Electro Scientific Industries (ESIO) 10-K 15 Jun 16 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Apr. 02, 2016	Jun. 10, 2016	Sep. 26, 2015
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Apr. 2, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Entity Registrant Name	ELECTRO SCIENTIFIC INDUSTRIES INC
Entity Central Index Key	726,514
Current Fiscal Year End Date	--03-28
Entity Well-know Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		31,471,682
Entity Public Float			$ 126,411,014

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Current assets:
Cash and cash equivalents	$ 42,413	$ 50,994
Short-term investments	15,252	6,612
Accounts Receivable, Net, Current	42,770	42,295
Inventories	60,470	56,637
Shipped systems pending acceptance	1,181	2,516
Deferred income taxes, net	0	178
Other current assets	5,340	6,090
Total current assets	167,426	165,322
Non-current assets:
Property, plant and equipment, net	24,543	25,858
Non-current deferred income taxes, net	914	174
Goodwill	7,445	7,717
Acquired intangible assets, net	7,146	8,958
Other assets	12,626	13,211
Total assets	220,100	221,240
Current liabilities:
Accounts payable	16,061	9,514
Accrued liabilities	18,334	18,666
Deferred Tax Liabilities, Net, Current	0	173
Deferred revenue	6,373	12,376
Total current liabilities	40,768	40,729
Non-current liabilities:
Non-current income taxes payable	1,266	1,176
Deferred Tax Liabilities, Net, Noncurrent	234	443
Liabilities, Other than Long-term Debt, Noncurrent	7,801	1,571
Liabilities	$ 50,069	$ 43,919
Commitments and Contingencies
Shareholders' equity:
Preferred stock, without par value	$ 0	$ 0
Common stock, without par value	195,024	189,134
Retained earnings	(23,998)	(11,741)
Accumulated other comprehensive income	(995)	(72)
Total shareholders' equity	170,031	177,321
Total liabilities and shareholders' equity	$ 220,100	$ 221,240

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 1,039	$ 712
Preferred Stock, No Par Value	$ 0	$ 0
Preferred Stock, Shares Authorized	1,000,000	1,000,000
Preferred Stock, Shares Issued	0	0
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	100,000,000	100,000,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 107,910	$ 102,901
Finite-Lived Intangible Assets, Accumulated Amortization	$ 21,146	$ 19,880
Common Stock, Shares, Issued	31,613,000	30,704,000
Common Stock, Shares, Outstanding	31,613,000	30,704,000

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Revenue, Net	$ 184,391	$ 159,118	$ 181,167
Sales Revenue, Goods, Net	142,957	111,603	142,054
Sales Revenue, Services, Net	41,434	47,515	39,113
Cost of sales	111,688	104,437	121,296
Cost of Goods Sold	89,169	78,195	100,870
Cost of Services	22,519	26,242	20,426
Gross profit	72,703	54,681	59,871
Operating expenses:
Selling, service and administration	49,753	48,525	51,598
Research, development and engineering	32,400	35,166	37,839
Restructuring costs	2,824	2,069	1,070
Business Combination, Integration Related Costs	194	776	0
Goodwill, Impairment Loss	0	7,889	0
(Gain) loss on sale of property and equipment, net	0	0	(1,301)
Gain on acquisition of Semiconductor Systems business	0	0	(499)
Net operating expenses	85,171	94,425	88,707
Operating (loss) income	(12,468)	(39,744)	(28,836)
Non-operating (expense) income:
Other than temporary impairment of cost based investments	0	4,263	9,703
Interest and other (expense) income, net	195	430	113
Total non-operating (expense) income	195	(3,833)	(9,590)
Income (loss) before income taxes	(12,273)	(43,577)	(38,426)
Provision for (benefit from) income taxes	(16)	234	(92)
Net (loss) income	$ (12,257)	$ (43,811)	$ (38,334)
Net (loss) income per share - basic	$ (0.39)	$ (1.43)	$ (1.28)
Net (loss) income per share - diluted	$ (0.39)	$ (1.43)	$ (1.28)
Weighted average number of shares - basic	31,411	30,611	29,974
Weighted average number of shares - diluted	31,411	30,611	29,974
Cash dividends paid per common share	$ 0	$ 0.24	$ 0.32

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Statement - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Net (loss) income	$ 1,953	$ (4,586)	$ (3,260)	$ (6,364)	$ (22,941)	$ (6,376)	$ (6,243)	$ (8,251)	$ (12,257)	$ (43,811)	$ (38,334)
Cumulative translation adjustment, net of tax									(922)	(384)	37
Accumulated other comprehensive loss related to benefit plan obligations, net of tax									(4)	(25)	22
Net unrealized (loss) gain on available-for-sale securities, net of tax									3	(15)	9
Comprehensive (loss) income									$ (13,180)	$ (44,235)	$ (38,266)

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ 0	$ 0	$ 21
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	(21)	(13)	19
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	$ 1	$ (5)	$ 5

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of year at Mar. 30, 2013	$ 264,142	$ 176,631	$ 87,228	$ 283
Balance at beginning of year (shares) at Mar. 30, 2013		29,583,000
Cash dividends paid	(9,558)		(9,558)
Stock plans:
Employee stock plans (shares)		592,000
Employee stock plans	$ 6,753	$ 6,753
Stock Repurchased During Period, Shares	(19,832)
Stock Repurchased During Period, Value	$ (191)
Share repurchases	200
Comprehensive income (loss):
Net (loss) income	(38,334)		(38,334)
Other Comprehensive Income (Loss), Net of Tax	69			69
Net unrealized gain on securities, net of tax	9
Cumulative translation adjustment, net of tax	37
Accumulated other comprehensive loss related to benefit plan obligations, net of tax	22
Comprehensive (loss) income	(38,266)
Balance at end of year at Mar. 29, 2014	222,881	$ 183,193	39,336	352
Balance at end of year (shares) at Mar. 29, 2014		30,155,000
Cash dividends paid	(7,266)		(7,266)
Stock plans:
Employee stock plans (shares)		757,000
Employee stock plans	$ 4,555	$ 4,555
Stock Repurchased During Period, Shares	(207,738)
Stock Repurchased During Period, Value	$ (1,456)
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	2,842
Share repurchases	1,500
Comprehensive income (loss):
Net (loss) income	(43,811)		(43,811)
Other Comprehensive Income (Loss), Net of Tax				(424)
Net unrealized gain on securities, net of tax	(15)
Cumulative translation adjustment, net of tax	(384)
Accumulated other comprehensive loss related to benefit plan obligations, net of tax	(25)
Comprehensive (loss) income	(44,235)			(424)
Balance at end of year at Mar. 28, 2015	177,321	$ 189,134	(11,741)	(72)
Balance at end of year (shares) at Mar. 28, 2015		30,704,000
Stock plans:
Employee stock plans (shares)		909,000
Employee stock plans	5,827	$ 5,827
Stock Repurchased During Period, Value	0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	63
Comprehensive income (loss):
Net (loss) income	(12,257)		(12,257)
Other Comprehensive Income (Loss), Net of Tax				(923)
Net unrealized gain on securities, net of tax	3
Cumulative translation adjustment, net of tax	(922)
Accumulated other comprehensive loss related to benefit plan obligations, net of tax	(4)
Comprehensive (loss) income	(13,180)			(923)
Balance at end of year at Apr. 02, 2016	$ 170,031	$ 195,024	$ (23,998)	$ (995)
Balance at end of year (shares) at Apr. 02, 2016		31,613,000

CONSOLIDATED STATEMENTS OF SHA8

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended								12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Cash dividends paid per common share	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.08	$ 0.08	$ 0.08	$ 0	$ 0.24	$ 0.32

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (12,257)	$ (43,811)	$ (38,334)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization	7,343	7,817	7,642
Amortization	1,376	1,502	2,985
Share-based compensation expense	5,103	4,542	6,105
Provision for (recovery of) doubtful accounts	329	53	0
Gain on sale of property and equipment, net	862	(6)	(1,138)
Gain on acquisition of Semiconductor Systems business	0	0	(499)
Other than temporary impairment of cost based investments	0	4,263	9,703
Goodwill, Impairment Loss	0	7,889	0
Decrease (increase) in deferred income taxes	(877)	(54)	4,377
Changes in operating accounts, net of acquisitions:
Decrease (increase) in trade receivables, net	2,984	(7,965)	(2,195)
Decrease (increase) in inventories	(7,303)	1,091	7,567
Decrease (increase) in shipped systems pending acceptance	1,631	(462)	(1,047)
Decrease (increase) in other current assets	1,154	(200)	(728)
Increase (decrease) in accounts payable and accrued liabilities	9,048	(4,013)	(13,694)
Increase (decrease) in deferred revenue	(4,691)	1,861	140
Net cash (usedin) provided by operating activities	4,702	(27,493)	(19,116)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of investments	(380,841)	(414,705)	(268,132)
Proceeds from sales and maturities of investments	369,700	450,507	294,182
Purchase of property, plant and equipment	(3,693)	(5,374)	(7,583)
Proceeds from sale of property, plant and equipment	232	154	3,657
Cash paid to acquire subsidiaries	0	7,737	9,731
Minority equity investment	0	0	(5,000)
Decrease (increase) in other assets	790	(2,638)	438
Net cash provided by (used in) investing activities	(13,812)	20,207	7,831
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Issuance of Common Stock	1,362	1,863	2,237
Payments Related to Tax Withholding for Share-based Compensation	(638)	(1,850)	(1,589)
Cash dividends paid to shareholders	0	(7,266)	(9,557)
Stock Repurchased During Period, Value	0	(1,456)	(191)
Net cash (used in) provided by financing activities	724	(8,709)	(9,100)
Effect of exchange rate changes on cash	(195)	(1,472)	(67)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(8,581)	(17,467)	(20,452)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	50,994	68,461
CASH AND CASH EQUIVALENTS AT END OF PERIOD	42,413	50,994	68,461
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest	(57)	(109)	0
Cash paid for income taxes	(806)	(1,157)	(3,256)
Income tax refunds received	140	633	163
Property, Plant and Equipment, Gross, Period Increase (Decrease)	3,866	1,091	4,958
Property, Plant and Equipment, Additions	766	372	461
Retained Earnings [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (12,257)	$ (43,811)	$ (38,334)

