park and Recreation, Transportation, and International. These segments are based on the type of customer or geography and are the same as our business units.

Our Commercial business unit primarily consists of sales of our video display systems, digital billboards, and Galaxy^® and Fuelight^™ product lines to resellers (primarily sign companies), Out-of-Home ("OOH") companies, national retailers, quick-serve restaurants, casinos and petroleum retailers. Our Live Events business unit primarily consists of sales of integrated scoring and video display systems to college and professional sports facilities and convention centers and sales of our mobile display technology to video rental organizations and other live events type venues. Our High School Park and Recreation business unit primarily consists of sales of scoring systems, Galaxy^® displays and video display systems to primary and secondary education facilities. Our Transportation business unit primarily consists of sales of our Vanguard^® and Galaxy^® product lines to governmental transportation departments, airlines and other transportation related customers. Our International business unit consists of sales of all product lines outside the United States and Canada. In our International business unit, we focus on product lines related to integrated scoring and video display systems for sports and commercial applications, OOH advertising products, and European transportation related products.

Our segment reporting presents results through contribution margin, which is comprised of gross profit less selling costs. Segment profit excludes general and administration expense, product development expense, interest income and expense, non-operating income and income tax expense. Assets are not allocated to the segments. Depreciation and amortization are allocated to each segment based on various financial measures; however, some depreciation and amortization are corporate in nature and remain unallocated. In general, our segments follow the same accounting policies as those described in Note 1 of our Annual Report on Form 10-K for the fiscal year ended April 30, 2016. Unabsorbed costs of domestic field sales and services infrastructure, including most field administrative staff, are allocated to the Commercial, Live Events, High School Park and Recreation, and Transportation business units based on cost of sales. Shared manufacturing, buildings and utilities, and procurement costs are allocated based on payroll dollars, square footage and various other financial measures.

We do not maintain information on sales by products; therefore, disclosure of such information is not practical.

The following table sets forth certain financial information for each of our five operating segments for the periods indicated:



	Three Months Ended						Six Months Ended
	October 29, 2016			October 31, 2015			October 29, 2016			October 31, 2015
Net sales:
Commercial	$	39,923		$	40,066		$	76,177		$	83,276
Live Events	55,363			50,761			115,996			98,683
High School Park and Recreation	28,707			24,253			56,324			43,212
Transportation	16,101			13,294			30,387			27,061
International	29,898			29,294			48,254			55,657
	169,992			157,668			327,138			307,889

Contribution margin:
Commercial	5,837			3,993			10,333			10,106
Live Events	8,658			6,802			17,533			12,985
High School Park and Recreation	6,750			3,785			13,749			7,560
Transportation	4,531			3,183			8,132			6,363
International	2,641			2,925			2,478			4,911
	28,417			20,688			52,225			41,925

Non-allocated operating expenses:
General and administrative	8,625			8,116			17,408			16,286
Product design and development	7,126			6,975			14,169			13,943
Operating income	12,666			5,597			20,648			11,696

Nonoperating income (expense):
Interest income	171			266			376			564
Interest expense	(76		)	(28		)	(118		)	(90		)
Other income (expense), net	149			(231		)	55			(674		)

Income before income taxes	12,910			5,604			20,961			11,496
Income tax expense	3,889			2,436			6,401			4,552
Net income	$	9,021		$	3,168		$	14,560		$	6,944

Depreciation, amortization, and impairment:
Commercial	$	1,594		$	1,134		$	3,161		$	2,391
Live Events	1,273			1,097			2,553			2,418
High School Park and Recreation	451			368			889			858
Transportation	324			339			646			668
International	1,162			342			1,491			598
Unallocated corporate depreciation	668			946			1,332			1,381
	$	5,472		$	4,226		$	10,072		$	8,314

No single geographic area comprises a material amount of our net sales or property and equipment, net of accumulated depreciation, other than the United States. The following table presents information about net sales and property and equipment, net of accumulated depreciation, in the United States and elsewhere:



	Three Months Ended				Six Months Ended
	October 29, 2016		October 31, 2015		October 29, 2016		October 31, 2015
Net sales:
United States	$	134,574	$	126,211	$	269,592	$	246,078
Outside U.S.	35,418		31,457		57,546		61,811
	$	169,992	$	157,668	$	327,138	$	307,889


	October 29, 2016		April 30, 2016
Property and equipment, net of accumulated depreciation:
United States	$	64,620	$	68,233
Outside U.S.	4,518		4,930
	$	69,138	$	73,163

We have numerous customers worldwide for sales of our products and services; therefore, we are not economically dependent on a limited number of customers for the sale of our products and services except with respect to our dependence on two major digital billboard customers in our Commercial business unit.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8971-108599

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-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
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+ Details

Marketable Securities

6 Months Ended

Oct. 29, 2016

Marketable Securities [Abstract]

Marketable Securities

Note 5. Marketable Securities

We have a cash management program which provides for the investment of cash balances not used in current operations. We classify our investments in marketable securities as available-for-sale in accordance with the provisions of ASC 320, Investments – Debt and Equity Securities. Marketable securities classified as available-for-sale are reported at fair value with unrealized gains or losses, net of tax, reported in accumulated other comprehensive loss. As it relates to fixed income marketable securities, it is not likely we will be required to sell any of these investments before recovery of the entire amortized cost basis. In addition, as of October 29, 2016, we anticipate we will recover the entire amortized cost basis of such fixed income securities, and we have determined no other-than-temporary impairments associated with credit losses were required to be recognized. The cost of securities sold is based on the specific identification method. Where quoted market prices are not available, we use the market price of similar types of securities traded in the market to estimate fair value.

As of October 29, 2016 and April 30, 2016, our available-for-sale securities consisted of the following:



	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Balance as of October 29, 2016
Certificates of deposit	$	13,804	$	—	$	—		$	13,804
U.S. Government securities	401		—		—			401
U.S. Government sponsored entities	2,201		—		(2		)	2,199
Municipal obligations	1,500		—		—			1,500
	$	17,906	$	—	$	(2	)	$	17,904
Balance as of April 30, 2016
Certificates of deposit	$	14,927	$	—	$	—		$	14,927
U.S. Government sponsored entities	8,523		—		(1		)	8,522
Municipal obligations	1,221		2		—			1,223
	$	24,671	$	2	$	(1	)	$	24,672

Realized gains or losses on investments are recorded in our consolidated statements of operations as other income (expense), net. Upon the sale of a security classified as available-for-sale, the security’s specific unrealized gain (loss) is reclassified out of "accumulated other comprehensive loss” into earnings based on the specific identification method. In the six months ended October 29, 2016 and October 31, 2015, the reclassifications from accumulated other comprehensive loss to earnings were immaterial.

All available-for-sale securities are classified as current assets, as they are readily available to support our current operating needs. The contractual maturities of available-for-sale debt securities as of October 29, 2016 were as follows:



	Less than 12 months		1-5 Years		Total
Certificates of deposit	$	7,113	$	6,691	$	13,804
U.S. Government securities	401		—		401
U.S. Government sponsored agencies	800		1,398		2,198
Municipal obligations	1,205		296		1,501
	$	9,519	$	8,385	$	17,904

- Definition

The entire disclosure for investments in certain debt and equity securities.

+ References + Details

Business Combination	6 Months Ended
Business Combination	Oct. 29, 2016
Business Combinations [Abstract]
Business Combination	Note 6. Business Combinations Data Display Acquisition We acquired 100 percent ownership in Data Display, a European transportation display company, on August 11, 2014 for an undisclosed amount. The results of its operations have been included in our consolidated financial statements since the date of acquisition. We have not made pro forma disclosures because the results of its operations are not material to our consolidated financial statements. Data Display is a European based company focused on the design and manufacture of transportation displays. This acquisition allows our organization to better service transportation customers world-wide and broaden our leadership position on a global scale. This acquisition included a manufacturing plant in Ireland to manufacture transportation displays. This acquisition was funded with cash on hand. During the first quarter of fiscal 2016, the purchase price allocation for the Data Display acquisition was completed and the fair values of the consideration paid and contingent consideration were finalized. The excess of the purchase price over the net tangible and intangible assets was recorded as goodwill of $1,463 which primarily related to the value of an assembled workforce and is not deductible for tax purposes. Included in the purchase price allocation were acquired identifiable intangibles valued at $480 representing trademarks and technology with a useful life of 20 years and customer relationships valued at $84 with a useful life of 18 years. Also included in the purchase was $1,433 of property and equipment, $437 of investment in affiliates, $2,624 of inventory, $3,063 of accounts receivable, and $1,892 of other current assets, which was offset by current operating liabilities of $3,695 and long term obligations of $950. ADFLOW Acquisition We acquired 100 percent ownership in ADFLOW Networks, Inc. ("ADFLOW"), a Canadian company, on March 15, 2016 for an undisclosed amount. The results of its operations have been included in our consolidated financial statements since the date of acquisition. We have not made pro forma disclosures because the results of its operations are not material to our consolidated financial statements. ADFLOW is a Canadian based company focused on digital media solutions. This acquisition will allow our organization to grow and strengthen our solution offering in Digital Media Networks (DMN). We believe this will broaden our value proposition for our customers and deliver new offerings to the market. This acquisition was funded with cash on hand. During the fourth quarter of fiscal 2016, we prepared the preliminary fair value measurements of assets acquired and liabilities assumed as of the acquisition date using independent appraisals and other analysis. We are in the process of determining final working capital adjustments. The excess of the purchase price over the estimated net tangible and intangible assets was recorded as goodwill of $2,399 which primarily related to the value of an assembled workforce and is not deductible for tax purposes. Included in the preliminary purchase price allocation were acquired identifiable intangibles valued at $3,176 representing software and trademarks and customer relationships valued at $2,692. Based on the preliminary fair value measurements, also included in the purchase price was $58 of property and equipment, $230 of inventory, $1,283 of accounts receivable, and $616 of other current assets, which was offset by current operating liabilities of $935 and long term obligations of $1,545. The purchase price includes deferred payments of $1,833 to be made over three years unless certain conditions in the business are not met. We have included the payment obligation in other long-term obligations in our consolidated balance sheet. ADFLOW contributed net sales of $4,882 during the six months ended October 29, 2016. General and administrative expenses were immaterial in the six months ended October 29, 2016 for professional fees relating to the acquisition.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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-Name Accounting Standards Codification
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+ Details

Goodwill

6 Months Ended

Oct. 29, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Note 7. Goodwill

The changes in the carrying amount of goodwill related to each reportable segment for the six months ended October 29, 2016 were as follows:



	Live Events			Commercial			Transportation			International			Total
Balance as of April 30, 2016	$	2,304		$	3,350		$	75		$	2,387		$	8,116
Acquisition, net of cash required	—			(103		)	—			—			(103		)
Foreign currency translation	(24		)	(163		)	(24		)	(90		)	(301		)
Balance as of October 29, 2016	$	2,280		$	3,084		$	51		$	2,297		$	7,712

We perform an analysis of goodwill on an annual basis, and it is tested for impairment more frequently if events or changes in circumstances indicate that an asset might be impaired. We performed our annual analysis based on the goodwill amount as of the first business day of our third quarter in fiscal 2016, which was November 1, 2015. The result of the analysis indicated no goodwill impairment existed as of that date. During the fourth quarter of fiscal 2016, we performed an interim goodwill impairment analysis due to economic conditions causing slowing orders. The results of our analysis indicated no goodwill impairment was necessary. We are currently in the process of completing this annual analysis based on the goodwill amount as of the first business day of our third quarter of fiscal 2017.

Inventories

6 Months Ended

Oct. 29, 2016

Inventory Disclosure [Abstract]

Inventories

Note 8. Inventories

Inventories consisted of the following:



	October 29, 2016		April 30, 2016
Raw materials	$	25,211	$	28,184
Work-in-process	7,253		6,158
Finished goods	31,168		35,485
	$	63,632	$	69,827

Receivables	6 Months Ended
Receivables	Oct. 29, 2016
Receivables [Abstract]
Receivables	Note 9. Receivables Accounts receivable are reported net of an allowance for doubtful accounts of $2,692 and $2,797 at October 29, 2016 and April 30, 2016, respectively. Included in accounts receivable as of October 29, 2016 and April 30, 2016 was $1,376 and $437, respectively, of retainage on construction-type contracts, all of which is expected to be collected within one year. In connection with certain sales transactions, we have entered into sales contracts with installment payments exceeding six months and sales-type leases. The present value of these contracts and leases is recorded as a receivable as the revenue is recognized in accordance with U.S. GAAP, and profit is recognized to the extent the present value is in excess of cost. We generally retain a security interest in the equipment or in the cash flow generated by the equipment until the contract is paid. The present value of long-term contracts and lease receivables, including accrued interest and current maturities, was $6,270 and $7,038 as of October 29, 2016 and April 30, 2016, respectively. Contract and lease receivables bearing annual interest rates ranging from 4.8 to 10.0 percent are due in varying annual installments through August 2024. The face amount of long-term receivables was $7,095 and $7,236 as of October 29, 2016 and April 30, 2016, respectively.

Commitments and Contingencies

6 Months Ended

Oct. 29, 2016

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Note 10. Commitments and Contingencies

Litigation: We are a party to legal proceedings and claims which arise during the ordinary course of business. We review our legal proceedings and claims, regulatory reviews and inspections, and other legal matters on an ongoing basis and follow appropriate accounting guidance when making accrual and disclosure decisions. We establish accruals for those contingencies when the incurrence of a loss is probable and can be reasonably estimated, and we disclose the amount accrued and the amount of a reasonably possible loss in excess of the amount accrued, if such disclosure is necessary for our financial statements to not be misleading. We do not record an accrual when the likelihood of loss being incurred is probable, but the amount cannot be reasonably estimated, or when the loss is believed to be only reasonably possible or remote, although disclosures will be made for material matters as required by ASC 450-20, Contingencies - Loss Contingencies. Our assessment of whether a loss is reasonably possible or probable is based on our assessment and consultation with legal counsel regarding the ultimate outcome of the matter following all appeals.

As of October 29, 2016 and April 30, 2016, we did not believe there was a reasonable probability any material loss for these various claims or legal actions, including reviews, inspections or other legal proceedings, if any, would be incurred. Accordingly, no accrual or disclosure of a potential range of loss has been made related to these matters. In the opinion of management, the ultimate liability of all unresolved legal proceedings is not expected to have a material effect on our financial position, liquidity or capital resources.