The Company

The Company	12 Months Ended
	Apr. 02, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Electro Scientific Industries, Inc. and its subsidiaries (ESI) is a leading supplier of innovative laser-based micro-manufacturing solutions for industries reliant on microtechnologies. ESI's integrated solutions allow industrial designers and process engineers to control the power of laser light to transform materials in ways that differentiate their consumer electronics, wearable devices, semiconductor circuits and high-precision components for market advantage. Founded in 1944, ESI is headquartered in Portland, Oregon, with global operations and subsidiaries in Asia, Europe and North America.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Apr. 02, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements include the accounts of Electro Scientific Industries, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated. The Company’s fiscal year consists of 52 or 53 weeks ending on the Saturday nearest March 31. Accordingly, the fiscal 2016 reporting period consisted of a 53 -week period ending on April 2, 2016 , the fiscal 2015 reporting period consisted of a 52 -week period ending on March 28, 2015 and the fiscal 2014 reporting period consisted of a 52 -week period ending on March 29, 2014 . All references to years or quarters relate to fiscal years or fiscal quarters unless otherwise noted. Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of commitments and contingencies at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results may differ from those estimates. Management believes that the estimates used are reasonable. Significant estimates made by management include: revenue recognition; inventory valuation; product warranty reserves; allowance for doubtful accounts; accrued restructuring costs; share-based compensation; income taxes including the valuation of deferred tax assets; fair value measurements; valuation of long-lived assets; and valuation of goodwill. Risks and Uncertainties The Company uses financial instruments that potentially subject it to concentrations of credit risk. Such instruments include cash equivalents, available-for-sale marketable securities, trade receivables and financial instruments used in hedging activities. The Company invests cash in cash deposits, money market funds, commercial paper, certificates of deposit and readily marketable securities. Investments are placed with high credit quality financial institutions and the credit exposure from any one institution or instrument is minimized. See Note 5 “Fair Value Measurements” for further discussion on these investments. The Company sells a significant portion of its products to a small number of large semiconductor, PCB's and microelectronics manufacturers. The top ten customers accounted for approximately 51% , 40% and 41% of total net sales in 2016 , 2015 and 2014 , respectively. One customer, Apple Inc., and its affiliates, accounted for approximately 15% , 9% and 15% of total net sales in 2016 , 2015 and 2014 , respectively, a majority of which are in the Micromachining products group. No other customer individually accounted for more than 10% of total net sales in 2016 , 2015 or 2014 . The Company’s operating results may be adversely affected if orders and revenues from these key customers decline. The Company uses qualified manufacturers to supply many components and sub-system modules of its products. The systems that the Company manufactures use high-performance computers, peripherals, lasers and other components from various suppliers. The Company obtains some of the components from a single source or a limited group of suppliers. An interruption in the supply of a particular component may have a temporary adverse impact on the Company’s operating results. The Company’s net investment exposure in foreign subsidiaries translated into U.S. dollars using the period-end exchange rates at April 2, 2016 and March 28, 2015 was approximately $56.9 million and $64.3 million, respectively. The potential loss in fair value resulting from a hypothetical 10% adverse change in foreign exchange rates would be approximately $5.7 million and $6.4 million at April 2, 2016 and March 28, 2015 , respectively. Foreign exchange rate gains or losses on foreign investments as of April 2, 2016 were reflected as a cumulative translation adjustment, net of tax, and do not affect the Company’s results of operations. The Company’s operations involve a number of other risks and uncertainties including but not limited to those relating to the cyclicality of the microelectronics and semiconductor markets, the effect of general economic conditions, rapid changes in technology and international operations. Immaterial Revision to Prior Period Financial Statements In the current year, certain prior period amounts have been revised, which conforms to the current year presentation. Please see Note 7 Trade Accounts Receivable , Note 15 Accrued Current Liabilities & Other Liabilities and Note 24 Segment and Geographic Information . Cash Equivalents and Investments All highly liquid investments with a maturity of 90 days or less at the date of purchase are considered to be cash equivalents. Short-term investments reflect marketable securities that have maturities of less than one year or are subject to immediate pre-payment or call provisions. These securities consist primarily of marketable debt securities and are classified as “available-for-sale securities” and recorded at fair market value. Unrealized gains and losses on short-term investments are recorded as a component of accumulated other comprehensive income (loss). To determine whether any existing impairment is other-than-temporary and requires recognition of an impairment loss in the results of operations, the Company evaluates its marketable securities based on the nature of the investments and the Company’s intent and ability to hold the securities until the securities are no longer in an unrealized loss position. Accounts Receivable and Allowance for Doubtful Accounts Trade receivables are stated at the amount the Company expects to collect and do not bear interest. Credit limits are established by reviewing the financial history and stability of each customer. Where appropriate, the Company obtains credit rating reports and financial statements of the customer to establish or modify credit limits. On certain foreign sales, letters of credit are obtained. The collectability of trade receivable balances is regularly evaluated based on a combination of factors such as customer reputation and credit-worthiness, past transaction history with the customer, current economic and industry trends, and changes in customer payment terms. If it is determined or estimated that a customer will be unable to fully meet its financial obligation, such as in the case of a bankruptcy filing or other material events impacting its business, a specific allowance for bad debt is recorded to reduce the related receivable to the amount expected to be recovered. Accrued Restructuring Costs The Company has engaged, and may continue to engage, in restructuring actions, which require it to make estimates in certain areas including expenses for severance and other employee separation costs. Because the Company has a history of paying severance benefits, expenses associated with exit or disposal activities are recognized when probable and estimable. Should the actual amounts differ from our estimates, the amount of the restructuring charges could be materially impacted. See Note 25 “Restructuring and Cost Management Plans” for further discussion. Inventories Inventories are principally valued at standard costs, which approximate the lower of cost (first-in, first-out) or market. Costs utilized for inventory valuation purposes include material, labor and manufacturing overhead. We regularly evaluate the carrying value of inventory based on a combination of factors including, but not limited to, the following: product life cycle, forecasted sales or usage, historical usage rates, estimated service period, product end-of-life dates, estimated current and future market values, service inventory requirements and new product introductions. Purchasing requirements and alternative uses for the inventory are explored within these processes to mitigate inventory exposure. Inventory materials with quantities in excess of forecasted usage are reviewed quarterly for obsolescence. Obsolescence write-downs are typically caused by engineering change orders or product life cycle changes. Research and development product costs are generally expensed as incurred. Engineering materials that are expected to provide future value are generally classified as raw materials inventory. Finished goods are reviewed quarterly by product marketing and operating personnel to determine if inventory carrying value exceeds market selling prices. When necessary, we record inventory write-downs as an increase to cost of sales based on the above factors and take into account worldwide quantities on hand, product life cycle and forecasted demand into our analysis. Shipped Systems Pending Acceptance Shipped systems pending acceptance relate to systems that have been ordered and shipped to the customer, but where revenue has been deferred in accordance with the Company’s revenue recognition policy. Shipped systems pending acceptance are recognized as cost of sales once all criteria for revenue recognition have been met and revenue is recorded. Shipped systems pending acceptance are valued at standard costs, which approximate the lower of cost (first-in, first-out) or market. Costs utilized in the valuation of shipped systems pending acceptance include material, labor and manufacturing overhead and exclude costs of installation. Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are recognized using the straight-line basis over the estimated useful lives of the assets. Expenditures for maintenance, repairs and minor improvements are expensed as incurred. Major improvements and additions are capitalized. When assets are sold or retired, the cost and related accumulated depreciation and amortization are removed from the accounts and the resulting gain or loss is included as a component of operating expenses. Long-Lived Asset Impairment Long-lived assets, principally property, plant and equipment and identifiable long-lived intangibles, are reviewed for impairment whenever events or circumstances indicate that the carrying amount of the assets may not be recoverable. The Company evaluates for recoverability of assets to be held and used by comparing the carrying amount of an asset or asset group to estimated future net undiscounted cash flows generated by the asset. If such assets are considered to be impaired, the impairment recognized is measured as the amount by which the carrying amount of the assets exceeds the fair value of the assets. The Company’s purchased patents are amortized over their estimated useful lives, generally nine to seventeen years. Other purchased intangible assets with estimated useful lives are carried at cost less accumulated amortization. Amortization expense is recognized on a straight-line basis over the estimated useful lives of the intangible assets, which range from one to ten years. Goodwill Impairment The Company accounts for goodwill pursuant to Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 350 as amended in September 2011 by Accounting Standard Update (ASU) 2011-08, “Intangibles-Goodwill and Other (ASC Topic 350): Testing Goodwill for Impairment” (ASC ASU 2011-08). ASC Topic 350 requires that goodwill be tested for impairment at least annually. ASC ASU 2011-08 permits an entity to make a qualitative assessment of whether it is more likely than not that a reporting units' fair value is less than its carrying amount (a "step zero" analysis) before applying the two-step goodwill impairment test. The Company tests goodwill for impairment annually or more frequently if an event occurs or circumstances would indicate that it is more likely than not the fair value of the reporting unit is less than the carrying value. In the current year, the Company did not elect to perform a step zero and proceeded with a step one analysis of the goodwill related to the Topwin reporting unit. The date of the annual test of goodwill is the first day of the fourth quarter. The carrying value of the reporting unit is determined based on an allocation of the Company's assets and liabilities to the reporting unit using reasonable assumptions. If potential impairment is indicated by the step one test, the Company performs a step two test to determine the fair value of goodwill. Other Assets Other assets include consignment, demonstration (demo) and training equipment, long-term deposits, and non-current accounts receivable. Consignment, demo and training equipment are recorded at the lower of standard costs or estimated market values, until the assets are sold. Fair Value of Financial Instruments The carrying amounts of financial instruments, including cash equivalents and accrued liabilities approximate fair value because of the nature of the underlying transactions and short-term maturities involved. Current and non-current marketable securities are recorded at fair value which is defined under FASB ASC Topic 820 “Fair Value Measurements and Disclosures” (ASC Topic 820). ASC Topic 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include the following: • Level 1 , defined as observable inputs such as quoted prices in active markets for identical assets or liabilities; • Level 2 , defined as inputs that are observable either directly or indirectly such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active and other inputs that can be corroborated by observable market data; and • Level 3 , defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. See Note 5 “Fair Value Measurements” for further discussion and disclosure of fair value on our financial assets and investments. Derivative Financial Instruments The Company’s primary objective for holding derivative financial instruments is to manage currency risk. The Company’s accounting policies for these instruments are based on whether they meet the Company’s criteria for designation as hedging transactions, either as cash flow or fair value hedges. A hedge of the exposure to variability in the cash flows of an asset or a liability, or of a forecasted transaction, is referred to as a cash flow hedge. A hedge of the exposure to changes in fair value of an asset or a liability, or of an unrecognized firm commitment, is referred to as a fair value hedge. The criteria for designating a derivative as a hedge include the instrument’s effectiveness in risk reduction and, in most cases, a one-to-one matching of the derivative instrument to its underlying transaction. The Company enters into foreign currency exchange contracts to offset the earnings impact relating to the variability in exchange rates on certain short-term monetary assets and liabilities denominated in non-functional currencies. The Company does not designate these foreign currency contracts as hedges. The change in fair value of these derivative instruments not designated as hedging instruments is reported each period in other income (expense), net, in our Consolidated Statement of Operations. Revenue Recognition The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or the services have been rendered, the sales price is fixed or determinable and collection of the related receivable is reasonably assured. Title and risk of loss generally pass to the customer at the time of delivery of the product to a common carrier. Revenue is recognized upon such delivery, provided that fulfillment of acceptance criteria can be demonstrated prior to shipment. Where the acceptance criteria cannot be demonstrated prior to shipment, or in the case of substantially new products, revenue is deferred until acceptance has been received. For multiple element arrangements, the relative fair value of any undelivered elements is deferred until the elements are delivered and acceptance criteria, if any, are met. Revenues are recorded net of taxes collected which are required to be submitted to government authorities. Installation services are not essential to the functionality of the delivered equipment and installation revenue is deferred as a separate deliverable until installation is complete. Neither accrued installation costs nor the fair value of installation service revenue deferred has been material. Revenues associated with sales to customers under local contracts in Japan are recognized upon title transfer, which generally occurs upon customer acceptance. Revenues related to spare parts and consumable sales are generally recognized upon shipment. Revenues related to maintenance and service contracts are generally recognized ratably over the duration of the contracts. Product Warranty The Company evaluates obligations related to product warranties quarterly. A standard warranty is provided on most of our products over a specified period of time, generally twelve to twenty-four months, at no cost to our customers. Warranty charges are comprised of costs to service the warranty, including labor to repair the system and replacement parts for defective items, as well as other costs incidental to the repairs. Warranty charges are recorded net of any cost recoveries resulting from either successful repair of damaged parts or from warranties offered by the Company’s suppliers for defective components. Using historical data, the Company estimates average warranty cost per system or part type and records the provision for such charges as an element of cost of sales upon recognition of the related revenue. Additionally, the overall warranty accrual balance is separately analyzed using the remaining warranty periods outstanding on systems and items under warranty, and any resulting changes in estimates are recorded as an adjustment to cost of sales. If circumstances change, or if a significant change in warranty-related incidents occurs, the impact of the change in the warranty accrual could be material. Accrued product warranty is included on the Consolidated Balance Sheets as a component of accrued liabilities. Research and Development Research and development costs, which include labor and related employee expenses, patent maintenance fees, project materials costs, development tool placement and installation costs, project subcontractors, depreciation of engineering equipment, building costs and other administration expenses, are generally expensed as incurred. Engineering materials that are expected to provide future value are included in inventories. Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred income taxes are recognized for the future tax consequences attributable to temporary differences between the financial statement and tax balances of existing assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those assets and liabilities are expected to be recovered or settled. The effect on deferred taxes resulting from a change in tax rates is recognized in income in the period that includes the enactment date. When management determines that it is not more likely than not that a deferred tax asset will be fully realized, a valuation allowance is established to reduce deferred tax assets to the amount expected to be realized. Taxes on Unremitted Foreign Income The Company provides for income taxes on its foreign subsidiaries’ taxable income based on the effective income tax rate in each respective jurisdiction. The Company provides for deferred taxes on the undistributed earnings of a subsidiary, except to the extent that the income is intended to be indefinitely reinvested or remitted in a tax-free liquidation. The foreign jurisdictions where the Company is permanently reinvested include Singapore and China (Wuhan Topwin Optoelectronics Technology Co., Ltd.). The cumulative amount of earnings upon which U.S. income taxes have not been provided was $37.0 million and $35.3 million as of April 2, 2016 and March 28, 2015 , respectively. If not reinvested, the liability related to these earnings would have been $12.9 million and $12.2 million as of April 2, 2016 and March 28, 2015 , respectively, which may be offset by foreign tax credits or other tax attributes. Comprehensive Income (Loss) Comprehensive income (loss) includes net income (loss) and other comprehensive income (loss), which includes charges or credits to equity that are not the result of transactions with shareholders. Comprehensive income (loss) within these consolidated financial statements includes primarily cumulative foreign currency translation adjustments, benefit plan obligations and unrealized gains and losses on securities available for sale. The cumulative translation adjustment included in accumulated other comprehensive income (loss) at April 2, 2016 , March 28, 2015 and March 29, 2014 was $0.9 million , $30 thousand , and $0.4 million respectively. Earnings Per Share Basic earnings per share (EPS) is computed utilizing the weighted average number of shares outstanding during the period. Diluted EPS also considers common stock equivalents, such as stock options, stock-settled stock appreciation rights (SARs), employee stock purchase plan (ESPP) shares and restricted stock units, to the extent that they are not antidilutive. Share-Based Compensation The Company recognizes expense related to the fair value of its share-based compensation awards. The Company uses the Black-Scholes model to estimate the fair value of all share-based compensation awards on the date of grant, except for unvested restricted stock units, which are valued at the fair market value of the Company’s stock on the date of award. The Company recognizes the compensation expense for options, SARs, and unvested time-based restricted stock units on a straight-line basis, net of estimated forfeitures, over the requisite service period of the award. The performance-based stock awards specify certain performance conditions that must be achieved in order for the awards to vest. The related compensation expense for this type of award is recognized on a straight-line basis, net of estimated forfeitures, over the related service period. The amount of compensation expense is dependent on our periodic assessment of the probability of the targets being achieved and our estimate, which may vary over time, of the number of shares that ultimately will be issued. Segment Reporting The Company complies with ASC Topic 280 “Segment Reporting” (ASC Topic 280). ASC Topic 280, which is based on a management approach to segment reporting, establishes requirements to report selected segment information quarterly and to report annually entity-wide disclosures about products, major customers and the geographies in which the entity holds material assets and reports revenue. An operating segment is defined as a component that engages in business activities whose operating results are reviewed by the chief operating decision maker and for which discrete financial information is available. Based on the provisions of ASC Topic 280, the Company has determined that it operates in two segments: Component Processing and Micromachining. There are no differences between the accounting policies used for our business segments compared to those used on a consolidated basis. Employee Benefit Plans The Company has an employee savings plan under the provisions of Section 401(k) of the Internal Revenue Code. During 2016 and 2015 , contributions to the plan by the Company were $0.7 million and $0.6 million, respectively. The Company has defined benefit retirement plans at certain of its foreign subsidiaries. The Company accounts for these plans based on the provisions of ASC Topic 715 “Compensation-Retirement Benefits”. These plans are immaterial to the financial statements of the Company as a whole.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Apr. 02, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In April 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-10, “Revenue from Contracts with Customers (Topic 606) - Identifying Performance Obligations and Licensing.” ASU 2016-10 clarifies aspects of Topic 606 related to identifying performance obligations and the licensing implementation guidance, while retaining the related core principles for those areas. The effective date and transition requirements for ASU 2016-10 are the same as the effective date and transition requirements in ASU 2014-09. While we do not expect the adoption of ASU 2016-10 to have a material effect on our business, we are still evaluating any potential impact that adoption of ASU 2016-10 may have on our financial position, results of operations or cash flows. In March 2016, the FASB issued ASU 2016-09, “Compensation – Stock Compensation – Improvements to Employee Share-Based Payment Accounting.” ASU 2016-09 simplifies the accounting for several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods, which would be the Company's fiscal year ending March 31, 2018. While we do not expect the adoption of ASU 2016-09 to have a material effect on our business, we are still evaluating any potential impact that adoption of ASU 2016-09 may have on our financial position, results of operations or cash flows. In February 2016, the FASB issued ASU 2016-02, “Leases.” ASU 2016-02 increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requires disclosing key information about leasing arrangements. ASU 2016-02 is effective for annual periods beginning after December 15, 2018 and interim periods within those annual periods, which would be the Company's fiscal year ending March 29, 2020. While we do not expect the adoption of ASU 2016-02 to have a material effect on our business, we are still evaluating any potential impact that adoption of ASU 2016-02 may have on our financial position, results of operations or cash flows. In January 2016, the FASB issued ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10)." ASU 2016-01 enhances the reporting model for financial instruments to provide users of financial statements with more decision-useful information by addressing certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments simplify certain requirements and also reduce diversity in current practice for other requirements. ASU 2016-01 is effective for public companies' fiscal years beginning after December 15, 2017, which would be the Company's fiscal year ending March 30, 2019, including interim periods within those fiscal years. Except for the early application guidance specifically allowed in ASU 2016-01, early adoption is not permitted. We do not expect the adoption of ASU 2016-01 to have a material effect on our financial position, results of operations or cash flows. In November 2015, the FASB issued ASU 2015-17, "Income Taxes (Topic 740) - Balance Sheet Classification of Deferred Taxes." ASU 2015-17 simplifies the presentation of deferred income taxes, and requires that deferred tax liabilities and assets be classified as non-current in a classified statement of financial position. Early application is permitted and may be applied either prospectively to all deferred tax liabilities and assets or retrospectively to all periods presented. We elected to prospectively adopt ASU 2015-17, thus reclassifying an immaterial amount of current deferred tax assets net of valuation allowance to noncurrent on the accompanying consolidated balance sheet. In August 2015, the FASB issued ASU No. 2015-14, which defers the effective date of ASU No. 2014-09 "Revenue from Contracts with Customers" one year to interim and annual reporting periods beginning after December 15, 2017, which would be the Company's fiscal year ending March 30, 2019. This guidance may be adopted retrospectively or under a modified retrospective method where the cumulative effect is recognized at the date of initial application. The Company is currently evaluating the impact of adopting this guidance on its Consolidated Financial Statements and disclosures included within Notes to Consolidated Financial Statements. In July 2015, the FASB issued ASU 2015-11, “Simplifying the Measurement of Inventory (Topic 330).” ASU 2015-11 simplifies the accounting for the valuation of all inventory not accounted for using the last-in, first-out (“LIFO”) method by prescribing inventory be valued at the lower of cost and net realizable value. ASU 2015-11 is effective for public companies' annual periods, including interim periods within those fiscal years, beginning after December 15, 2016, which would be the Company's fiscal year ending March 31, 2018, on a prospective basis. Early adoption is permitted. We do not expect the adoption of ASU 2015-11 to have a material effect on our financial position, results of operations or cash flows. In April 2015, the FASB issued ASU 2015-05, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40).” ASU 2015-05 provides guidance regarding the accounting for a customer's fees paid in a cloud computing arrangement, specifically about whether a cloud computing arrangement includes a software license, and if so, how to account for the software license. ASU 2015-05 is effective for public companies' annual periods, including interim periods, beginning after December 15, 2015, which would be the Company's fiscal year ending April 1, 2017. Early adoption is permitted. We do not expect the adoption of ASU 2015-05 to have a material effect on our financial position, results of operations or cash flows. In June 2014, the FASB issued ASU No. 2014-12, "Compensation - Stock Compensation (Topic 718)." ASU No. 2014-12 addresses accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. ASU 2014-12 indicates that, in such situations, the performance target should be treated as a performance condition and, accordingly, the performance target should not be reflected in estimating the grant-date fair value of the award. Instead, compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved. ASU 2014-12 is effective for annual periods and interim periods within those annual periods beginning after December 15, 2015, which would be the Company's fiscal year ending April 1, 2017. We do not expect the adoption of ASU 2014-12 to have a material effect on our financial position, results of operations or cash flows. In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers". ASU No. 2014-09 requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance when it becomes effective. The new standard is effective for the Company on March 26, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Apr. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Share-Based Compensation The Company's employee share-based compensation plans consist of our 2004 Stock Incentive Plan (the 2004 Plan) and our 1990 Employee Stock Purchase Plan. Additionally, the Company recognizes compensation expense for shares issued in connection with business acquisition from an unallocated share pool, approved by the shareholders or the Board of Directors. The 2004 plan was approved by the shareholders in October 2004, replacing various stock compensation plans that were previously approved by the shareholders or the Board of Directors (the Replaced Plans), except with respect to options and other awards previously outstanding. Outstanding options and awards remained subject to the terms of the Replaced Plans under which they were originally granted. At that time, the shareholders also approved the reservation of 3,000,000 shares of common stock for issuance under the 2004 Plan. These shares are in addition to any shares of common stock that, at the time the 2004 Plan was approved by shareholders, were available for grant under any of the Replaced Plans through the expiration, termination, forfeiture or cancellation of grants. The 2004 Plan allows for grants of stock options, stock appreciation rights, stock bonuses (including restricted stock units), restricted stock, performance-based awards and dividend equivalents. In August 2014, the 2004 Plan was amended to reduce the shares reserved for issuance by 1,000,000 shares. In September 1990, the shareholders approved the adoption of the 1990 Employee Stock Purchase Plan, as amended in September 1998, October 2003, October 2004, January 2008, August 2009 and August 2014 (the ESPP), pursuant to which 4,400,000 shares of common stock have been reserved for issuance to participating employees. Eligible employees may elect to contribute up to 15 percent of their base wage and commissions during each pay period, up to a maximum of 500 shares per purchase date. The ESPP provides for separate overlapping twenty-four month offerings starting every three months. Each offering has eight purchase dates occurring every three months on designated dates. The offerings under the ESPP commence on February 15, May 15, August 15 and November 15 of each calendar year. Any eligible employee may participate in only one offering at a time and may purchase shares only through payroll deductions permitted under the ESPP. At the end of each three-month purchase period, the purchase price is determined and the accumulated funds are used to automatically purchase shares of common stock. The purchase price per share is equal to 85 percent of the lower of the fair market value of the common stock on (a) the first day of the offering period or (b) the date of purchase. The ESPP also provides that if the fair market value of the common stock on the first day of the new offering period is less than or equal to the fair market value of the common stock on the first date of any ongoing offering, employees participating in any such ongoing offering will be automatically withdrawn from it and enrolled in the new offering. SARs grant the right to receive shares of the Company’s stock equivalent to the increase in stock value of a specified number of shares over a specified period of time, divided by the stock price at the time of exercise. The Company uses the Black-Scholes model to estimate the fair value of SARs. Similar to options, SARs are recorded at the fair value of the award at grant date and the expense is recognized on a straight-line basis over the requisite service period of the award. The Company granted 467,000 , 634,523 , and 63,853 SARs in 2016 , 2015 and 2014 , respectively. Share-based compensation expense was included in the Company’s Consolidated Statements of Operations as follows: (In thousands) 2016 2015 2014 Cost of sales $ 445 $ 586 $ 722 Selling, general and administration 3,004 2,847 4,213 Research, development and engineering 783 1,109 1,170 Share-based compensation expense $ 4,232 $ 4,542 $ 6,105 The amounts shown in the table above for the year ended April 2, 2016 do not include $871 thousand in share-based compensation expense related to acquisitions. Refer to Note 6 "Business Acquisition" for discussion of stock amounts considered compensation related to acquisitions. The total amount of net cash received from the stock plan awards was $0.7 million , zero and $0.7 million for 2016 , 2015 and 2014 , respectively. All stock plan awards are settled with newly issued shares. No share-based compensation costs were capitalized during 2016 , 2015 or 2014. As of April 2, 2016 , the Company had $6.9 million of total unrecognized share-based compensation costs, net of estimated forfeitures, which are expected to be recognized over a weighted average period of 1.9 years . Valuation Assumptions The Black-Scholes option pricing model is utilized to determine the fair value of SARs granted. The following weighted average assumptions were used in calculating the fair value of SARs during the periods presented: 2016 2015 2014 Risk-free interest rate 1.94 % 2.04 % 1.88 % Expected dividend yield — % 4.6 % 3.5 % Expected lives 7.4 years 7.0 years 6.0 years Expected volatility 47 % 47 % 45 % The following weighted average assumptions were used to estimate the fair value of ESPP shares issued in the periods presented: 2016 2015 2014 Risk-free interest rate 0.34 % 0.24 % 0.16 % Expected dividend yield — % 3.2 % 3.3 % Expected lives 1.1 years 1.1 years 1.1 years Expected volatility 35 % 41 % 37 % The risk-free interest rates used are based on the U.S. Treasury yields over the expected terms. In December 2011, the Board of Directors adopted a dividend policy under which the Company made quarterly cash dividends payments. Accordingly, the Company paid a dividend of $0.08 per outstanding common share in first three quarters of 2015 and all four quarters of 2014. In the fourth quarter of 2015, the Board of Directors suspended the quarterly dividend payment and as such no dividends were paid in that quarter or any quarter of 2016. The expected dividend yield used is derived using a mathematical formula which uses the expected Company annual dividend rate over the expected term divided by the fair value of the Company’s common stock at the grant date. The expected term and forfeiture estimates for stock options and SARs are based on an analysis of actual exercise behavior. The expected term for the ESPP is the weighted average length of the purchase periods. The Company uses its historical volatility over the estimated expected term as the expected volatility. At April 2, 2016 , the Company had 5,099,015 shares of its common stock reserved for issuance under all of the above plans combined. Of those shares, 3,638,391 are subject to issuance under currently outstanding stock options, SARs and stock awards and 1,460,624 shares, including 622,276 shares available for issuance under the ESPP, are available for future grants. The total fair value of stock option and SARs awards granted and vested during the period, unvested restricted stock unit awards granted and vested during the period, the intrinsic value of stock options and SARs exercised during the period and the total grant date fair value were: (In thousands, except per share data) 2016 2015 2014 Stock-Option and SAR Awards: Grant date fair value per share $ 2.89 $ 2.12 $ 2.94 Total fair value of options and SARs granted $ 1,350 $ 1,291 $ 188 Total fair value of options and SARs vested $ 336 $ 409 $ 1,305 Total intrinsic value of options and SARs exercised $ 1 $ 18 $ 183 Unvested Restricted Stock Unit Awards: Grant date fair value per share $ 5.52 $ 6.80 $ 10.19 Total fair value of awards granted $ 4,072 $ 5,832 $ 6,865 Total fair value of awards vested $ 4,324 $ 7,532 $ 5,251 Employee Stock Purchase Plan: Grant date fair value per share $ 1.22 $ 1.72 $ 2.61 Total grant date fair value $ 394 $ 559 $ 699 Share-Based Payment Award Activity Information with respect to stock option and SAR activity was as follows: Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (In years) Aggregate Intrinsic Value (In thousands) Outstanding at March 30, 2013 2,773,788 $ 17.98 Granted 63,853 9.24 Exercised (46,350 ) 7.26 Expired or forfeited (892,882 ) 23.67 Outstanding at March 29, 2014 1,898,409 $ 15.27 3.76 $ 1,275 Granted 634,523 6.91 Exercised (8,250 ) 7.26 Expired or forfeited (295,636 ) 18.30 Outstanding at March 28, 2015 2,229,046 $ 12.52 4.45 $ — Granted 467,000 5.63 Exercised (2,500 ) 6.71 Expired or forfeited (537,946 ) 16.53 Outstanding at April 2, 2016 2,155,600 $ 10.03 5.35 $ 904 Vested and expected to vest at April 2, 2016 2,124,474 $ 10.09 5.30 $ 867 Exercisable at April 2, 2016 1,288,983 $ 12.54 3.06 $ 54 Information with respect to unvested time-based restricted stock unit awards activity was as follows: Shares Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (In years) Aggregate Intrinsic Value (In thousands) Outstanding at March 30, 2013 1,092,489 $ 12.19 Awarded 465,789 10.08 Vested (299,538 ) 11.84 Forfeited (143,139 ) 11.63 Outstanding at March 29, 2014 1,115,601 $ 11.47 1.65 $ 11,033 Awarded 459,295 6.33 Vested (672,930 ) 11.19 Forfeited (66,125 ) 9.82 Outstanding at March 28, 2015 835,841 $ 8.90 1.91 $ 5,149 Awarded 737,200 5.52 Vested (360,349 ) 11.75 Forfeited (130,888 ) 7.66 Outstanding at April 2, 2016 1,081,804 $ 6.77 1.93 $ 7,781 Information with respect to unvested performance-based restricted stock unit awards activity was as follows: Shares Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (In years) Aggregate Intrinsic Value (In thousands) Outstanding at March 30, 2013 372,527 $ 10.72 Awarded 213,662 10.45 Vested (1) (151,145 ) 11.29 Forfeited (38,511 ) 11.13 Outstanding at March 29, 2014 396,533 $ 10.33 1.51 $ 3,922 Awarded 398,905 7.33 Vested (1) (234 ) — Forfeited (201,500 ) 11.63 Outstanding at March 28, 2015 593,704 $ 7.88 1.81 $ 3,657 Awarded — — Vested (1) (5,592 ) 14.64 Forfeited (187,125 ) 10.84 Outstanding at April 2, 2016 400,987 $ 6.93 1.00 $ 2,928 (1) Zero performance-based shares were earned in 2016 , 2015 and 2014 . Share-Based Payment For Business Acquisitions As consideration for the purchase of Topwin, the Company is obligated to issue up to 513,328 shares valued at $2.0 million as compensation to an employee in the Company who was also a former shareholder of Topwin. The compensation expense will be recognized over a three year period. In 2016, the Company issued 59,887 shares of ESI common stock and recognized $0.9 million in compensation expense related to this agreement. See Note 6 "Business Acquisition” for discussion.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Apr. 02, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Financial Assets Measured at Fair Value The Company’s fair value hierarchy for its financial assets measured at fair value on a recurring basis as of April 2, 2016 and March 28, 2015 was as follows (in thousands): April 2, 2016 Level 1 Level 2 Level 3 Total Cash equivalents: Money market securities $ 4,643 $ — $ — $ 4,643 Commercial paper — 12,140 — 12,140 Total cash equivalents $ 4,643 $ 12,140 $ — $ 16,783 Short term investments - available for sale: U.S. treasury fund $ 1,003 $ — $ — $ 1,003 Government agencies — 13,252 — 13,252 Commercial paper — 997 — 997 Total short-term investments - available for sale $ 1,003 $ 14,249 $ — $ 15,252 Forward purchase or (sale) contracts: Japanese Yen $ — $ (31 ) $ — $ (31 ) New Taiwan Dollar — 5 — 5 Korean Won — 129 — 129 Euro — (367 ) — (367 ) Chinese Renminbi — (1 ) — (1 ) Singapore Dollar — 20 — 20 Total forward contracts $ — $ (245 ) $ — $ (245 ) Deferred compensation plan assets:* Mutual funds and exchange traded funds $ 1,916 $ — $ — $ 1,916 Money market securities 588 — — 588 Total deferred compensation plan assets $ 2,504 $ — $ — $ 2,504 *These investments represent assets held in trust for our deferred compensation plan March 28, 2015 Level 1 Level 2 Level 3 Total Cash equivalents: Money market securities $ 14,280 $ — $ — $ 14,280 Commercial paper — 15,537 — 15,537 Government agencies — 2,702 — 2,702 Total cash equivalents $ 14,280 $ 18,239 $ — $ 32,519 Short term investments - available for sale: Municipal bonds $ — $ 3,872 $ — $ 3,872 Corporate bonds — 853 — 853 Total short-term investments - available for sale $ — $ 4,725 $ — $ 4,725 Forward purchase or (sale) contracts: Japanese Yen $ — $ (7 ) $ — $ (7 ) New Taiwan Dollar — 17 — 17 Korean Won — (44 ) — (44 ) Euro — 277 — 277 British Pound — (133 ) — (133 ) Chinese Renminbi — (34 ) — (34 ) Total forward contracts $ — $ 76 $ — $ 76 Deferred compensation plan assets:* Mutual funds and exchange traded funds $ 1,885 $ — $ — $ 1,885 Money market securities 190 — — 190 Total deferred compensation plan assets $ 2,075 $ — $ — $ 2,075 *These investments represent assets held in trust for our deferred compensation plan For Level 1 assets, the Company utilized quoted prices in active markets for identical assets. For Level 2 assets, exclusive of forward contracts, the Company utilized quoted prices in active markets for similar assets. For forward contracts, spot prices at April 2, 2016 and March 28, 2015 were utilized to calculate fair values. During 2016 and 2015 , there were no transfers between Level 1, 2 or 3 assets. Investments The Company’s investments at April 2, 2016 and March 28, 2015 were as follows (in thousands): Unrealized April 2, 2016 Cost Gain Loss Fair Value Available-for-sale securities (current): Commercial paper $ 13,137 $ — $ — $ 13,137 Government agencies 13,247 5 — 13,252 Total investments (current) $ 26,384 $ 5 $ — $ 26,389 Available-for-sale securities (non-current): Mutual funds, exchange traded funds and money market securities* $ 2,507 $ — $ (3 ) $ 2,504 Total investments (non-current) $ 2,507 $ — $ (3 ) $ 2,504 Unrealized March 28, 2015 Cost Gain Loss Fair Value Available-for-sale securities (current): Commercial paper $ 15,537 $ — $ — $ 15,537 Municipal bonds 3,870 2 — 3,872 Government agencies 2,702 — — 2,702 Corporate bonds 853 — — 853 Mutual funds, exchange traded funds and money market securities* 1,950 125 — 2,075 Total investments (current) $ 24,912 $ 127 $ — $ 25,039 *These investments represent assets held in trust for our deferred compensation plan For purposes of determining gross realized gains and losses and reclassification out of accumulated other comprehensive income (loss), the cost of securities sold is based on specific identification. Net unrealized holding gains and losses on current available-for-sale securities included in accumulated other comprehensive income (loss) were insignificant as of April 2, 2016 and March 28, 2015 . Investments with underlying maturities within one year at April 2, 2016 , including cash equivalents, totaled $26.4 million .