Warranties: We offer a standard parts coverage warranty for periods varying from one to five years for most of our products. We also offer additional types of warranties to include on-site labor, routine maintenance and event support. In addition, the terms of warranties on some installations can vary from one to 10 years. The specific terms and conditions of these warranties vary primarily depending on the type of the product sold. We estimate the costs which may be incurred under the warranty obligations and record a liability in the amount of such estimated costs at the time the revenue is recognized. Factors affecting our estimate of the cost of our warranty obligations include historical experience and expectations of future conditions. We continually assess the adequacy of our recorded warranty accruals and, to the extent we experience any changes in warranty claim activity or costs associated with servicing those claims, our accrued warranty obligation is adjusted accordingly.

We discovered a warranty issue caused by a mechanical device failure within a module for displays primarily in our OOH applications built prior to fiscal 2013. The device failure causes a visual defect in the display. We are deploying preventative maintenance to sites impacted and can repair the device in our repair center. When certain site locations have exceeded an acceptable failure rate, we have refurbished the display to meet customers’ expectations under contractual obligations. We increased our accrued warranty obligations by $754 during the six months ended October 29, 2016, $9,174 during fiscal 2016, and $1,168 during fiscal 2015 for probable and reasonably estimable costs to remediate this issue. As of October 29, 2016, we had $3,998 remaining in accrued warranty obligations for the estimate of probable future claims related to this issue. Because failure rates are unpredictable, the final outcome of this matter is dependent on many factors that are difficult to predict. Accordingly, it is possible that the ultimate cost to resolve this matter may increase and may be materially different from the amount of the current estimate and accrual.

Changes in our warranty obligation for the six months ended October 29, 2016 consisted of the following:



	Amount
Beginning accrued warranty obligations	$	30,496
Warranties issued during the period	5,444
Settlements made during the period	(9,280		)
Changes in accrued warranty obligations for pre-existing warranties during the period, including expirations	3,190
Ending accrued warranty obligations	$	29,850

Performance guarantees: We have entered into standby letters of credit and surety bonds with financial institutions relating to the guarantee of our future performance on contracts, primarily construction-type contracts. As of October 29, 2016, we had outstanding letters of credit and surety bonds in the amount of $12,120 and $31,410, respectively. Performance guarantees are issued to certain customers to guarantee the operation and installation of the equipment and our ability to complete a contract. These performance guarantees have various terms, which are generally one year.

Leases: We lease vehicles, office space and equipment for various global sales and service locations, including manufacturing space in the United States and China. Some of these leases, including the lease for manufacturing facilities in Sioux Falls, South Dakota, include provisions for extensions or purchase. The lease for the facilities in Sioux Falls, South Dakota can be extended for an additional five years past its current term, which ends March 31, 2022, and it contains an option to purchase the property subject to the lease from March 31, 2017 to March 31, 2022 for $9,000, which approximates fair value. If the lease is extended, the purchase option increases to $9,090 for the year ending March 31, 2023 and $9,180 for the year ending March 31, 2024. Rental expense for operating leases was $1,614 and $1,464 for the six months ended October 29, 2016 and October 31, 2015, respectively.

Future minimum payments under noncancelable operating leases, excluding executory costs such as management and maintenance fees, with initial or remaining terms of one year or more consisted of the following at October 29, 2016:



Fiscal years ending	Amount
2017	$	1,169
2018	2,036
2019	1,411
2020	1,206
2021	1,004
Thereafter	1,353
	$	8,179

Purchase commitments: From time to time, we commit to purchase inventory, advertising, information technology maintenance and support services, and various other products and services over periods that extend beyond one year. As of October 29, 2016, we were obligated under the following conditional and unconditional purchase commitments, which included $450 in conditional purchase commitments:



Fiscal years ending	Amount
2017	$	945
2018	195
2019	100
2020	100
2021	100
	$	1,440

Income Taxes	6 Months Ended
Income Taxes	Oct. 29, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Note 11. Income Taxes We are subject to U.S. Federal income tax as well as income taxes of multiple state jurisdictions. As a result of the completion of examinations by the Internal Revenue Service on prior years and the expiration of statutes of limitations, our fiscal years 2013, 2014, and 2015 are the remaining years open under statutes of limitations. Certain subsidiaries are also subject to income tax in several foreign jurisdictions which have open tax years varying by jurisdiction beginning in fiscal 2005. As of October 29, 2016, we had $3,184 of unrecognized tax benefits which would reduce our effective tax rate if recognized.

Fair Value Measurement

6 Months Ended

Oct. 29, 2016

Fair Value Disclosures [Abstract]

Fair Value Measurement

Note 12. Fair Value Measurement

ASC 820, Fair Value Measurement, defines fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the measurement date. It also establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The fair value hierarchy within ASC 820 distinguishes between the following three levels of inputs which may be utilized when measuring fair value.

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than quoted prices included within Level 1 for the assets or liabilities, either directly or indirectly (for example, quoted market prices for similar assets and liabilities in active markets or quoted market prices for identical assets or liabilities in markets not considered to be active, inputs other than quoted prices that are observable for the asset or liability, or market-corroborated input).

Level 3 - Unobservable inputs supported by little or no market activity based on our own assumptions used to measure assets and liabilities.

The following table sets forth by Level within the fair value hierarchy our financial assets and liabilities that were accounted for at fair value on a recurring basis at October 29, 2016 and April 30, 2016 according to the valuation techniques we used to determine their fair values. There have been no transfers of assets or liabilities among the fair value hierarchies presented.



	Fair Value Measurements
	Level 1		Level 2			Level 3			Total
Balance as of October 29, 2016
Cash and cash equivalents	$	34,045	$	—		$	—		$	34,045
Restricted cash	205		—			—			205
Available-for-sale securities:
Certificates of deposit	—		13,804			—			13,804
U.S. Government securities	401		—			—			401
U.S. Government sponsored entities	—		2,199			—			2,199
Municipal obligations	—		1,500			—			1,500
Derivatives - currency forward contracts	—		530			—			530
Contingent liability	—		—			(1,862		)	(1,862		)
	$	34,651	$	18,033		$	(1,862	)	$	50,822
Balance as of April 30, 2016
Cash and cash equivalents	$	28,328	$	—		$	—		$	28,328
Restricted cash	198		—			—			198
Available-for-sale securities:
Certificates of deposit	—		14,927			—			14,927
U.S. Government sponsored entities	—		8,522			—			8,522
Municipal obligations	—		1,223			—			1,223
Derivatives - currency forward contracts	—		(453		)	—			(453		)
Contingent liability	—		—			(1,955		)	(1,955		)
	$	28,526	$	24,219		$	(1,955	)	$	50,790

A roll forward of the Level 3 contingent liability, both short and long-term, for the six months ended October 29, 2016 is as follows:



Contingent liability as of April 30, 2016	$	1,955
Interest	26
Foreign currency translation	(119		)
Contingent liability as of October 29, 2016	$	1,862

The following methods and assumptions were used to estimate the fair value of each class of financial instrument. There have been no changes in the valuation techniques used by us to value our financial instruments.

Cash and cash equivalents: Consists of cash on hand in bank deposits and highly liquid investments, primarily money market accounts. The fair value was measured using quoted market prices in active markets. The carrying amount approximates fair value.