Business Acquisitions

Business Acquisitions	12 Months Ended
	Apr. 02, 2016
Business Combinations [Abstract]
Business Acquisitions	Business Acquisition On January 15, 2015, the Company acquired all of the outstanding shares of Wuhan Topwin Optoelectronics Technology Co., Ltd. (Topwin), a Chinese manufacturer of laser-based systems, for $7.6 million in cash and 748,944 shares of ESI common stock issuable over a three year period, valued at approximately $2.9 million as of the acquisition date. Out of the $2.9 million in equity, one-half, or 374,472 shares, is contingent-based consideration and one-half, or 374,472 shares, is non-contingent and will be issued over a three year period beginning June 30, 2015. The contingent consideration is based on future performance of Topwin, as evaluated against targets for net income for each year over a three year period. One-third of the contingent shares will be issued after each year if the target is met for that year. However, failing to meet stated targets will result in none of the contingent shares being issued for that year. As of the acquisition date, the fair value of 374,472 shares of contingent consideration was estimated to be $0.4 million and the fair value of 374,472 shares of non-contingent consideration was estimated to be $2.5 million . The fair value of the non-contingent and contingent shares to be issued over the three year period was determined based on the estimated share price as of the issuance date derived through Monte Carlo simulation, discounted back to the acquisition date. The value of the contingent shares included an estimate of the probability of attainment of the net income targets. Analysis supporting the purchase price allocation included a valuation of assets and liabilities as of the closing date, an analysis of intangible assets and a detailed review of the opening balance sheet to determine other significant adjustments required to recognize assets and liabilities at fair value. Through fiscal 2016, zero and 87,378 shares of ESI common stock have been issued in connection with contingent and non-contingent consideration under the purchase agreement, respectively. Additionally, the Company will issue, on the same terms described above, approximately 513,328 shares valued at $2.0 million , which, together with cash amounts of $0.2 million , is treated as compensation to an employee in the Company who was also a former shareholder of Topwin. The compensation expense will be recognized over a three year period. Through fiscal 2016, we have recognized $1.0 million in compensation expense related to this agreement. This expense was comprised of $0.9 million of share-based compensation and $0.1 million amortization. Through fiscal 2016, zero and 59,887 shares of ESI common stock have been issued in connection with contingent and non-contingent components of compensation expense, respectively. The total purchase price of approximately $10.5 million , net of cash acquired, was allocated to the underlying assets acquired and liabilities assumed based on their fair values, as shown in the following table: (In thousands) Accounts receivable, net of allowances of $268 $ 454 Inventory 544 Prepaid expense and other current assets 295 Property, plant and equipment 23 Acquired intangibles 3,618 Goodwill 7,445 Accounts payable and other accrued liabilities (1,859 ) Total purchase price, net of cash acquired $ 10,520 The acquisition is expected to enable the Company to gain entry into the low total-cost-of-ownership solutions market in China and the goodwill of approximately $7.4 million recognized as a result of the acquisition was assigned to the Topwin reporting unit. The premium paid over the fair value of the individual assets acquired and liabilities assumed reflects the Company’s view that this acquisition was the result of a competitive bid process and has provided the Company with innovative design and manufacturing capabilities for laser-based manufacturing solutions across a variety of complementary applications, together with direct access to local China market, supply chain and opto-electronics knowledge center. None of the goodwill is expected to be deductible for tax purposes. As a result of the acquisition, the Company recorded approximately $4.9 million of identifiable assets, including $3.6 million of identifiable intangible assets, and $1.9 million of identifiable liabilities. The acquired intangible assets consist primarily of $3.5 million of developed technology and will be amortized over their useful lives, which range from one to ten years. In 2016 and 2015, the Company incurred approximately $0.2 million and $0.8 million in acquisition-related costs, respectively, which are included in selling, general and administration expenses in the Consolidated Statements of Operations. The operating results of this acquisition are included in the Company’s results of operations since the date of acquisition. Pro forma financial information has not been provided for the acquisition of Topwin as it is not material to the Company’s operations and overall financial position.

Trade Receivables, net (Notes)

Trade Receivables, net (Notes)	12 Months Ended
	Apr. 02, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	7. Trade Accounts Receivable Trade accounts receivable at April 2, 2016 and March 28, 2015 consisted of the following: (In thousands) 2016 2015 Current trade accounts receivable, net $ 42,770 $ 42,295 Non-current trade accounts receivable 320 3,656 $ 43,090 $ 45,951 Non-current trade accounts receivable are included in Other assets in the Condensed Consolidated Balance Sheets. Presentation of $3.7 million of non-current trade accounts receivable previously shown as current at March 28, 2015 was revised to reflect these amounts as non-current, which conforms to current period presentation.

Inventories

Inventories	12 Months Ended
	Apr. 02, 2016
Inventory Disclosure [Abstract]
Inventories	Inventories The components of inventories at April 2, 2016 and March 28, 2015 were as follows: (In thousands) 2016 2015 Raw materials and purchased parts $ 38,957 $ 37,991 Work-in-process 14,270 14,834 Finished goods 7,243 3,812 $ 60,470 $ 56,637 In 2016 and 2015 , the Company recorded a charge against inventory for write-offs associated with discontinued products of $1.4 million and $1.0 million , respectively. See Note 25 "Restructuring and Cost Management Plans" for further discussion on 2015 write-off.

Other Current Assets

Other Current Assets	12 Months Ended
	Apr. 02, 2016
Disclosure Other Current Assets [Abstract]
Other Current Assets	Other Current Assets Other current assets at April 2, 2016 and March 28, 2015 consisted of the following: (In thousands) 2016 2015 Prepaid expenses $ 2,747 $ 2,595 Value added tax receivable 1,353 802 Acquisition related receivable — 1,180 Other 1,240 1,513 $ 5,340 $ 6,090 Included in "Other" Other current assets are non-trade receivables, derivative sale proceeds receivable and other similar items.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Apr. 02, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment, net Property, plant and equipment as of April 2, 2016 and March 28, 2015 consisted of the following: (In thousands) Estimated Useful Lives 2016 2015 Land n/a $ 2,152 $ 2,152 Buildings and improvements 3 to 40 years 36,487 37,841 Machinery and equipment 3 to 10 years 57,986 53,781 Computer equipment and software 1 to 7 years 35,828 34,985 132,453 128,759 Less accumulated depreciation (107,910 ) (102,901 ) $ 24,543 $ 25,858 Depreciation expense totaled $6.8 million, $7.2 million and $7.1 million in 2016 , 2015 and 2014 , respectively. For the year ended April 2, 2016 , the Company performed a review for impairment based on certain triggering events. As a result of this review, no impairments of property, plant and equipment were identified.

Goodwill

Goodwill	12 Months Ended
	Apr. 02, 2016
Goodwill Disclosure [Abstract]
Goodwill Disclosure Text Block	Goodwill The Company had $7.4 million and $7.7 million in goodwill as of April 2, 2016 and March 28, 2015 , respectively, which was associated with the Topwin reporting unit. Purchase price accounting was finalized in the first quarter of 2016, which reduced goodwill by $0.3 million, due primarily to a lower purchase price resulting from working capital adjustments in accordance with the purchase agreement. The Company tests goodwill for impairment annually or more frequently if an event occurs or circumstances would indicate that it is more likely than not the fair value of the reporting unit is less than the carrying value. The date of the annual test of goodwill for the Topwin reporting unit is the first day of the fourth quarter. Accordingly, the Company performed a step one analysis of the recorded goodwill as of January 3, 2016, and the reporting unit fair value was determined to be greater than the carrying value, indicating no impairment. See Note 6 "Business Acquisition" for further discussion on Topwin goodwill.

Acquired Intangible Assets

Acquired Intangible Assets	12 Months Ended
	Apr. 02, 2016
Intangible Assets Disclosure [Abstract]
Acquired Intangible Assets	Acquired Intangible Assets, net Acquired intangible assets as of April 2, 2016 and March 28, 2015 consisted of the following: (In thousands, except years) Weighted Average Useful Life (In years) 2016 2015 Developed technology 7.1 $ 19,457 $ 20,001 Customer relationships 5.6 3,154 3,154 Customer backlog 1.0 1,341 1,341 Trade name and trademarks 3 463 463 Fair value of below-market lease (non-current portion) 3.8 310 310 Change of control agreements 1 100 100 Patents 13.0 3,467 3,469 28,292 28,838 Less accumulated amortization (21,146 ) (19,880 ) $ 7,146 $ 8,958 We performed a review of our acquired intangible assets in the fourth quarter of 2016 , including a review for impairment based on certain triggering events and no significant impairments of intangible assets were detected, other than a $0.4 million intangible associated with developed technology related to the Topwin reporting unit. Amortization expense for acquired intangible assets has been recorded on the Consolidated Statements of Operations as follows: (In thousands) 2016 2015 2014 Cost of sales $ 1,140 $ 1,095 $ 2,293 Selling, general and administration 36 210 212 Research, development and engineering 200 197 480 $ 1,376 $ 1,502 $ 2,985 The estimated amortization expense for acquired intangible assets in future years is as follows (in thousands): Year Amortization 2017 $ 1,089 2018 1,087 2019 1,087 2020 1,035 2021 1,012 Future years 1,836 $ 7,146

Other Assets

Other Assets	12 Months Ended
	Apr. 02, 2016
Disclosure Other Assets [Abstract]
Other Assets	Other Assets Other assets consisted of the following as of April 2, 2016 and March 28, 2015 : (In thousands) 2016 2015 Consignment and demo equipment, net $ 7,242 $ 7,164 Long term deposits 2,543 2,376 Non-current trade accounts receivable, net 320 3,656 Other non-current assets 2,521 15 $ 12,626 $ 13,211 Depreciation expense for demo equipment totaled $0.5 million in 2016 and $0.6 million in each of 2015 and 2014.

Income Taxes

Income Taxes	12 Months Ended
	Apr. 02, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes During the fourth quarter of 2016, we elected to prospectively adopt ASU 2015-17, thus reclassifying $0.2 million of current DTAs net of valuation allowance to noncurrent on the accompanying consolidated balance sheet. Net deferred tax assets and liabilities at April 2, 2016 and March 28, 2015 consisted of the following: (In thousands) 2016 2015 Deferred tax assets and liabilities: Current Inventory valuation and warranty costs $ — $ 10,781 Receivables and other current assets — (272 ) Payroll-related accruals — 1,288 Accrued liabilities — 2,382 Deferred revenue — 3,368 Other — 1,029 Total current deferred tax assets — 18,576 Valuation allowance, current — (18,571 ) Net current deferred tax assets (liabilities) — 5 Non-current Inventory valuation and warranty costs 11,524 — Receivables and other non-current assets (91 ) — Payroll-related accruals 6,035 4,704 Intangible assets and investments 865 (1,677 ) Accrued liabilities 1,626 454 Deferred revenue 1,746 — Property, plant and equipment 5,220 5,187 Other comprehensive income 219 (112 ) Tax loss and credit carryforwards 67,630 59,137 Other assets (219 ) 1,049 Total non-current deferred tax assets 94,555 68,742 Valuation allowance, non-current (93,875 ) (69,011 ) Net non-current deferred tax (liabilities) assets 680 (269 ) Total deferred tax assets 94,555 87,318 Total valuation allowance (93,875 ) (87,582 ) Net deferred tax (liabilities) assets $ 680 $ (264 ) The Company had approximately $77.9 million and $68.5 million in tax assets resulting from federal, state and foreign net operating losses and tax credits as of April 2, 2016 and March 28, 2015 , respectively as follows: (In thousands) 2016 2015 Federal net operating losses $ 27,430 $ 19,785 State net operating losses 3,467 3,467 Foreign operating losses and tax credits 12,173 11,433 Federal research credits 21,336 19,670 State research credits 4,480 4,287 Federal minimum tax credit 990 1,049 Federal capital losses 8,022 8,855 $ 77,898 $ 68,546 The federal and state net operating losses expire on various dates through fiscal 2036. The majority of the foreign tax credits expire on various dates through fiscal 2026. The federal and most of the state research credits expire on various dates through fiscal 2036. Certain state research credits and the federal minimum tax credits are available indefinitely. The state net operating losses and credits are reflected net of their federal tax impact. A valuation allowance is required if it is more likely than not that all or a part of a deferred tax asset will not be realized in the future. A valuation allowance of $93.9 million and $87.6 million was recorded as of April 2, 2016 and March 28, 2015 , respectively. The valuation allowance increased by $6.3 million in 2016 primarily due to continued net operating losses and tax credits. The components of income before income taxes and the (benefit from) provision for income taxes, all from continuing operations, were as follows: (In thousands) 2016 2015 2014 Income (loss) before income taxes: Domestic $ (13,385 ) $ (39,656 ) $ (37,739 ) Foreign 1,112 (3,921 ) (687 ) Total loss before income taxes (12,273 ) (43,577 ) (38,426 ) Provision for (benefit from) income taxes: Current: U.S. federal and state 8 (983 ) (605 ) Foreign 916 1,205 437 924 222 (168 ) Deferred: U.S. federal and state — 5 (26 ) Foreign (940 ) 7 102 (940 ) 12 76 Total provision for (benefit from) income taxes $ (16 ) $ 234 $ (92 ) The portion of the tax benefit derived from stock-based compensation that is allocated as common stock was zero in 2016 , 2015 and 2014 . A reconciliation of the Company’s effective tax rate to the United States federal statutory income tax rate was as follows: 2016 2015 2014 U.S. federal statutory income tax rate 35.0 % 35.0 % 35.0 % State income taxes, net of federal benefit (0.5 ) (1.1 ) (0.6 ) Tax credits 17.1 4.2 3.0 Domestic production and export tax incentives — — — Non-U.S. income taxed at different rates 14.3 2.1 3.3 Changes in unrecognized tax benefits (4.1 ) (2.4 ) 2.1 Change in valuation allowance (51.8 ) (32.3 ) (38.0 ) Stock compensation (10.2 ) (4.2 ) (4.1 ) Other, net 0.3 (2.0 ) (0.5 ) 0.1 % (0.7 )% 0.2 % The Company currently benefit from a tax incentive program in Singapore pursuant to which we pay no Singapore income tax with respect to our manufacturing income. The incentive period ends on June 30, 2016. While the Company has failed to meet certain of the associated requirements for the incentive in the past, it has obtained a waiver for certain periods and believes that it is more likely than not the Company will continue to receive the associated tax incentives for balance of the incentive period. Although the Company has applied for an extension of benefits beyond the incentive period, there is no assurance that these benefits will be extended. The Company operates globally but considers its significant tax jurisdictions to include Canada, China, France, Japan, Korea, Singapore, Taiwan, the United Kingdom and the United States. As of April 2, 2016 , the following tax years remained subject to examination by the major tax jurisdictions indicated: Major Jurisdictions Open Tax Years Canada 2012 and forward China 2006 and forward France 2013 and forward Japan 2009 and forward Korea 2011 and forward Singapore 2012 and forward Taiwan 2011 and forward United Kingdom 2012 and forward United States 2004 and forward A reconciliation of the beginning and ending amount of the consolidated liability for unrecognized income tax benefits for the years ended April 2, 2016 and March 28, 2015 was as follows: (In thousands) 2016 2015 2014 Beginning unrecognized tax benefits balance $ 9,654 $ 9,356 $ 9,210 Gross increases for tax positions of prior years 731 849 44 Gross decreases for tax positions of prior years — (1,013 ) — Gross increases for tax positions for current year — 462 102 Ending unrecognized tax benefits balance $ 10,385 $ 9,654 $ 9,356 The unrecognized tax benefits were presented as long-term income taxes payable on the Consolidated Balance Sheets net of offsetting deferred tax assets. If recognized the net impact to the effective tax rate associated with the unrecognized tax benefits would be $0.2 million and $0.2 million as of April 2, 2016 and March 28, 2015 , respectively. The Company records interest and penalties related to unrecognized tax benefits as tax expense. The interest and penalties were minimal in 2016 and 2015 . The Company expects no decrease in unrecognized tax benefits within the next twelve months from the lapse in statutes of limitation. The Company also expects the annual increases to be consistent with prior years and does not anticipate any significant changes in unrecognized tax benefits in the next twelve months as the result of examinations.

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Apr. 02, 2016
Disclosure Accrued Liabilities [Abstract]
Accrued Liabilities	Accrued Liabilities (current) & Other Liabilities (non-current) Accrued liabilities (current) consisted of the following at April 2, 2016 and March 28, 2015 : (In thousands) 2016 2015 Payroll-related liabilities $ 5,717 $ 6,723 Product warranty accrual 3,666 3,342 Purchase order commitments and receipts 2,588 1,815 Customer deposits 1,731 1,057 Professional fees payable 1,052 1,237 Restructuring and cost management amounts payable 757 1,997 Freight accrual 538 171 Value added taxes payable 388 474 Income taxes payable 181 83 Other current liabilities 1,716 1,767 $ 18,334 $ 18,666 Included in other liabilities above are accrued amounts for customer deposits, value-added taxes, freight, income taxes, and other similar items. Other liabilities (non-current) consisted of the following: (In thousands) 2016 2015 Deferred compensation $ 2,504 $ — Product warranty accrual 2,068 — Other non-current liabilities 3,229 1,571 $ 7,801 $ 1,571 Other non-current liabilities include long-term deferred revenue, long-term deposits, and other similar items. Presentation of $1.6 million of Other non-current liabilities previously shown as current at March 28, 2015 was revised to reflect these amounts as non-current, which conforms to current period presentation.

Product Warranty

Product Warranty	12 Months Ended
	Apr. 02, 2016
Product Warranties Disclosures [Abstract]
Product Warranty	Product Warranty The following is a reconciliation of the changes in the aggregate product warranty accrual for 2016 , 2015 and 2014 : (In thousands) 2016 2015 2014 Product warranty accrual, beginning $ 3,342 $ 4,215 $ 5,411 Warranty charges incurred, net (7,781 ) (6,468 ) (7,178 ) Provision for warranty charges 10,173 5,595 5,982 Product warranty accrual, ending $ 5,734 $ 3,342 $ 4,215 Net warranty charges incurred include labor charges and costs of replacement parts for system repairs under warranty. These costs are recorded net of any estimated cost recoveries resulting from either successful repair of damaged parts or from warranties offered by the Company’s suppliers for defective components. The provision for warranty charges reflects the estimate of future anticipated net warranty costs to be incurred for all products under warranty at fiscal year-end and is recorded to cost of sales. Of the total of $5.7 million in product warranty accrual at April 2, 2016 , $2.1 million is non-current and is included in Other liabilities on the Condensed Consolidated Balance Sheets.

Deferred Revenue

Deferred Revenue	12 Months Ended
	Apr. 02, 2016
Deferred Revenue Disclosure [Abstract]
Deferred Revenue	Deferred Revenue The following is a reconciliation of the changes in deferred revenue for 2016 , 2015 and 2014 : (In thousands) 2016 2015 2014 Deferred revenue, beginning $ 12,376 $ 10,515 $ 10,196 Revenue deferred 58,416 46,139 34,594 Revenue recognized (63,107 ) (44,278 ) (34,275 ) Deferred revenue, ending $ 7,685 $ 12,376 $ 10,515 Of the total of $7.7 million in deferred revenue at April 2, 2016 , $1.3 million is non-current and is included in Other liabilities on the Condensed Consolidated Balance Sheets.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Apr. 02, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments The Company enters into derivative financial instruments on a limited basis and does not use them for trading purposes. It does, however, use derivatives to manage well-defined foreign currency risks. The Company hedges material non-functional currency monetary asset and liability balances. Foreign exchange contract gains and losses are recognized at the end of each fiscal period in the Company’s results of operations. Such gains and losses are typically offset by the corresponding changes to the related underlying hedged item. Cash flows from derivative financial instruments are classified in the same category as the cash flows from the items hedged. At April 2, 2016 and March 28, 2015 , the Company had net forward exchange contracts to purchase foreign currencies totaling $13.1 million and $2.8 million , respectively. In general, these contracts mature in less than six months and the counterparties are large, highly rated banks; therefore, the Company believes that the risk of loss as a result of nonperformance by the banks is minimal. The table below summarizes, by currency, the notional amounts of forward exchange contracts in U.S. dollars as of April 2, 2016 and March 28, 2015 . The “bought” amounts represent the net U.S. dollar equivalents of commitments to purchase foreign currencies, and the “sold” amounts represent the net U.S. dollar equivalents of commitments to sell foreign currencies. The foreign currency amounts have been translated into a U.S. dollar equivalent value using the exchange rates as of April 2, 2016 and March 28, 2015 . Bought (Sold) (In thousands) 2016 2015 Japanese Yen $ 5,079 $ 4,263 Euro 12,073 10,354 New Taiwan Dollar (117 ) (831 ) Korean Won 197 (3,000 ) British Pound (2,350 ) (2,906 ) Chinese Renminbi (1,859 ) (4,278 ) Singapore Dollar 53 (598 ) Canadian Dollar — (159 ) $ 13,076 $ 2,845

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Apr. 02, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The aggregate minimum commitment obligation under operating leases beyond April 2, 2016 was as follows (in thousands): Year Operating 2017 $ 3,032 2018 2,344 2019 1,589 2020 215 2021 132 Thereafter — $ 7,312 The Company leases certain equipment, automobiles, manufacturing and office space under operating leases, which are non-cancelable and expire on various dates through fiscal 2021. Rental expense for all operating leases was $2.5 million , $2.7 million and $2.8 million in 2016 , 2015 and 2014 , respectively. The operating lease amounts include our contractual facilities lease obligation at our Chelmsford, Massachusetts plant, excluding the estimated rental income from the sub lease of this facility . The operations at Chelmsford manufacturing plant ceased in the third quarter of 2016 as a part of the Company’s plan to streamline its manufacturing and development activities. In the third quarter of 2016, we entered into a sublease for this property and the associated estimated rental income of $0.5 million over the three year life of the lease partially offsets the Company's ongoing lease obligation. See Note 25 "Restructuring and Cost Management Plans" for further discussion on Chelmsford plant closure plan. The Company routinely enters into inventory purchase contracts which require purchase commitments. As a result, if we experience lower than anticipated demand for our products, in many cases we would not be able to avoid the cost of purchasing the associated inventory, which could negatively impact our results of operations and liquidity. The Company had purchase commitments of $21.6 million at April 2, 2016 , of which $0.3 million represent long term purchase contracts. In the normal course of business, the Company agrees to indemnify customers with respect to certain matters. The Company has agreed, under certain conditions, to hold these third parties harmless against specified losses, such as those arising from other third party claims that the Company’s products, when used for their intended purposes, infringe the intellectual property rights of such other third parties. To date, the Company has not recorded any material charges related to these types of obligations. We mitigate credit risk by transacting with highly rated counterparties for foreign exchange contracts, letters of credit and other transactions where counterparty risk is a factor. We have evaluated the non-performance risks associated with our lenders and other parties and believe them to be insignificant. From time to time we may be party to litigation arising in the normal course of business. Currently we are not party to any litigation we believe would have a material adverse effect on our financial position, results of operations, or cash flows.

Loan Agreement (Notes)

Loan Agreement (Notes)	12 Months Ended
	Apr. 02, 2016
Line of Credit Facility [Line Items]
Debt Disclosure [Text Block]	Loan Agreement In March 2015, the Company entered into a loan and security agreement ("Loan Agreement") with Silicon Valley Bank ("SVB"), as lender. The Loan Agreement provides for a senior secured asset-based revolving credit facility (the “Credit Facility”) with up to $30 million available on a revolving basis, including a $15 million sublimit for letters of credit, until March 20, 2018. Borrowings under the Credit Facility may be used for working capital needs and other general corporate purposes. The Credit Facility has three levels of reporting, pricing, and availability based on the Company’s liquidity and certain borrowing base valuations of the Company’s eligible accounts receivable. Amounts outstanding under the Credit Facility will bear interest at a rate per annum equal to, at the election of the Company, the LIBOR rate or Wall Street Journal prime rate, plus an additional interest rate margin that is determined by the availability of borrowings under the Loan Agreement. The additional interest rate margin will range from 2.0% to 2.75% in the case of LIBOR advances and from zero percent to 0.5% for prime rate advances. During an event of default, amounts due under the Loan Agreement will bear interest at a rate per annum equal to 5% above the rate otherwise applicable to such amounts. The Company paid SVB a commitment fee of $75,000 on execution of the Loan Agreement and will be required to pay $12,500 per annum thereafter, and is required to pay a quarterly unused facility fee equal to 0.30% - 0.50% per annum of the average daily unused portion of the commitments under the Credit Facility, depending upon availability of borrowings under the Credit Facility. At April 2, 2016 , we had no revolving loans or letters of credit outstanding under our Credit Facility, we were in compliance with all covenants, and were not in default under the Loan Agreement. While we have a credit facility in place, the level of availability and cost are based on maintaining certain levels of qualified receivables and domestic cash. As a result, if either of these balances decreases significantly, our ability to access the facility may be limited or costs may be higher. In addition, if we fail to meet the covenants in our credit facility, including the tangible net worth covenant, the facility may not be available to us.

(Loss) Earnings Per Share

(Loss) Earnings Per Share	12 Months Ended
	Apr. 02, 2016
Earnings Per Share [Abstract]
(Loss) Earnings Per Share	Loss Per Share The following was a reconciliation of weighted average shares outstanding used in the calculation of basic and diluted earnings per share for 2016 , 2015 and 2014 : (In thousands, except per share data) 2016 2015 2014 Net loss $ (12,257 ) $ (43,811 ) $ (38,334 ) Weighted average shares used for basic earnings per share 31,411 30,611 29,974 Incremental diluted shares — — — Weighted average shares used for diluted earnings per share 31,411 30,611 29,974 Net loss per share: Net loss—basic $ (0.39 ) $ (1.43 ) $ (1.28 ) Net loss—diluted $ (0.39 ) $ (1.43 ) $ (1.28 ) Awards of options, SARs and unvested restricted stock units representing an additional 2.3 million , 2.9 million and 3.8 million shares of stock for 2016 , 2015 and 2014 , respectively, were not included in the calculation of diluted net earnings per share because their effect would have been antidilutive.

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Apr. 02, 2016
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity Share Repurchase Program In December 2011, the Board of Directors authorized a share repurchase program totaling $20.0 million to acquire shares of our outstanding common stock. The repurchases are to be made at management’s discretion in the open market or in privately negotiated transactions in compliance with applicable securities laws and other legal requirements and are subject to market conditions, share price and other factors. The Company did not repurchase any shares during 2016 . In 2015, the Company repurchased 207,738 shares for $1.5 million under this authorization at an average price of $7.01 per share, calculated inclusive of commissions and fees. In 2014, the Company repurchased 19,832 shares for $0.2 million at an average price of $9.65 per share, calculated inclusive of commissions and fees. Cash used to settle repurchase transactions is reflected as a component of cash used in financing activities on the Consolidated Statements of Cash Flows. There is no fixed completion date for the repurchase program. Dividends In February 2015, the Board of Directors suspended the quarterly dividend which was adopted by the Company in December 2011. The Company paid aggregate dividends of $7.3 million and $9.6 million in 2015 and 2014, respectively. We did not pay any dividends in 2016.

Legal Proceedings

Legal Proceedings	12 Months Ended
	Apr. 02, 2016
Disclosure Legal Proceedings [Abstract]
Legal Proceedings	Legal Proceedings In the ordinary course of business, we are involved in various legal matters, either asserted or unasserted, and investigations. In the opinion of management, ultimate resolution of these matters will not have a material effect on our consolidated financial position, results of operations or cash flows.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Apr. 02, 2016
Segment Reporting [Abstract]
Product and Geographic Information	Segment and Geographic Information Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or decision making group, in deciding how to allocate resources and in assessing performance. Our chief operating decision maker is our Chief Executive Officer. During 2016, we operated in two segments, Component Processing and Micromachining. Included within Component Processing are interconnect products, semiconductor products and component test products. The interconnect, semiconductor and component test products are sold primarily to manufacturers of electronic components and are used to drill, cut, trim, ablate, test and mark features that improve the yield or functionality of the component. Micromachining products are sold primarily to manufacturers of end devices across multiple industries and are used primarily to drill, cut or mark features on a variety of materials, generally on the casing or external surface of the end device. In addition, micromachining products tend to serve markets that require fewer features, less stringent design requirements, and lower cost. The Company uses Generally Accepted Account Principles ("GAAP") accounting for segment reporting consistent with the accounting policies of the consolidated entity. Refer to footnote 2. Summary of Significant Accounting Policies for more information. Segment disclosures are presented to the gross profit level as this is the primary performance measure for which the segment management are responsible. Corporate and other charges include amortization of acquired intangible assets, stock-based compensation, restructuring and other costs. Selling, general and administrative and other operating expenses are managed at the functional and corporate levels, and because allocation to the market segments would be arbitrary, have not been allocated to the market segments. See the consolidated statements of operations for reconciliations from gross profit to income before taxes. These reconciling items are not included in the measure of profit and loss for each reportable segment. Net sales by segment were as follows: (In thousands) 2016 2015 2014 Component Processing $ 152,284 $ 124,598 $ 141,401 Micromachining 32,107 34,520 39,766 $ 184,391 $ 159,118 $ 181,167 Gross profits by segment were as follows: (In thousands) 2016 2015 2014 Component Processing $ 66,693 $ 50,970 $ 63,914 Micromachining 9,386 6,383 12,175 Corporate and other (3,376 ) (2,672 ) (16,218 ) $ 72,703 $ 54,681 $ 59,871 Net sales by geographic area, based on the location of the end user, were as follows: (In thousands) 2016 2015 2014 Asia $ 152,259 $ 124,049 $ 136,336 Americas 21,206 18,067 31,596 Europe 10,926 17,002 13,235 $ 184,391 $ 159,118 $ 181,167 Long-lived assets, exclusive of investments and net deferred tax assets, by geographic area were as follows: (In thousands) 2016 2015 Americas $ 26,359 $ 28,606 Asia 17,318 19,775 Europe 5,579 5,960 $ 49,256 $ 54,341 The amounts shown for 2015 long-lived assets by geographic area have been revised to include the Goodwill impairment recorded and included in results from operations in the fourth quarter of 2015.