Restricted cash: Consists of cash and cash equivalents held in bank deposit accounts to secure issuances of foreign bank guarantees. The fair value of restricted cash was measured using quoted market prices in active markets. The carrying amount approximates fair value.

Certificates of deposit: Consists of time deposit accounts with original maturities of less than three years and various yields. The fair value of these securities was measured based on valuations observed in less active markets than Level 1 investments from a third-party financial institution. The carrying amount approximates fair value.

U.S. Government securities: Consists of U.S. Government treasury bills, notes, and bonds with original maturities of less than three years and various yields. The fair value of these securities was measured using quoted market prices in active markets.

U.S. Government sponsored entities: Consists of Fannie Mae and Federal Home Loan Bank investment grade debt securities trading with sufficient frequency and volume to enable us to obtain pricing information on an ongoing basis. The fair value of these securities was measured based on valuations observed in less active markets than Level 1 investments. The contractual maturities of these investments vary from one month to three years.

Municipal obligations: Consist of investment grade municipal bonds trading with sufficient frequency and volume to enable us to obtain pricing information on an ongoing basis. The contractual maturities of these investments vary from two to three years. The fair value of these bonds was measured based on valuations observed in less active markets than Level 1 investments.

Derivatives – currency forward contracts: Consists of currency forward contracts trading with sufficient frequency and volume to enable us to obtain pricing information on an ongoing basis. The fair value of these securities was measured based on a valuation from a third-party bank. See Note 13. Derivative Financial Instruments for more information regarding our derivatives.

Contingent liability: Consists of a liability measured on payments owed for a business combination if certain conditions in the business performance are met. We have included the payment obligation in other long-term obligations in our consolidated balance sheet

Non-recurring measurements: The fair value measurement standard also applies to certain non-financial assets and liabilities measured at fair value on a nonrecurring basis. Certain long-lived assets such as goodwill, intangible assets and property, plant and equipment are measured at fair value in connection with business combinations or when an impairment is recognized and the related assets are written down to fair value. We did not have any business combinations during the six months ended October 29, 2016 and used Level 2 inputs to value the assets and liabilities for business combinations during fiscal 2016. See Note 6. Business Combinations for more information. We used Level 3 inputs to measure and record a technology and customer list intangible asset impairment of $830 during the second quarter of fiscal 2017.

Other measurements using fair value: We measure fixed rate long-term receivables using a discounted cash flow analysis using Level 2 inputs such as current interest rates relating to the credit quality of the customer. In addition, we measure fixed rate long-term marketing obligations, included in other long-term obligations on our consolidated balance sheet, using a discounted cash flow analysis using Level 2 inputs such as the current interest rate environment for debt as related to our credit quality. The total long-term receivables and long-term marketing obligations approximate fair value.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Derivative Financial Instruments

6 Months Ended

Oct. 29, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note 13. Derivative Financial Instruments

We utilize derivative financial instruments to manage the economic impact of fluctuations in currency exchange rates on those transactions denominated in currencies other than our functional currency, which is the U.S. dollar. We enter into currency forward contracts to manage these economic risks. We account for all derivatives on the balance sheet within accounts receivable or accounts payable measured at fair value, and changes in fair values are recognized in earnings unless specific hedge accounting criteria are met for cash flow or net investment hedges. As of October 29, 2016 and April 30, 2016, we had not designated any of our derivative instruments as accounting hedges, and thus we recorded the changes in fair value in other income (expense), net.

The foreign currency exchange contracts in aggregated notional amounts in place to exchange U.S. Dollars at October 29, 2016 and April 30, 2016 were as follows:



	October 29, 2016		April 30, 2016
	U.S. Dollars	Foreign Currency	U.S. Dollars	Foreign Currency
Foreign Currency Exchange Forward Contracts:
U.S. Dollars/Australian Dollars	9,643	12,971	7,216	10,027
U.S. Dollars/Japanese Yen	214	22,345	—	—
U.S. Dollars/Canadian Dollars	558	740	563	771
U.S. Dollars/British Pounds	5,315	3,791	1,795	1,263
U.S. Dollars/Singapore Dollars	874	1,209	261	356
U.S. Dollars/Euros	1,685	1,510	147	132

As of October 29, 2016 and April 30, 2016, there was a net asset and liability of $530 and $453, respectively, representing the fair value of foreign currency exchange forward contracts, which were determined using Level 2 inputs from a third-party bank.

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

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+ Details

Subsequent Events	6 Months Ended
Subsequent Events	Oct. 29, 2016
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 14. Subsequent Events On December 1, 2016, our Board of Directors declared a regular quarterly dividend of $0.07 per share on our common stock payable on December 23, 2016 to holders of record of our common stock on December 12, 2016. On November 15, 2016, we entered into a credit agreement and a related revolving note with a U.S. bank. We also entered into an amended and restated loan agreement and a continuing and unlimited guaranty agreement with another U.S. bank to support our credit needs outside the United States.