Restructuring and Cost Manageme

Restructuring and Cost Management Plans	12 Months Ended
	Apr. 02, 2016
Restructuring and Related Activities [Abstract]
Restructuring and Cost Management Plans	Restructuring and Cost Management Plans In March 2015, as a part of the plan to streamline manufacturing and development activities, the Company initiated a restructuring plan that included the closure of the assembly plant and development center located in Chelmsford, Massachusetts, which was part of our Component Processing segment. The original estimated completion date of the plan was the end of fiscal 2016 at a total estimated pre-tax cost of $5.5 million . Net restructuring costs related to the above mentioned restructuring plan were $2.8 million in 2016 and $3.0 million in 2015. Included in these costs were write-offs of leasehold improvements associated with the abandoned manufacturing facility, employee severance and related payments, inventory write-off charges associated with discontinued products and other wind-down costs. As of April 2, 2016, most of the restructuring activities have been completed, and we expect to pay the accrued expenses primarily related to severance and employee benefits in the first quarter of 2017. At April 2, 2016 and March 28, 2015, the amount of unpaid restructuring costs included in accrued liabilities on the Consolidated Balance Sheets was $0.8 million and $2.0 million , respectively. Included in the payable balance are amounts for severance and employee benefits, asset retirement obligation and net lease commitments. The following table presents the amounts related to restructuring and cost management amounts payable (in thousands): Restructuring & cost management amounts payable as of March 30, 2013 $ 485 Cash payments and other adjustments (204 ) Costs incurred 769 Restructuring & cost management amounts payable as of March 29, 2014 1,050 Cash payments and other adjustments (985 ) Costs incurred 1,932 Restructuring & cost management amounts payable as of March 28, 2015 1,997 Cash payments and other adjustments (4,064 ) Costs incurred 2,824 Restructuring & cost management amounts payable as of April 2, 2016 $ 757

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Apr. 02, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	Quarterly Financial Information (Unaudited) (In thousands, except per share data) 1 st Quarter 2 nd Quarter 3 rd Quarter 4 th Quarter Year Ended April 2, 2016 Net sales Systems $ 32,062 $ 35,570 $ 31,282 $ 44,043 Service 11,029 10,902 12,060 7,443 Total net sales 43,091 46,472 43,342 51,486 Cost of sales: Systems 21,285 22,345 20,292 25,247 Service 6,429 5,706 5,329 5,055 Total cost of sales 27,714 28,051 25,621 30,302 Gross profit 15,377 18,421 17,721 21,184 Net (loss) income (6,364 ) (3,260 ) (4,586 ) 1,953 Basic net (loss) income per share (0.20 ) (0.10 ) (0.15 ) 0.06 Diluted net (loss) income per share (0.20 ) (0.10 ) (0.15 ) 0.06 Dividends per outstanding common share Declared $ — $ — $ — $ — Paid $ — $ — $ — $ — Year Ended March 28, 2015 Net sales Systems $ 23,424 $ 30,273 $ 31,750 $ 26,156 Service 11,606 12,583 11,911 11,415 Total net sales 35,030 42,856 43,661 37,571 Cost of sales: Systems 16,934 20,742 22,031 18,488 Service 5,808 7,349 6,917 6,168 Total cost of sales 22,742 28,091 28,948 24,656 Gross profit 12,288 14,765 14,713 12,915 Net loss (8,251 ) (6,243 ) (6,376 ) (22,941 ) Basic net loss per share (0.27 ) (0.20 ) (0.21 ) (0.75 ) Diluted net loss per share (0.27 ) (0.20 ) (0.21 ) (0.75 ) Dividends per outstanding common share Declared $ 0.08 $ 0.08 $ 0.08 $ — Paid $ 0.08 $ 0.08 $ 0.08 $ — The sum of the quarterly data presented in the table above for fiscal 2016 and 2015 may not equal annual results due to rounding. 1. In the fourth quarter of 2016, gross profit included $0.4 million of charges for intangible write-off related to discontinued products. 2. In each of the second, third and fourth quarters of 2016, net loss included $0.6 million , $1.9 million and $0.2 million of restructuring charges related to the Chelmsford, Massachusetts restructuring plan. Second quarter charge included $1.1 million of asset write-off due to the closure of the Chelmsford, Massachusetts manufacturing plant. 3. In the third quarter of 2016, gross profit included $1.4 million of charges for inventory write-offs related to discontinued products. 4. In the first and second quarters of 2016, net loss included $0.2 million and $0.1 million of acquisition and integration charges related to Topwin. 5. In the fourth quarter of 2015, gross profit included $1.0 million of charges for inventory write-offs related to the Chelmsford, Massachusetts restructuring plan. 6. In the fourth quarter of 2015, net operating expenses included a non-cash goodwill impairment charge of $7.9 million to write down the goodwill to its implied fair value as of March 28, 2015 , a $2.0 million restructuring cost related to the Chelmsford, Massachusetts restructuring plan, primarily consisting of employee severance and related costs. 7. In each of the third and fourth quarters of 2015, net loss included $0.3 million and $0.5 million of acquisition and integration charges related to Topwin. 8. In the fourth quarter of 2015, net loss included a loss on a cost method investment of $4.3 million and a $0.6 million gain on liquidation of a foreign subsidiary.

Subsequent Events

Subsequent Events	12 Months Ended
	Apr. 02, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events The Company has evaluated subsequent events from the statement of assets, liabilities and shareholders' equity date through the date at which the financial statements were available to be issued, and determined there are no other items to disclose.

Summary of Significant Accoun37

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Apr. 02, 2016
Accounting Policies [Abstract]
Basis of presentation	The accompanying consolidated financial statements include the accounts of Electro Scientific Industries, Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated. The Company’s fiscal year consists of 52 or 53 weeks ending on the Saturday nearest March 31. Accordingly, the fiscal 2016 reporting period consisted of a 53 -week period ending on April 2, 2016 , the fiscal 2015 reporting period consisted of a 52 -week period ending on March 28, 2015 and the fiscal 2014 reporting period consisted of a 52 -week period ending on March 29, 2014 . All references to years or quarters relate to fiscal years or fiscal quarters unless otherwise noted.
Estimates	The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of commitments and contingencies at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results may differ from those estimates. Management believes that the estimates used are reasonable. Significant estimates made by management include: revenue recognition; inventory valuation; product warranty reserves; allowance for doubtful accounts; accrued restructuring costs; share-based compensation; income taxes including the valuation of deferred tax assets; fair value measurements; valuation of long-lived assets; and valuation of goodwill.
Net foreign investment exposure	The Company’s net investment exposure in foreign subsidiaries translated into U.S. dollars using the period-end exchange rates at April 2, 2016 and March 28, 2015 was approximately $56.9 million and $64.3 million, respectively. The potential loss in fair value resulting from a hypothetical 10% adverse change in foreign exchange rates would be approximately $5.7 million and $6.4 million at April 2, 2016 and March 28, 2015 , respectively. Foreign exchange rate gains or losses on foreign investments as of April 2, 2016 were reflected as a cumulative translation adjustment, net of tax, and do not affect the Company’s results of operations.
Cash equivalents	All highly liquid investments with a maturity of 90 days or less at the date of purchase are considered to be cash equivalents.
Investments	Short-term investments reflect marketable securities that have maturities of less than one year or are subject to immediate pre-payment or call provisions. These securities consist primarily of marketable debt securities and are classified as “available-for-sale securities” and recorded at fair market value. Unrealized gains and losses on short-term investments are recorded as a component of accumulated other comprehensive income (loss). To determine whether any existing impairment is other-than-temporary and requires recognition of an impairment loss in the results of operations, the Company evaluates its marketable securities based on the nature of the investments and the Company’s intent and ability to hold the securities until the securities are no longer in an unrealized loss position.
Accounts receviable and allowance for doubtful accounts	Trade receivables are stated at the amount the Company expects to collect and do not bear interest. Credit limits are established by reviewing the financial history and stability of each customer. Where appropriate, the Company obtains credit rating reports and financial statements of the customer to establish or modify credit limits. On certain foreign sales, letters of credit are obtained. The collectability of trade receivable balances is regularly evaluated based on a combination of factors such as customer reputation and credit-worthiness, past transaction history with the customer, current economic and industry trends, and changes in customer payment terms. If it is determined or estimated that a customer will be unable to fully meet its financial obligation, such as in the case of a bankruptcy filing or other material events impacting its business, a specific allowance for bad debt is recorded to reduce the related receivable to the amount expected to be recovered.
Accrued restructuring costs	The Company has engaged, and may continue to engage, in restructuring actions, which require it to make estimates in certain areas including expenses for severance and other employee separation costs. Because the Company has a history of paying severance benefits, expenses associated with exit or disposal activities are recognized when probable and estimable. Should the actual amounts differ from our estimates, the amount of the restructuring charges could be materially impacted. See Note 25 “Restructuring and Cost Management Plans” for further discussion.
Inventories	Inventories are principally valued at standard costs, which approximate the lower of cost (first-in, first-out) or market. Costs utilized for inventory valuation purposes include material, labor and manufacturing overhead
Shipped systems pending acceptance	Shipped systems pending acceptance relate to systems that have been ordered and shipped to the customer, but where revenue has been deferred in accordance with the Company’s revenue recognition policy. Shipped systems pending acceptance are recognized as cost of sales once all criteria for revenue recognition have been met and revenue is recorded. Shipped systems pending acceptance are valued at standard costs, which approximate the lower of cost (first-in, first-out) or market. Costs utilized in the valuation of shipped systems pending acceptance include material, labor and manufacturing overhead and exclude costs of installation.
Property, plant and equipment	Property, plant and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization are recognized using the straight-line basis over the estimated useful lives of the assets. Expenditures for maintenance, repairs and minor improvements are expensed as incurred. Major improvements and additions are capitalized. When assets are sold or retired, the cost and related accumulated depreciation and amortization are removed from the accounts and the resulting gain or loss is included as a component of operating expenses.
Long-lived asset impairment and amortization	Long-lived assets, principally property, plant and equipment and identifiable long-lived intangibles, are reviewed for impairment whenever events or circumstances indicate that the carrying amount of the assets may not be recoverable. The Company evaluates for recoverability of assets to be held and used by comparing the carrying amount of an asset or asset group to estimated future net undiscounted cash flows generated by the asset. If such assets are considered to be impaired, the impairment recognized is measured as the amount by which the carrying amount of the assets exceeds the fair value of the assets. The Company’s purchased patents are amortized over their estimated useful lives, generally nine to seventeen years. Other purchased intangible assets with estimated useful lives are carried at cost less accumulated amortization. Amortization expense is recognized on a straight-line basis over the estimated useful lives of the intangible assets, which range from one to ten years.
Goodwill impairment	The Company accounts for goodwill pursuant to Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 350 as amended in September 2011 by Accounting Standard Update (ASU) 2011-08, “Intangibles-Goodwill and Other (ASC Topic 350): Testing Goodwill for Impairment” (ASC ASU 2011-08). ASC Topic 350 requires that goodwill be tested for impairment at least annually. ASC ASU 2011-08 permits an entity to make a qualitative assessment of whether it is more likely than not that a reporting units' fair value is less than its carrying amount (a "step zero" analysis) before applying the two-step goodwill impairment test. The Company tests goodwill for impairment annually or more frequently if an event occurs or circumstances would indicate that it is more likely than not the fair value of the reporting unit is less than the carrying value. In the current year, the Company did not elect to perform a step zero and proceeded with a step one analysis of the goodwill related to the Topwin reporting unit. The date of the annual test of goodwill is the first day of the fourth quarter. The carrying value of the reporting unit is determined based on an allocation of the Company's assets and liabilities to the reporting unit using reasonable assumptions. If potential impairment is indicated by the step one test, the Company performs a step two test to determine the fair value of goodwill.
Cost method investments
Fair value of financial instruments	The carrying amounts of financial instruments, including cash equivalents and accrued liabilities approximate fair value because of the nature of the underlying transactions and short-term maturities involved. Current and non-current marketable securities are recorded at fair value which is defined under FASB ASC Topic 820 “Fair Value Measurements and Disclosures” (ASC Topic 820).
Derivative financial instruments	The Company’s primary objective for holding derivative financial instruments is to manage currency risk. The Company’s accounting policies for these instruments are based on whether they meet the Company’s criteria for designation as hedging transactions, either as cash flow or fair value hedges. A hedge of the exposure to variability in the cash flows of an asset or a liability, or of a forecasted transaction, is referred to as a cash flow hedge. A hedge of the exposure to changes in fair value of an asset or a liability, or of an unrecognized firm commitment, is referred to as a fair value hedge. The criteria for designating a derivative as a hedge include the instrument’s effectiveness in risk reduction and, in most cases, a one-to-one matching of the derivative instrument to its underlying transaction. The Company enters into foreign currency exchange contracts to offset the earnings impact relating to the variability in exchange rates on certain short-term monetary assets and liabilities denominated in non-functional currencies. The Company does not designate these foreign currency contracts as hedges. The change in fair value of these derivative instruments not designated as hedging instruments is reported each period in other income (expense), net, in our Consolidated Statement of Operations.
Revenue recognition	The Company sells a significant portion of its products to a small number of large semiconductor, PCB's and microelectronics manufacturers. The top ten customers accounted for approximately 51% , 40% and 41% of total net sales in 2016 , 2015 and 2014 , respectively. One customer, Apple Inc., and its affiliates, accounted for approximately 15% , 9% and 15% of total net sales in 2016 , 2015 and 2014 , respectively, a majority of which are in the Micromachining products group. No other customer individually accounted for more than 10% of total net sales in 2016 , 2015 or 2014 . The Company’s operating results may be adversely affected if orders and revenues from these key customers decline. The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred or the services have been rendered, the sales price is fixed or determinable and collection of the related receivable is reasonably assured. Title and risk of loss generally pass to the customer at the time of delivery of the product to a common carrier. Revenue is recognized upon such delivery, provided that fulfillment of acceptance criteria can be demonstrated prior to shipment. Where the acceptance criteria cannot be demonstrated prior to shipment, or in the case of substantially new products, revenue is deferred until acceptance has been received. For multiple element arrangements, the relative fair value of any undelivered elements is deferred until the elements are delivered and acceptance criteria, if any, are met. Revenues are recorded net of taxes collected which are required to be submitted to government authorities. Installation services are not essential to the functionality of the delivered equipment and installation revenue is deferred as a separate deliverable until installation is complete. Neither accrued installation costs nor the fair value of installation service revenue deferred has been material. Revenues associated with sales to customers under local contracts in Japan are recognized upon title transfer, which generally occurs upon customer acceptance. Revenues related to spare parts and consumable sales are generally recognized upon shipment. Revenues related to maintenance and service contracts are generally recognized ratably over the duration of the contracts.
Product warranty	The Company evaluates obligations related to product warranties quarterly. A standard warranty is provided on most of our products over a specified period of time, generally twelve to twenty-four months, at no cost to our customers. Warranty charges are comprised of costs to service the warranty, including labor to repair the system and replacement parts for defective items, as well as other costs incidental to the repairs. Warranty charges are recorded net of any cost recoveries resulting from either successful repair of damaged parts or from warranties offered by the Company’s suppliers for defective components. Using historical data, the Company estimates average warranty cost per system or part type and records the provision for such charges as an element of cost of sales upon recognition of the related revenue. Additionally, the overall warranty accrual balance is separately analyzed using the remaining warranty periods outstanding on systems and items under warranty, and any resulting changes in estimates are recorded as an adjustment to cost of sales. If circumstances change, or if a significant change in warranty-related incidents occurs, the impact of the change in the warranty accrual could be material. Accrued product warranty is included on the Consolidated Balance Sheets as a component of accrued liabilities.
Research and development	Research and development costs, which include labor and related employee expenses, patent maintenance fees, project materials costs, development tool placement and installation costs, project subcontractors, depreciation of engineering equipment, building costs and other administration expenses, are generally expensed as incurred. Engineering materials that are expected to provide future value are included in inventories.
Taxes on unremitted foreign income	The Company provides for income taxes on its foreign subsidiaries’ taxable income based on the effective income tax rate in each respective jurisdiction. The Company provides for deferred taxes on the undistributed earnings of a subsidiary, except to the extent that the income is intended to be indefinitely reinvested or remitted in a tax-free liquidation. The foreign jurisdictions where the Company is permanently reinvested include Singapore and China (Wuhan Topwin Optoelectronics Technology Co., Ltd.). The cumulative amount of earnings upon which U.S. income taxes have not been provided was $37.0 million and $35.3 million as of April 2, 2016 and March 28, 2015 , respectively. If not reinvested, the liability related to these earnings would have been $12.9 million and $12.2 million as of April 2, 2016 and March 28, 2015 , respectively
Comprehensive income (loss)	Comprehensive income (loss) includes net income (loss) and other comprehensive income (loss), which includes charges or credits to equity that are not the result of transactions with shareholders. Comprehensive income (loss) within these consolidated financial statements includes primarily cumulative foreign currency translation adjustments, benefit plan obligations and unrealized gains and losses on securities available for sale. The cumulative translation adjustment included in accumulated other comprehensive income (loss) at April 2, 2016 , March 28, 2015 and March 29, 2014 was $0.9 million , $30 thousand , and $0.4 million respectively.
Earnings per share	Basic earnings per share (EPS) is computed utilizing the weighted average number of shares outstanding during the period. Diluted EPS also considers common stock equivalents, such as stock options, stock-settled stock appreciation rights (SARs), employee stock purchase plan (ESPP) shares and restricted stock units, to the extent that they are not antidilutive.
Share-based compensation	The Company recognizes expense related to the fair value of its share-based compensation awards. The Company uses the Black-Scholes model to estimate the fair value of all share-based compensation awards on the date of grant, except for unvested restricted stock units, which are valued at the fair market value of the Company’s stock on the date of award. The Company recognizes the compensation expense for options, SARs, and unvested time-based restricted stock units on a straight-line basis, net of estimated forfeitures, over the requisite service period of the award.
Segment reporting	The Company complies with ASC Topic 280 “Segment Reporting” (ASC Topic 280). ASC Topic 280, which is based on a management approach to segment reporting, establishes requirements to report selected segment information quarterly and to report annually entity-wide disclosures about products, major customers and the geographies in which the entity holds material assets and reports revenue. An operating segment is defined as a component that engages in business activities whose operating results are reviewed by the chief operating decision maker and for which discrete financial information is available. Based on the provisions of ASC Topic 280, the Company has determined that it operates in two segments: Component Processing and Micromachining. There are no differences between the accounting policies used for our business segments compared to those used on a consolidated basis.
Employee benefit plans	The Company has an employee savings plan under the provisions of Section 401(k) of the Internal Revenue Code. During 2016 and 2015 , contributions to the plan by the Company were $0.7 million and $0.6 million, respectively. The Company has defined benefit retirement plans at certain of its foreign subsidiaries. The Company accounts for these plans based on the provisions of ASC Topic 715 “Compensation-Retirement Benefits”.

Other Assets Other Assets (Poli

Other Assets Other Assets (Policies)	12 Months Ended
	Apr. 02, 2016
Other Assets [Abstract]
Consignment Demo And Training Equipment [Policy Text Block]	Consignment, demo and training equipment are recorded at the lower of standard costs or estimated market values, until the assets are sold.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Apr. 02, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based compensation expense	Share-based compensation expense was included in the Company’s Consolidated Statements of Operations as follows: (In thousands) 2016 2015 2014 Cost of sales $ 445 $ 586 $ 722 Selling, general and administration 3,004 2,847 4,213 Research, development and engineering 783 1,109 1,170 Share-based compensation expense $ 4,232 $ 4,542 $ 6,105
Fair value assumptions of options and SARs granted	The Black-Scholes option pricing model is utilized to determine the fair value of SARs granted. The following weighted average assumptions were used in calculating the fair value of SARs during the periods presented: 2016 2015 2014 Risk-free interest rate 1.94 % 2.04 % 1.88 % Expected dividend yield — % 4.6 % 3.5 % Expected lives 7.4 years 7.0 years 6.0 years Expected volatility 47 % 47 % 45 %
Fair value assumptions for ESPP	The following weighted average assumptions were used to estimate the fair value of ESPP shares issued in the periods presented: 2016 2015 2014 Risk-free interest rate 0.34 % 0.24 % 0.16 % Expected dividend yield — % 3.2 % 3.3 % Expected lives 1.1 years 1.1 years 1.1 years Expected volatility 35 % 41 % 37 %
Summary of awards	The total fair value of stock option and SARs awards granted and vested during the period, unvested restricted stock unit awards granted and vested during the period, the intrinsic value of stock options and SARs exercised during the period and the total grant date fair value were: (In thousands, except per share data) 2016 2015 2014 Stock-Option and SAR Awards: Grant date fair value per share $ 2.89 $ 2.12 $ 2.94 Total fair value of options and SARs granted $ 1,350 $ 1,291 $ 188 Total fair value of options and SARs vested $ 336 $ 409 $ 1,305 Total intrinsic value of options and SARs exercised $ 1 $ 18 $ 183 Unvested Restricted Stock Unit Awards: Grant date fair value per share $ 5.52 $ 6.80 $ 10.19 Total fair value of awards granted $ 4,072 $ 5,832 $ 6,865 Total fair value of awards vested $ 4,324 $ 7,532 $ 5,251 Employee Stock Purchase Plan: Grant date fair value per share $ 1.22 $ 1.72 $ 2.61 Total grant date fair value $ 394 $ 559 $ 699
Stock option activity	Information with respect to stock option and SAR activity was as follows: Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (In years) Aggregate Intrinsic Value (In thousands) Outstanding at March 30, 2013 2,773,788 $ 17.98 Granted 63,853 9.24 Exercised (46,350 ) 7.26 Expired or forfeited (892,882 ) 23.67 Outstanding at March 29, 2014 1,898,409 $ 15.27 3.76 $ 1,275 Granted 634,523 6.91 Exercised (8,250 ) 7.26 Expired or forfeited (295,636 ) 18.30 Outstanding at March 28, 2015 2,229,046 $ 12.52 4.45 $ — Granted 467,000 5.63 Exercised (2,500 ) 6.71 Expired or forfeited (537,946 ) 16.53 Outstanding at April 2, 2016 2,155,600 $ 10.03 5.35 $ 904 Vested and expected to vest at April 2, 2016 2,124,474 $ 10.09 5.30 $ 867 Exercisable at April 2, 2016 1,288,983 $ 12.54 3.06 $ 54
Restricted stock activity	Information with respect to unvested time-based restricted stock unit awards activity was as follows: Shares Weighted Average Grant Date Fair Value Weighted Average Remaining Contractual Term (In years) Aggregate Intrinsic Value (In thousands) Outstanding at March 30, 2013 1,092,489 $ 12.19 Awarded 465,789 10.08 Vested (299,538 ) 11.84 Forfeited (143,139 ) 11.63 Outstanding at March 29, 2014 1,115,601 $ 11.47 1.65 $ 11,033 Awarded 459,295 6.33 Vested (672,930 ) 11.19 Forfeited (66,125 ) 9.82 Outstanding at March 28, 2015 835,841 $ 8.90 1.91 $ 5,149 Awarded 737,200 5.52 Vested (360,349 ) 11.75 Forfeited (130,888 ) 7.66 Outstanding at April 2, 2016 1,081,804 $ 6.77 1.93 $ 7,781

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Apr. 02, 2016
Fair Value Disclosures [Abstract]
Fair Value Hierarchy for Financial Assets Measured at Fair Value on Recurring Basis	Financial Assets Measured at Fair Value The Company’s fair value hierarchy for its financial assets measured at fair value on a recurring basis as of April 2, 2016 and March 28, 2015 was as follows (in thousands): April 2, 2016 Level 1 Level 2 Level 3 Total Cash equivalents: Money market securities $ 4,643 $ — $ — $ 4,643 Commercial paper — 12,140 — 12,140 Total cash equivalents $ 4,643 $ 12,140 $ — $ 16,783 Short term investments - available for sale: U.S. treasury fund $ 1,003 $ — $ — $ 1,003 Government agencies — 13,252 — 13,252 Commercial paper — 997 — 997 Total short-term investments - available for sale $ 1,003 $ 14,249 $ — $ 15,252 Forward purchase or (sale) contracts: Japanese Yen $ — $ (31 ) $ — $ (31 ) New Taiwan Dollar — 5 — 5 Korean Won — 129 — 129 Euro — (367 ) — (367 ) Chinese Renminbi — (1 ) — (1 ) Singapore Dollar — 20 — 20 Total forward contracts $ — $ (245 ) $ — $ (245 ) Deferred compensation plan assets:* Mutual funds and exchange traded funds $ 1,916 $ — $ — $ 1,916 Money market securities 588 — — 588 Total deferred compensation plan assets $ 2,504 $ — $ — $ 2,504 *These investments represent assets held in trust for our deferred compensation plan March 28, 2015 Level 1 Level 2 Level 3 Total Cash equivalents: Money market securities $ 14,280 $ — $ — $ 14,280 Commercial paper — 15,537 — 15,537 Government agencies — 2,702 — 2,702 Total cash equivalents $ 14,280 $ 18,239 $ — $ 32,519 Short term investments - available for sale: Municipal bonds $ — $ 3,872 $ — $ 3,872 Corporate bonds — 853 — 853 Total short-term investments - available for sale $ — $ 4,725 $ — $ 4,725 Forward purchase or (sale) contracts: Japanese Yen $ — $ (7 ) $ — $ (7 ) New Taiwan Dollar — 17 — 17 Korean Won — (44 ) — (44 ) Euro — 277 — 277 British Pound — (133 ) — (133 ) Chinese Renminbi — (34 ) — (34 ) Total forward contracts $ — $ 76 $ — $ 76 Deferred compensation plan assets:* Mutual funds and exchange traded funds $ 1,885 $ — $ — $ 1,885 Money market securities 190 — — 190 Total deferred compensation plan assets $ 2,075 $ — $ — $ 2,075 *These investments represent assets held in trust for our deferred compensation plan
Investments	April 2, 2016 and March 28, 2015 were as follows (in thousands): Unrealized April 2, 2016 Cost Gain Loss Fair Value Available-for-sale securities (current): Commercial paper $ 13,137 $ — $ — $ 13,137 Government agencies 13,247 5 — 13,252 Total investments (current) $ 26,384 $ 5 $ — $ 26,389 Available-for-sale securities (non-current): Mutual funds, exchange traded funds and money market securities* $ 2,507 $ — $ (3 ) $ 2,504 Total investments (non-current) $ 2,507 $ — $ (3 ) $ 2,504 Unrealized March 28, 2015 Cost Gain Loss Fair Value Available-for-sale securities (current): Commercial paper $ 15,537 $ — $ — $ 15,537 Municipal bonds 3,870 2 — 3,872 Government agencies 2,702 — — 2,702 Corporate bonds 853 — — 853 Mutual funds, exchange traded funds and money market securities* 1,950 125 — 2,075 Total investments (current) $ 24,912 $ 127 $ — $ 25,039

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Apr. 02, 2016
Inventory Disclosure [Abstract]
Components of Inventories	The components of inventories at April 2, 2016 and March 28, 2015 were as follows: (In thousands) 2016 2015 Raw materials and purchased parts $ 38,957 $ 37,991 Work-in-process 14,270 14,834 Finished goods 7,243 3,812 $ 60,470 $ 56,637

Other Current Assets (Tables)

Other Current Assets (Tables)	12 Months Ended
	Apr. 02, 2016
Disclosure Other Current Assets [Abstract]
Other Current Assets	Other current assets at April 2, 2016 and March 28, 2015 consisted of the following: (In thousands) 2016 2015 Prepaid expenses $ 2,747 $ 2,595 Value added tax receivable 1,353 802 Acquisition related receivable — 1,180 Other 1,240 1,513 $ 5,340 $ 6,090

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Apr. 02, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment as of April 2, 2016 and March 28, 2015 consisted of the following: (In thousands) Estimated Useful Lives 2016 2015 Land n/a $ 2,152 $ 2,152 Buildings and improvements 3 to 40 years 36,487 37,841 Machinery and equipment 3 to 10 years 57,986 53,781 Computer equipment and software 1 to 7 years 35,828 34,985 132,453 128,759 Less accumulated depreciation (107,910 ) (102,901 ) $ 24,543 $ 25,858

Acquired Intangible Assets (Tab

Acquired Intangible Assets (Tables)	12 Months Ended
	Apr. 02, 2016
Intangible Assets Disclosure [Abstract]
Schedule of Finite and Indefinite Lived Intangible Assets	Acquired intangible assets as of April 2, 2016 and March 28, 2015 consisted of the following: (In thousands, except years) Weighted Average Useful Life (In years) 2016 2015 Developed technology 7.1 $ 19,457 $ 20,001 Customer relationships 5.6 3,154 3,154 Customer backlog 1.0 1,341 1,341 Trade name and trademarks 3 463 463 Fair value of below-market lease (non-current portion) 3.8 310 310 Change of control agreements 1 100 100 Patents 13.0 3,467 3,469 28,292 28,838 Less accumulated amortization (21,146 ) (19,880 ) $ 7,146 $ 8,958
Schedule of Components of Amortization Expense	Amortization expense for acquired intangible assets has been recorded on the Consolidated Statements of Operations as follows: (In thousands) 2016 2015 2014 Cost of sales $ 1,140 $ 1,095 $ 2,293 Selling, general and administration 36 210 212 Research, development and engineering 200 197 480 $ 1,376 $ 1,502 $ 2,985
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The estimated amortization expense for acquired intangible assets in future years is as follows (in thousands): Year Amortization 2017 $ 1,089 2018 1,087 2019 1,087 2020 1,035 2021 1,012 Future years 1,836 $ 7,146

Other Assets (Tables)

Other Assets (Tables)	12 Months Ended
	Apr. 02, 2016
Other Assets, Noncurrent Disclosure [Abstract]
Other Assets	Other assets consisted of the following as of April 2, 2016 and March 28, 2015 : (In thousands) 2016 2015 Consignment and demo equipment, net $ 7,242 $ 7,164 Long term deposits 2,543 2,376 Non-current trade accounts receivable, net 320 3,656 Other non-current assets 2,521 15 $ 12,626 $ 13,211

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Apr. 02, 2016
Income Tax Disclosure [Abstract]
Components of net deferred tax assets	Net deferred tax assets and liabilities at April 2, 2016 and March 28, 2015 consisted of the following:
Components of income tax expense and provision for income taxes	The components of income before income taxes and the (benefit from) provision for income taxes, all from continuing operations, were as follows: (In thousands) 2016 2015 2014 Income (loss) before income taxes: Domestic $ (13,385 ) $ (39,656 ) $ (37,739 ) Foreign 1,112 (3,921 ) (687 ) Total loss before income taxes (12,273 ) (43,577 ) (38,426 ) Provision for (benefit from) income taxes: Current: U.S. federal and state 8 (983 ) (605 ) Foreign 916 1,205 437 924 222 (168 ) Deferred: U.S. federal and state — 5 (26 ) Foreign (940 ) 7 102 (940 ) 12 76 Total provision for (benefit from) income taxes $ (16 ) $ 234 $ (92 )
Reconciliation of effective tax rate	A reconciliation of the Company’s effective tax rate to the United States federal statutory income tax rate was as follows: 2016 2015 2014 U.S. federal statutory income tax rate 35.0 % 35.0 % 35.0 % State income taxes, net of federal benefit (0.5 ) (1.1 ) (0.6 ) Tax credits 17.1 4.2 3.0 Domestic production and export tax incentives — — — Non-U.S. income taxed at different rates 14.3 2.1 3.3 Changes in unrecognized tax benefits (4.1 ) (2.4 ) 2.1 Change in valuation allowance (51.8 ) (32.3 ) (38.0 ) Stock compensation (10.2 ) (4.2 ) (4.1 ) Other, net 0.3 (2.0 ) (0.5 ) 0.1 % (0.7 )% 0.2 %
Tax years subject to examination	As of April 2, 2016 , the following tax years remained subject to examination by the major tax jurisdictions indicated: Major Jurisdictions Open Tax Years Canada 2012 and forward China 2006 and forward France 2013 and forward Japan 2009 and forward Korea 2011 and forward Singapore 2012 and forward Taiwan 2011 and forward United Kingdom 2012 and forward United States 2004 and forward
Rollforward of unrecognized income tax benefits	A reconciliation of the beginning and ending amount of the consolidated liability for unrecognized income tax benefits for the years ended April 2, 2016 and March 28, 2015 was as follows: (In thousands) 2016 2015 2014 Beginning unrecognized tax benefits balance $ 9,654 $ 9,356 $ 9,210 Gross increases for tax positions of prior years 731 849 44 Gross decreases for tax positions of prior years — (1,013 ) — Gross increases for tax positions for current year — 462 102 Ending unrecognized tax benefits balance $ 10,385 $ 9,654 $ 9,356

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Apr. 02, 2016
Disclosure Accrued Liabilities [Abstract]
Accrued Liabilities	Accrued liabilities (current) consisted of the following at April 2, 2016 and March 28, 2015 : (In thousands) 2016 2015 Payroll-related liabilities $ 5,717 $ 6,723 Product warranty accrual 3,666 3,342 Purchase order commitments and receipts 2,588 1,815 Customer deposits 1,731 1,057 Professional fees payable 1,052 1,237 Restructuring and cost management amounts payable 757 1,997 Freight accrual 538 171 Value added taxes payable 388 474 Income taxes payable 181 83 Other current liabilities 1,716 1,767 $ 18,334 $ 18,666 Included in other liabilities above are accrued amounts for customer deposits, value-added taxes, freight, income taxes, and other similar items. Other liabilities (non-current) consisted of the following: (In thousands) 2016 2015 Deferred compensation $ 2,504 $ — Product warranty accrual 2,068 — Other non-current liabilities 3,229 1,571 $ 7,801 $ 1,571 Other non-current liabilities include long-term deferred revenue, long-term deposits, and other similar items. Presentation of $1.6 million of Other non-current liabilities previously shown as current at March 28, 2015 was revised to reflect these amounts as non-current, which conforms to current period presentation.