Basis of Presentation and Summary of Critical Accounting Policies (Policies)	6 Months Ended
	Oct. 29, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Recently Issued Accounting Pronouncements	Recent Accounting Pronouncements Accounting Standards Adopted In March 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-09, which is intended to simplify certain aspects of the accounting for share-based payment award transactions, including income tax effects when awards vest or settle, repurchase of employees’ shares to satisfy statutory tax withholding obligations, an option to account for forfeitures as they occur, and classification of certain amounts on the statements of cash flows. ASU 2016-09 is effective for annual and interim reporting periods beginning after December 15, 2016. Early adoption is permitted, and we adopted it during the first quarter of fiscal 2017. We have elected to continue to estimate forfeitures expected to occur to determine the amount of compensation cost to be recognized in each period. Provisions related to income taxes have been adopted prospectively. Provisions related to the statements of cash flows have been adopted retrospectively but did not have a material impact on our statements of cash flows. In July 2015, the FASB issued ASU 2015-11, Simplifying the Measurement of Inventory, which changes the measurement principle of inventory from the lower of cost or market to the lower of cost and net realizable value. The guidance will require prospective application at the beginning of our first quarter of fiscal 2018, but it permits adoption in an earlier period. ASU 2015-11 was adopted by the Company effective May 1, 2016 and did not have a material impact on our consolidated results of operations, cash flows, and financial position. In April 2015, the FASB issued ASU 2015-05, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40) Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. This ASU clarifies existing GAAP guidance about a customer’s accounting for fees paid in a cloud computing arrangement ("CCA") with or without a software license. Examples of cloud computing arrangements include software as a service, platform as a service, infrastructure as a service, and other similar hosting arrangements. Under ASU 2015-05, fees paid by a customer in a CCA for a software license are within the scope of the internal-use software guidance if certain criteria are met. If the criteria are not met, the fees paid are accounted for as a prepaid service contract and expensed. We have historically accounted for all fees in a CCA as a prepaid service contract. We adopted ASU 2015-05 in the first quarter of fiscal 2017 when it became effective, using the prospective method. We did not pay any fees in a CCA in the current period that met the criteria to be in the scope of the internal-use software guidance, and ASU 2015-05 had no impact on our consolidated results of operations, cash flows, and financial position. New Accounting Standards Not Yet Adopted In October 2016, the FASB issued ASU 2016-16, Income Taxes (Topic 740) Intra-Entity Transfers of Assets Other than Inventory, which is intended to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current U.S. GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party, which is an exception to the principle of comprehensive recognition of current and deferred income taxes in U.S. GAAP. This update eliminates the exception by requiring entities to recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The new guidance is effective for interim and annual periods beginning after December 15, 2017, with early adoption permitted. We are currently evaluating the effect that adopting ASU 2016-16 will have on our consolidated financial statements and related disclosures. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments, which will make eight targeted changes to how cash receipts and cash payments are presented and classified in the statements of cash flows. ASU 2016-15 is effective for interim and annual periods beginning after December 15, 2017, and will require adoption on a retrospective basis unless it is impracticable to apply, in which case we would be required to apply the amendments prospectively as of the earliest date practicable. We are currently evaluating the effect that adopting this new accounting guidance will have on our consolidated cash flows and related disclosures. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (that is, lessees and lessors). ASU 2016-02 requires lessees to apply a dual approach, classifying leases as either finance or operating leases based on the principle of whether or not the lease is effectively a financed purchase of the leased asset by the lessee. This classification will determine whether the lease expense is recognized based on an effective interest method or on a straight-line basis over the term of the lease. A lessee is also required to record a right-of-use asset and a lease liability for all leases with a term of greater than 12 months regardless of their classification. The new standard requires lessors to account for leases using an approach that is substantially equivalent to existing guidance for sales-type leases, direct financing leases and operating leases. The new guidance is effective for interim and annual periods beginning after December 15, 2018, with early adoption permitted. We are currently evaluating the effect that adopting this new accounting guidance will have on our consolidated results of operations, cash flows, and financial position. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. ASU 2014-09 is a comprehensive revenue recognition model that requires a company to recognize revenue from the transfer of goods or services to customers in an amount that reflects the consideration that the entity expects to receive in exchange for those goods or services. The FASB has also issued ASUs 2016-08, 2016-10, and 2016-12 to clarify guidance with respect to principal versus agent considerations, the identification of performance obligations and licensing and certain narrow areas and adds practical expedients. ASU 2014-09 is effective for fiscal years and interim periods beginning after December 15, 2017 (as stated in ASU 2015-14, which was issued in August 2015 and defers the effective date), and is now effective for the Company's fiscal 2019. We are evaluating the effect that adopting ASU 2014-09, as clarified, will have on our consolidated results of operations, cash flows, financial position, and related disclosures.

Earnings Per Share EPS (Tables)

6 Months Ended

Oct. 29, 2016

Earnings Per Share [Abstract]

Schedule of Earnings Per Share Reconciliation

The following is a reconciliation of the income and common share amounts used in the calculation of basic and diluted EPS for the three and six months ended October 29, 2016 and October 31, 2015:



	Net income		Shares	Per share income
For the three months ended October 29, 2016
Basic earnings per share	$	9,021	43,988	$	0.21
Dilution associated with stock compensation plans	—		110	(0.01		)
Diluted earnings per share	$	9,021	44,098	$	0.20
For the three months ended October 31, 2015
Basic earnings per share	$	3,168	43,934	$	0.07
Dilution associated with stock compensation plans	—		179	—
Diluted earnings per share	$	3,168	44,113	$	0.07
For the six months ended October 29, 2016
Basic earnings per share	$	14,560	44,051	$	0.33
Dilution associated with stock compensation plans	—		117	—
Diluted earnings per share	$	14,560	44,168	$	0.33
For the six months ended October 31, 2015
Basic earnings per share	$	6,944	43,890	$	0.16
Dilution associated with stock compensation plans	—		365	—
Diluted earnings per share	$	6,944	44,255	$	0.16

Segment Disclosure (Tables)

6 Months Ended

Oct. 29, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The following table sets forth certain financial information for each of our five operating segments for the periods indicated:



	Three Months Ended						Six Months Ended
	October 29, 2016			October 31, 2015			October 29, 2016			October 31, 2015
Net sales:
Commercial	$	39,923		$	40,066		$	76,177		$	83,276
Live Events	55,363			50,761			115,996			98,683
High School Park and Recreation	28,707			24,253			56,324			43,212
Transportation	16,101			13,294			30,387			27,061
International	29,898			29,294			48,254			55,657
	169,992			157,668			327,138			307,889

Contribution margin:
Commercial	5,837			3,993			10,333			10,106
Live Events	8,658			6,802			17,533			12,985
High School Park and Recreation	6,750			3,785			13,749			7,560
Transportation	4,531			3,183			8,132			6,363
International	2,641			2,925			2,478			4,911
	28,417			20,688			52,225			41,925

Non-allocated operating expenses:
General and administrative	8,625			8,116			17,408			16,286
Product design and development	7,126			6,975			14,169			13,943
Operating income	12,666			5,597			20,648			11,696

Nonoperating income (expense):
Interest income	171			266			376			564
Interest expense	(76		)	(28		)	(118		)	(90		)
Other income (expense), net	149			(231		)	55			(674		)

Income before income taxes	12,910			5,604			20,961			11,496
Income tax expense	3,889			2,436			6,401			4,552
Net income	$	9,021		$	3,168		$	14,560		$	6,944

Depreciation, amortization, and impairment:
Commercial	$	1,594		$	1,134		$	3,161		$	2,391
Live Events	1,273			1,097			2,553			2,418
High School Park and Recreation	451			368			889			858
Transportation	324			339			646			668
International	1,162			342			1,491			598
Unallocated corporate depreciation	668			946			1,332			1,381
	$	5,472		$	4,226		$	10,072		$	8,314

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

The following table presents information about net sales and property and equipment, net of accumulated depreciation, in the United States and elsewhere:



	Three Months Ended				Six Months Ended
	October 29, 2016		October 31, 2015		October 29, 2016		October 31, 2015
Net sales:
United States	$	134,574	$	126,211	$	269,592	$	246,078
Outside U.S.	35,418		31,457		57,546		61,811
	$	169,992	$	157,668	$	327,138	$	307,889


	October 29, 2016		April 30, 2016
Property and equipment, net of accumulated depreciation:
United States	$	64,620	$	68,233
Outside U.S.	4,518		4,930
	$	69,138	$	73,163

Marketable Securities (Tables)

6 Months Ended

Oct. 29, 2016

Marketable Securities [Abstract]

Available-for-sale Securities

As of October 29, 2016 and April 30, 2016, our available-for-sale securities consisted of the following:



	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Balance as of October 29, 2016
Certificates of deposit	$	13,804	$	—	$	—		$	13,804
U.S. Government securities	401		—		—			401
U.S. Government sponsored entities	2,201		—		(2		)	2,199
Municipal obligations	1,500		—		—			1,500
	$	17,906	$	—	$	(2	)	$	17,904
Balance as of April 30, 2016
Certificates of deposit	$	14,927	$	—	$	—		$	14,927
U.S. Government sponsored entities	8,523		—		(1		)	8,522
Municipal obligations	1,221		2		—			1,223
	$	24,671	$	2	$	(1	)	$	24,672

Investments Classified by Contractual Maturity Date



	Less than 12 months		1-5 Years		Total
Certificates of deposit	$	7,113	$	6,691	$	13,804
U.S. Government securities	401		—		401
U.S. Government sponsored agencies	800		1,398		2,198
Municipal obligations	1,205		296		1,501
	$	9,519	$	8,385	$	17,904

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details

Goodwill (Tables)

6 Months Ended

Oct. 29, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of goodwill related to each reportable segment for the six months ended October 29, 2016 were as follows:



	Live Events			Commercial			Transportation			International			Total
Balance as of April 30, 2016	$	2,304		$	3,350		$	75		$	2,387		$	8,116
Acquisition, net of cash required	—			(103		)	—			—			(103		)
Foreign currency translation	(24		)	(163		)	(24		)	(90		)	(301		)
Balance as of October 29, 2016	$	2,280		$	3,084		$	51		$	2,297		$	7,712

Inventories (Tables)

6 Months Ended

Oct. 29, 2016

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories consisted of the following:



	October 29, 2016		April 30, 2016
Raw materials	$	25,211	$	28,184
Work-in-process	7,253		6,158
Finished goods	31,168		35,485
	$	63,632	$	69,827

Commitments and Contingencies (Tables)

6 Months Ended

Oct. 29, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Product Warranty Liability

Changes in our warranty obligation for the six months ended October 29, 2016 consisted of the following:



	Amount
Beginning accrued warranty obligations	$	30,496
Warranties issued during the period	5,444
Settlements made during the period	(9,280		)
Changes in accrued warranty obligations for pre-existing warranties during the period, including expirations	3,190
Ending accrued warranty obligations	$	29,850

Schedule of Future Minimum Rental Payments for Operating Leases



Fiscal years ending	Amount
2017	$	1,169
2018	2,036
2019	1,411
2020	1,206
2021	1,004
Thereafter	1,353
	$	8,179

Long-term Purchase Commitment

As of October 29, 2016, we were obligated under the following conditional and unconditional purchase commitments, which included $450 in conditional purchase commitments:



Fiscal years ending	Amount
2017	$	945
2018	195
2019	100
2020	100
2021	100
	$	1,440

Fair Value Measurement (Tables)

6 Months Ended

Oct. 29, 2016

Fair Value Disclosures [Abstract]

Schedule of Fair Value



	Fair Value Measurements
	Level 1		Level 2			Level 3			Total
Balance as of October 29, 2016
Cash and cash equivalents	$	34,045	$	—		$	—		$	34,045
Restricted cash	205		—			—			205
Available-for-sale securities:
Certificates of deposit	—		13,804			—			13,804
U.S. Government securities	401		—			—			401
U.S. Government sponsored entities	—		2,199			—			2,199
Municipal obligations	—		1,500			—			1,500
Derivatives - currency forward contracts	—		530			—			530
Contingent liability	—		—			(1,862		)	(1,862		)
	$	34,651	$	18,033		$	(1,862	)	$	50,822
Balance as of April 30, 2016
Cash and cash equivalents	$	28,328	$	—		$	—		$	28,328
Restricted cash	198		—			—			198
Available-for-sale securities:
Certificates of deposit	—		14,927			—			14,927
U.S. Government sponsored entities	—		8,522			—			8,522
Municipal obligations	—		1,223			—			1,223
Derivatives - currency forward contracts	—		(453		)	—			(453		)
Contingent liability	—		—			(1,955		)	(1,955		)
	$	28,526	$	24,219		$	(1,955	)	$	50,790

Rollforward of Level 3 Contingent Consideration Liabilities

A roll forward of the Level 3 contingent liability, both short and long-term, for the six months ended October 29, 2016 is as follows:



Contingent liability as of April 30, 2016	$	1,955
Interest	26
Foreign currency translation	(119		)
Contingent liability as of October 29, 2016	$	1,862

Derivative Financial Instruments (Tables)

6 Months Ended

Oct. 29, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts of Outstanding Derivative Positions

The foreign currency exchange contracts in aggregated notional amounts in place to exchange U.S. Dollars at October 29, 2016 and April 30, 2016 were as follows:



	October 29, 2016		April 30, 2016
	U.S. Dollars	Foreign Currency	U.S. Dollars	Foreign Currency
Foreign Currency Exchange Forward Contracts:
U.S. Dollars/Australian Dollars	9,643	12,971	7,216	10,027
U.S. Dollars/Japanese Yen	214	22,345	—	—
U.S. Dollars/Canadian Dollars	558	740	563	771
U.S. Dollars/British Pounds	5,315	3,791	1,795	1,263
U.S. Dollars/Singapore Dollars	874	1,209	261	356
U.S. Dollars/Euros	1,685	1,510	147	132

Basis of Presentation and Summary of Critical Accounting Policies Principles of Consolidation (Details) $ in Thousands	Oct. 29, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cost Method Investments	$ 1,211

Earnings Per Share EPS - Reconciliation of Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Net income
Basic earnings per share	$ 9,021	$ 3,168	$ 14,560	$ 6,944
Dilution associated with stock compensation plans	0	0	0	0
Diluted earnings per share	$ 9,021	$ 3,168	$ 14,560	$ 6,944
Shares
Basic earnings per share (in shares)	43,988	43,934	44,051	43,890
Dilution associated with stock compensation plans (in shares)	110	179	117	365
Diluted earnings per share (in shares)	44,098	44,113	44,168	44,255
Per share income
Basic earnings per share (in dollars per share)	$ 0.21	$ 0.07	$ 0.33	$ 0.16
Dilution associated with stock compensation plans (in dollars per share)	(0.01)	0.00	0.00	0.00
Diluted earnings per share (in dollars per share)	$ 0.20	$ 0.07	$ 0.33	$ 0.16

Earnings Per Share EPS - Antidilutive Shares Excluded (Details) - Stock Options - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded from computation of earnings per share (in shares)	2,162	2,173	2,655	1,378
Antidilutive securities excluded from computation of earnings per share, weighted average exercise price (dollars per share)	$ 14.56	$ 15.13	$ 13.41	$ 18.61

Share Repurchase Program (Details) shares in Thousands, $ in Thousands	6 Months Ended
	Oct. 29, 2016 USD ($) shares
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 40,000
Stock Repurchased During Period, Shares \| shares	284
Stock Repurchased During Period, Value	$ 1,825
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 38,175

Segment Disclosure - Net Income by Segment (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016 USD ($)	Oct. 31, 2015 USD ($)	Oct. 29, 2016 USD ($) segment	Oct. 31, 2015 USD ($)
Segment Reporting Information
Number of business units \| segment			5
Net sales	$ 169,992	$ 157,668	$ 327,138	$ 307,889
Contribution margin	28,417	20,688	52,225	41,925
Depreciation and amortization
Depreciation and amortization	5,472	4,226	10,072	8,314
Non-allocated operating expenses:
General and administrative	8,625	8,116	17,408	16,286
Product design and development	7,126	6,975	14,169	13,943
Operating income	12,666	5,597	20,648	11,696
Nonoperating income (expense):
Interest income	171	266	376	564
Interest expense	(76)	(28)	(118)	(90)
Other income (expense), net	149	(231)	55	(674)
Income before income taxes	12,910	5,604	20,961	11,496
Income tax expense	3,889	2,436	6,401	4,552
Net income	9,021	3,168	14,560	6,944
Commerical
Segment Reporting Information
Net sales	39,923	40,066	76,177	83,276
Contribution margin	5,837	3,993	10,333	10,106
Depreciation and amortization
Depreciation and amortization	1,594	1,134	3,161	2,391
Live Events
Segment Reporting Information
Net sales	55,363	50,761	115,996	98,683
Contribution margin	8,658	6,802	17,533	12,985
Depreciation and amortization
Depreciation and amortization	1,273	1,097	2,553	2,418
High School Park and Recreation [Member]
Segment Reporting Information
Net sales	28,707	24,253	56,324	43,212
Contribution margin	6,750	3,785	13,749	7,560
Depreciation and amortization
Depreciation and amortization	451	368	889	858
Transportation
Segment Reporting Information
Net sales	16,101	13,294	30,387	27,061
Contribution margin	4,531	3,183	8,132	6,363
Depreciation and amortization
Depreciation and amortization	324	339	646	668
International
Segment Reporting Information
Net sales	29,898	29,294	48,254	55,657
Contribution margin	2,641	2,925	2,478	4,911
Depreciation and amortization
Depreciation and amortization	1,162	342	1,491	598
Unallocated
Depreciation and amortization
Depreciation and amortization	$ 668	$ 946	$ 1,332	$ 1,381

Segment Disclosure - Net Sales and Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015	Apr. 30, 2016
Net sales:
Net sales	$ 169,992	$ 157,668	$ 327,138	$ 307,889
Long-lived assets:
Long-lived assets	69,138		69,138		$ 73,163
United States
Net sales:
Sales	134,574	126,211	269,592	246,078
Long-lived assets:
Long-lived assets	64,620		64,620		68,233
Outside U.S.
Net sales:
Sales	35,418	$ 31,457	57,546	$ 61,811
Long-lived assets:
Long-lived assets	$ 4,518		$ 4,518		$ 4,930

Marketable Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Oct. 29, 2016	Apr. 30, 2016
Schedule of Available-for-sale Securities
Amortized Cost	$ 17,906	$ 24,671
Unrealized Gains	0	2
Unrealized Losses	(2)	(1)
Fair Value	17,904	24,672
Certificates of deposit
Schedule of Available-for-sale Securities
Amortized Cost	13,804	14,927
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	13,804	14,927
U.S. Government securities
Schedule of Available-for-sale Securities
Amortized Cost	401
Unrealized Gains	0
Unrealized Losses	0
Fair Value	401
U.S. Government sponsored entities
Schedule of Available-for-sale Securities
Amortized Cost	2,201	8,523
Unrealized Gains	0	0
Unrealized Losses	(2)	(1)
Fair Value	2,199	8,522
Municipal obligations
Schedule of Available-for-sale Securities
Amortized Cost	1,500	1,221
Unrealized Gains	0	2
Unrealized Losses	0	0
Fair Value	$ 1,500	$ 1,223

Marketable Securities - Available-for-sale by Maturity Date (Details) $ in Thousands	Oct. 29, 2016 USD ($)
Schedule of Available-for-sale Securities
Less than 12 months	$ 9,519
Greater than 12 months	8,385
Total	17,904
Certificates of deposit
Schedule of Available-for-sale Securities
Less than 12 months	7,113
Greater than 12 months	6,691
Total	13,804
U.S. Government securities
Schedule of Available-for-sale Securities
Less than 12 months	401
Greater than 12 months	0
Total	401
U.S. Government sponsored entities
Schedule of Available-for-sale Securities
Less than 12 months	800
Greater than 12 months	1,398
Total	2,198
Municipal obligations
Schedule of Available-for-sale Securities
Less than 12 months	1,205
Greater than 12 months	296
Total	$ 1,501

Business Combination (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
Business Combination (Details) - USD ($) $ in Thousands	Aug. 11, 2014	Oct. 29, 2016	Apr. 30, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015	Mar. 15, 2016
Business Acquisition [Line Items]
Goodwill		$ 7,712	$ 8,116		$ 7,712
Net sales		169,992		$ 157,668	327,138	$ 307,889
Data Display
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Goodwill	$ 1,463
Property and Equipment	1,433
Investment for Affiliates	437
Inventory	2,624
Accounts Receivable	3,063
Other Current Assets	1,892
Current Liabilities	3,695
Long-term Obligations	950
Data Display \| Trademarks and Technology
Business Acquisition [Line Items]
Acquired finite-lived intangible asset	$ 480
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	20 years
Data Display \| Customer Relationships
Business Acquisition [Line Items]
Acquired finite-lived intangible asset	$ 84
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	18 years
ADFLOW Networks [Member]
Business Acquisition [Line Items]
Percentage of voting interests acquired							100.00%
Property and Equipment							$ 58
Inventory							230
Accounts Receivable							1,283
Other Current Assets							616
Current Liabilities							935
Long-term Obligations							$ 1,545
Goodwill, Acquired During Period			2,399
Business Combination, Consideration Transferred, Deferred Payments			$ 1,833
Business Combination, Contingent Consideration, Deferred Payments Term			3 years
ADFLOW Networks [Member] \| Customer Relationships
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			$ 2,692
ADFLOW Networks [Member] \| Computer Software, Intangible Asset [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			3,176
Commerical
Business Acquisition [Line Items]
Goodwill		3,084	$ 3,350		3,084
Net sales		$ 39,923		$ 40,066	76,177	$ 83,276
Commerical \| ADFLOW Networks [Member]
Business Acquisition [Line Items]
Net sales					$ 4,882

Goodwill (Details) $ in Thousands	6 Months Ended
Goodwill (Details) $ in Thousands	Oct. 29, 2016 USD ($)
Goodwill
Balance as of April 30, 2016	$ 8,116
Acquisition, net of cash required	(103)
Foreign currency translation	(301)
Balance as of October 29, 2016	7,712
Live Events
Goodwill
Balance as of April 30, 2016	2,304
Acquisition, net of cash required	0
Foreign currency translation	(24)
Balance as of October 29, 2016	2,280
Commerical
Goodwill
Balance as of April 30, 2016	3,350
Acquisition, net of cash required	(103)
Foreign currency translation	(163)
Balance as of October 29, 2016	3,084
Transportation
Goodwill
Balance as of April 30, 2016	75
Acquisition, net of cash required	0
Foreign currency translation	(24)
Balance as of October 29, 2016	51
International
Goodwill
Balance as of April 30, 2016	2,387
Acquisition, net of cash required	0
Foreign currency translation	(90)
Balance as of October 29, 2016	$ 2,297

Inventories (Details) - USD ($) $ in Thousands	Oct. 29, 2016	Apr. 30, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 25,211	$ 28,184
Work-in-process	7,253	6,158
Finished goods	31,168	35,485
Inventories	$ 63,632	$ 69,827

Receivables (Details) - USD ($) $ in Thousands	6 Months Ended
Receivables (Details) - USD ($) $ in Thousands	Oct. 29, 2016	Apr. 30, 2016
Receivables
Allowance for doubtful accounts	$ 2,692	$ 2,797
Retainage on construction-type contracts, expected to be collected in one year	1,376	437
Financing Receivable
Receivables
Long-term contracts and lease receivables, present value	6,270	7,038
Long-term contracts and lease receivables, face amount	$ 7,095	$ 7,236
Financing Receivable \| Minimum
Receivables
Contract and lease receivables annual interest rates	4.80%
Financing Receivable \| Maximum
Receivables
Contract and lease receivables annual interest rates	10.00%

Commitments and Contingencies - Guarantees and Warranties (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Oct. 29, 2016	Apr. 30, 2016	May 02, 2015	Oct. 29, 2016
Warranties:
Identified warranty obligations accrued	$ 3,190
Remaining accrual	30,496	$ 30,496		$ 29,850
Movement in Standard Product Warranty Accrual
Beginning accrued warranty costs	30,496
Warranties issued during the period	5,444
Settlements made during the period	(9,280)
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations	3,190
Ending accrued warranty costs	$ 29,850	30,496
Minimum
Warranties:
Standard parts warranty period	1 year
Installation warranty period	1 year
Maximum
Warranties:
Standard parts warranty period	5 years
Installation warranty period	10 years
Performance guarantees \| Letter of credit and bank guarantees agreements
Guarantees:
Performance guarantees outstanding				12,120
Performance guarantees \| Surety bonds
Guarantees:
Performance guarantees outstanding				31,410
Out-of-Home Product Application
Warranties:
Identified warranty obligations accrued	$ 754	9,174	$ 1,168
Remaining accrual	3,998			$ 3,998
Movement in Standard Product Warranty Accrual
Changes in accrued warranty costs for pre-existing warranties during the period, including expirations	754	$ 9,174	$ 1,168
Ending accrued warranty costs	$ 3,998

Commitments and Contingencies - Leases (Details) - USD ($) $ in Thousands	6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015
Operating Leased Assets
Operating leases, rent expense	$ 1,614	$ 1,464
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity
2017	1,169
2018	2,036
2019	1,411
2020	1,206
2021	1,004
Thereafter	1,353
Total	8,179
March 31, 2017 to March 31, 2022
Operating Leased Assets
Operating leases, purchase option price	9,000
April 1, 2022 to March 31, 2023
Operating Leased Assets
Operating leases, purchase option price	9,090
April 1, 2023 to March 31, 2024
Operating Leased Assets
Operating leases, purchase option price	$ 9,180

Commitments and Contingencies - Purchase Commitments (Details) $ in Thousands	Oct. 29, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Conditional purchase commitment	$ 450
Purchase Obligation, Fiscal Year Maturity
2017	945
2018	195
2019	100
2020	100
2021	100
Total	$ 1,440

Income Taxes (Details) $ in Thousands	Oct. 29, 2016 USD ($)
Income Tax Disclosure [Abstract]
Unrecognized tax benefits that would affect our effective tax rate if recognized	$ 3,184

Fair Value Measurement (Details) - USD ($) $ in Thousands	6 Months Ended
Fair Value Measurement (Details) - USD ($) $ in Thousands	Oct. 29, 2016	Oct. 31, 2015	Apr. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	$ 17,904		$ 24,672
Impairment loss of intangible assets	830	$ 0
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	13,804		14,927
U.S. Government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	401
U.S. Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	2,199		8,522
Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	1,500		1,223
Reported Value Measurement [Member] \| Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	34,045		28,328
Restricted cash	205		198
Derivatives-currency forward contract, asset	530
Derivatives - currency forward contracts, liability			(453)
Contingent liability	(1,862)		(1,955)
Assets (Liabilities), net	50,822		50,790
Reported Value Measurement [Member] \| Recurring Basis \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	13,804		14,927
Reported Value Measurement [Member] \| Recurring Basis \| U.S. Government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	401
Reported Value Measurement [Member] \| Recurring Basis \| U.S. Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	2,199		8,522
Reported Value Measurement [Member] \| Recurring Basis \| Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	1,500		1,223
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	34,045		28,328
Restricted cash	205		198
Derivatives-currency forward contract, asset	0
Derivatives - currency forward contracts, liability			0
Contingent liability	0		0
Assets (Liabilities), net	34,651		28,526
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 1 \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0		0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 1 \| U.S. Government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	401
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 1 \| U.S. Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0		0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 1 \| Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0		0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	0		0
Restricted cash	0		0
Derivatives-currency forward contract, asset	530
Derivatives - currency forward contracts, liability			(453)
Contingent liability	0		0
Assets (Liabilities), net	18,033		24,219
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 2 \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	13,804		14,927
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 2 \| U.S. Government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 2 \| U.S. Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	2,199		8,522
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 2 \| Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	1,500		1,223
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash and cash equivalents	0		0
Restricted cash	0		0
Derivatives-currency forward contract, asset	0
Derivatives - currency forward contracts, liability			0
Contingent liability	(1,862)		(1,955)
Assets (Liabilities), net	(1,862)		(1,955)
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 3 \| Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0		0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 3 \| U.S. Government securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 3 \| U.S. Government sponsored entities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	0		0
Estimate of Fair Value Measurement [Member] \| Recurring Basis \| Level 3 \| Municipal obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale securities:	$ 0		$ 0

Fair Value Measurement - Roll Forward of the Level 3 Contingent Consideration Liability (Details) - Estimate of Fair Value Measurement [Member] - Level 3 - Recurring Basis - Contingent Consideration Liability $ in Thousands	6 Months Ended
	Oct. 29, 2016 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Contingent liability as of April 30, 2016	$ 1,955
Interest	26
Foreign currency translation	(119)
Contingent liability as of October 29, 2016	$ 1,862

Derivative Financial Instruments (Details) € in Thousands, £ in Thousands, zł in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Oct. 29, 2016 CAD ($)	Oct. 29, 2016 AUD ($)	Oct. 29, 2016 PLN (zł)	Oct. 29, 2016 USD ($)	Oct. 29, 2016 EUR (€)	Oct. 29, 2016 SGD ($)	Oct. 29, 2016 GBP (£)	Apr. 30, 2016 CAD ($)	Apr. 30, 2016 AUD ($)	Apr. 30, 2016 PLN (zł)	Apr. 30, 2016 USD ($)	Apr. 30, 2016 EUR (€)	Apr. 30, 2016 SGD ($)	Apr. 30, 2016 GBP (£)
U.S. Dollars/Australian Dollars
Derivative
Foreign Currency Exchange Forward Contracts:		$ 12,971		$ 9,643					$ 10,027		$ 7,216
U.S. Dollars/Japanese Yen
Derivative
Foreign Currency Exchange Forward Contracts:			zł 22,345	214						zł 0	0
U.S. Dollars/Canadian Dollars
Derivative
Foreign Currency Exchange Forward Contracts:	$ 740			558				$ 771			563
U.S. Dollars/British Pounds
Derivative
Foreign Currency Exchange Forward Contracts:				5,315			£ 3,791				1,795			£ 1,263
U.S. Dollars/Singapore Dollars
Derivative
Foreign Currency Exchange Forward Contracts:				874		$ 1,209					261		$ 356
U.S. Dollars/Euros
Derivative
Foreign Currency Exchange Forward Contracts:				$ 1,685	€ 1,510						$ 147	€ 132

Subsequent Events (Details) - $ / shares		3 Months Ended		6 Months Ended
Subsequent Events (Details) - $ / shares	Dec. 02, 2016	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Subsequent Event [Line Items]
Cash dividend declared per share (in dollars per share)		$ 0.07	$ 0.10	$ 0.17	$ 0.20
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividend declared per share (in dollars per share)	$ 0.07