Product Warranty (Tables)

Product Warranty (Tables)	12 Months Ended
	Apr. 02, 2016
Product Warranties Disclosures [Abstract]
Reconciliation of the Change in Aggregate Accrual for Product Warranty	The following is a reconciliation of the changes in the aggregate product warranty accrual for 2016 , 2015 and 2014 : (In thousands) 2016 2015 2014 Product warranty accrual, beginning $ 3,342 $ 4,215 $ 5,411 Warranty charges incurred, net (7,781 ) (6,468 ) (7,178 ) Provision for warranty charges 10,173 5,595 5,982 Product warranty accrual, ending $ 5,734 $ 3,342 $ 4,215

Deferred Revenue (Tables)

Deferred Revenue (Tables)	12 Months Ended
	Apr. 02, 2016
Deferred Revenue Disclosure [Abstract]
Reconciliation of the Changes in Deferred Revenue	The following is a reconciliation of the changes in deferred revenue for 2016 , 2015 and 2014 : (In thousands) 2016 2015 2014 Deferred revenue, beginning $ 12,376 $ 10,515 $ 10,196 Revenue deferred 58,416 46,139 34,594 Revenue recognized (63,107 ) (44,278 ) (34,275 ) Deferred revenue, ending $ 7,685 $ 12,376 $ 10,515

Derivative Financial Instrume50

Derivative Financial Instruments (Tables)	12 Months Ended
	Apr. 02, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	Bought (Sold) (In thousands) 2016 2015 Japanese Yen $ 5,079 $ 4,263 Euro 12,073 10,354 New Taiwan Dollar (117 ) (831 ) Korean Won 197 (3,000 ) British Pound (2,350 ) (2,906 ) Chinese Renminbi (1,859 ) (4,278 ) Singapore Dollar 53 (598 ) Canadian Dollar — (159 ) $ 13,076 $ 2,845

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Apr. 02, 2016
Commitments and Contingencies Disclosure [Abstract]
Aggregate commitments under operating leases	The aggregate minimum commitment obligation under operating leases beyond April 2, 2016 was as follows (in thousands): Year Operating 2017 $ 3,032 2018 2,344 2019 1,589 2020 215 2021 132 Thereafter — $ 7,312

(Loss) Earnings Per Share (Tabl

(Loss) Earnings Per Share (Tables)	12 Months Ended
	Apr. 02, 2016
Earnings Per Share [Abstract]
Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted Earnings Per Share	The following was a reconciliation of weighted average shares outstanding used in the calculation of basic and diluted earnings per share for 2016 , 2015 and 2014 : (In thousands, except per share data) 2016 2015 2014 Net loss $ (12,257 ) $ (43,811 ) $ (38,334 ) Weighted average shares used for basic earnings per share 31,411 30,611 29,974 Incremental diluted shares — — — Weighted average shares used for diluted earnings per share 31,411 30,611 29,974 Net loss per share: Net loss—basic $ (0.39 ) $ (1.43 ) $ (1.28 ) Net loss—diluted $ (0.39 ) $ (1.43 ) $ (1.28 )

Segment and Geographic Inform53

Segment and Geographic Information (Tables)	12 Months Ended
	Apr. 02, 2016
Segment Reporting [Abstract]
Net sales by segment	Net sales by segment were as follows: (In thousands) 2016 2015 2014 Component Processing $ 152,284 $ 124,598 $ 141,401 Micromachining 32,107 34,520 39,766 $ 184,391 $ 159,118 $ 181,167
Gross profit (loss) by segments	Gross profits by segment were as follows: (In thousands) 2016 2015 2014 Component Processing $ 66,693 $ 50,970 $ 63,914 Micromachining 9,386 6,383 12,175 Corporate and other (3,376 ) (2,672 ) (16,218 ) $ 72,703 $ 54,681 $ 59,871
Net sales by geographic area, based on location of end user
Long-lived assets by geographic area	Long-lived assets, exclusive of investments and net deferred tax assets, by geographic area were as follows: (In thousands) 2016 2015 Americas $ 26,359 $ 28,606 Asia 17,318 19,775 Europe 5,579 5,960 $ 49,256 $ 54,341

Restructuring and Cost Manage54

Restructuring and Cost Management Plans (Tables)	12 Months Ended
	Apr. 02, 2016
Restructuring and Related Activities [Abstract]
Amounts Related to Restructuring Costs Payable	The following table presents the amounts related to restructuring and cost management amounts payable (in thousands): Restructuring & cost management amounts payable as of March 30, 2013 $ 485 Cash payments and other adjustments (204 ) Costs incurred 769 Restructuring & cost management amounts payable as of March 29, 2014 1,050 Cash payments and other adjustments (985 ) Costs incurred 1,932 Restructuring & cost management amounts payable as of March 28, 2015 1,997 Cash payments and other adjustments (4,064 ) Costs incurred 2,824 Restructuring & cost management amounts payable as of April 2, 2016 $ 757

Quarterly Financial Informati55

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Apr. 02, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of quarterly financial information	(In thousands, except per share data) 1 st Quarter 2 nd Quarter 3 rd Quarter 4 th Quarter Year Ended April 2, 2016 Net sales Systems $ 32,062 $ 35,570 $ 31,282 $ 44,043 Service 11,029 10,902 12,060 7,443 Total net sales 43,091 46,472 43,342 51,486 Cost of sales: Systems 21,285 22,345 20,292 25,247 Service 6,429 5,706 5,329 5,055 Total cost of sales 27,714 28,051 25,621 30,302 Gross profit 15,377 18,421 17,721 21,184 Net (loss) income (6,364 ) (3,260 ) (4,586 ) 1,953 Basic net (loss) income per share (0.20 ) (0.10 ) (0.15 ) 0.06 Diluted net (loss) income per share (0.20 ) (0.10 ) (0.15 ) 0.06 Dividends per outstanding common share Declared $ — $ — $ — $ — Paid $ — $ — $ — $ — Year Ended March 28, 2015 Net sales Systems $ 23,424 $ 30,273 $ 31,750 $ 26,156 Service 11,606 12,583 11,911 11,415 Total net sales 35,030 42,856 43,661 37,571 Cost of sales: Systems 16,934 20,742 22,031 18,488 Service 5,808 7,349 6,917 6,168 Total cost of sales 22,742 28,091 28,948 24,656 Gross profit 12,288 14,765 14,713 12,915 Net loss (8,251 ) (6,243 ) (6,376 ) (22,941 ) Basic net loss per share (0.27 ) (0.20 ) (0.21 ) (0.75 ) Diluted net loss per share (0.27 ) (0.20 ) (0.21 ) (0.75 ) Dividends per outstanding common share Declared $ 0.08 $ 0.08 $ 0.08 $ — Paid $ 0.08 $ 0.08 $ 0.08 $ —

Summary of Significant Accoun56

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Significant Accounting Policies [Line Items]
Net investment in foreign subsidiaries	$ 64,300	$ 56,900	$ 64,300
Potential loss due to 10% adverse change in foreign exchange rates	6,400	5,700	6,400
Cumulative translation adjustment	0	(900)	0
Contributions to 401(k) during the period		700	600
Other than temporary impairment of cost based investments	$ 4,300	$ 0	$ 4,263	$ 9,703
Top ten customers | Net sales
Significant Accounting Policies [Line Items]
Customer concentration risk, percentage		51.00%	40.00%	41.00%
Individually significant customer | Net sales
Significant Accounting Policies [Line Items]
Customer concentration risk, percentage		15.00%	9.00%	15.00%
Minimum | Patents
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets		9 years
Minimum | Other intangible assets
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets		1 year
Maximum | Patents
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets		17 years
Maximum | Other intangible assets
Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets		10 years
Omni Guide, Inc. | Class D Preferred Stock
Significant Accounting Policies [Line Items]
Minority equity investment
Omni Guide, Inc. | Class E Preferred Stock
Significant Accounting Policies [Line Items]
Minority equity investment
SINGAPORE
Significant Accounting Policies [Line Items]
Cumulative amount of earnings upon which U.S. income taxes have not been provided	$ 35,300	$ 37,000	$ 35,300
Unrecognized deferred tax liability	$ 12,200	$ 12,900	$ 12,200

Share-Based Compensation - Expe

Share-Based Compensation - Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 4,232	$ 4,542	$ 6,105
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	445	586	722
Selling, General and Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	3,004	2,847	4,213
Research and Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total share-based compensation expense	$ 783	$ 1,109	$ 1,170

Share-Based Compensation - Valu

Share-Based Compensation - Valuation Assumptions (Details) - $ / shares	3 Months Ended					12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividends paid per common share	$ 0	$ 0.08	$ 0.08	$ 0.08	$ 0.08
2004 plan | Options and SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate						1.94%	2.04%	1.88%
Expected dividend yield						0.00%	4.60%	3.50%
Expected lives						7 years 5 months 8 days	7 years	6 years
Expected volatility						47.00%	47.00%	45.00%
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate						0.34%	0.24%	0.16%
Expected dividend yield						0.00%	3.20%	3.30%
Expected lives						1 year 22 days	1 year 1 month 6 days	1 year 1 month 6 days
Expected volatility						35.00%	41.00%	37.00%

Share-Based Compensation - Summ

Share-Based Compensation - Summary of Awards (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Options and SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value per share	$ 2.89	$ 2.12	$ 2.94
Total grant date fair value	$ 1,350	$ 1,291	$ 188
Total fair value of awards vested	336	409	1,305
Total intrinsic value	$ 1	$ 18	$ 183
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value per share	$ 5.52	$ 6.80	$ 10.19
Total grant date fair value	$ 4,072	$ 5,832	$ 6,865
Total fair value of awards vested	$ 4,324	$ 7,532	$ 5,251
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value per share	$ 1.22	$ 1.72	$ 2.61
Total grant date fair value	$ 394	$ 559	$ 699

Share-Based Compensation - Shar

Share-Based Compensation - Share Based Payment Award Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	400,987	593,704	396,533	372,527
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 6.93	$ 7.88	$ 10.33	$ 10.72
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	0	398,905	213,662
Grant date fair value per share	$ 0	$ 7.33	$ 10.45
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(5,592)	(234)	(151,145)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 14.64	$ 0	$ 11.29
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(187,125)	(201,500)	(38,511)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 10.84	$ 11.63	$ 11.13
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	1 year	1 year 9 months 22 days	1 year 6 months 4 days
Awards Other Than Options Aggregate Intrinsic Value	$ 2,928	$ 3,657	$ 3,922
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	1,081,804	835,841	1,115,601	1,092,489
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 6.77	$ 8.90	$ 11.47	$ 12.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	737,200	459,295	465,789
Grant date fair value per share	$ 5.52	$ 6.33	$ 10.08
SharebasedcompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsTRSUgrantsinPeriodWeightedAverageGrantDateFairvalue	$ 11.75	$ 11.19	$ 11.84
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(360,349)	(672,930)	(299,538)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$ 5.52	$ 6.80	$ 10.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(130,888)	(66,125)	(143,139)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 7.66	$ 9.82	$ 11.63
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	1 year 11 months 5 days	1 year 10 months 28 days	1 year 7 months 24 days
Awards Other Than Options Aggregate Intrinsic Value	$ 7,781	$ 5,149	$ 11,033
Options and SARs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance (shares), beginning of period	2,229,046	1,898,409	2,773,788
Weighted average exercise price, beginning of period	$ 12.52	$ 15.27	$ 17.98
Granted (shares)	467,000	634,523	63,853
Granted, Weighted Average Exercise Price	$ 5.63	$ 6.91	$ 9.24
Exercised (shares)	(2,500)	(8,250)	(46,350)
Exercised, Weighted Average Exercise Price	$ 6.71	$ 7.26	$ 7.26
Expired or forfeited (shares)	(537,946)	(295,636)	(892,882)
Expired or forfeited, Weighted Average Exercise Price	$ 16.53	$ 18.30	$ 23.67
Balance (shares) , end of period	2,155,600	2,229,046	1,898,409
Weighted average exercise price, end of period	$ 10.03	$ 12.52	$ 15.27
Vested and expected to vest (shares)	2,124,474
Vested and expected to vest, Weighted Average Exercise Price	$ 10.09
Options exercisable (shares)	1,288,983,000
Options exercisable, Weighted Average Exercise Price	$ 12.54
Options outstanding, weighted average remaining contractual term	5 years 4 months 6 days	4 years 5 months 12 days	3 years 9 months 4 days
Options vested and expected to vest, weighted average remaining contractual term	5 years 3 months 18 days
Options exercisable, weighted average remaining contractual term	3 years 22 days
Options outstanding, aggregate intrinsic value	$ 904	$ 0	$ 1,275
Options vested and expected to vest, aggregate intrinsic value	867
Options exercisable, aggregate intrinsic value	$ 54

Share-Based Compensation - Addi

Share-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total amount of cash received from stock plan awards	$ 0.7	$ 0	$ 0.7
Total unrecognized share-based compensation, net of estimated forfeitures, expected recognition period	1 year 10 months 12 days
Shares reserved for issuance under existing plans	5,099,015
Shares available for grant	1,460,624
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized share-based compensation, net of estimated forfeitures	$ 6.9
2004 plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance under existing plans	3,638,391
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	4,400,000
Maximum contribution rate by employees	15.00%
Percentage of fair market value of common stock	85.00%
Length of offering period	24 months
Shares available for grant	622,276

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Hierarchy for Financial Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Available for sale Securities Current
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale Securities	$ 26,389	$ 25,039
Commercial Paper | Available for sale Securities Current
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale Securities	13,137	15,537
Government agencies | Available for sale Securities Current
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale Securities	13,252	2,702
Corporate Bonds | Available for sale Securities Current
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale Securities		853
Mutual, Exchange Traded, and Money Market funds [Member] | Available for sale Securities Current
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale Securities		2,075
Municipal Bonds | Available for sale Securities Current
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Available-for-sale Securities		3,872
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	2,504
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	2,504
Fair Value, Measurements, Recurring | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	15,252	4,725
Fair Value, Measurements, Recurring | Short-term Investments [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	1,003	0
Fair Value, Measurements, Recurring | Short-term Investments [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	14,249	4,725
Fair Value, Measurements, Recurring | Short-term Investments [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		2,075
Fair Value, Measurements, Recurring | Other Assets [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		2,075
Fair Value, Measurements, Recurring | Other Assets [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Other Assets [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	16,783	32,519
Fair Value, Measurements, Recurring | Cash Equivalents [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	4,643	14,280
Fair Value, Measurements, Recurring | Cash Equivalents [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	12,140	18,239
Fair Value, Measurements, Recurring | Cash Equivalents [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	588
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	588
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		190
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Other Assets [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		190
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Other Assets [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Other Assets [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	4,643	14,280
Fair Value, Measurements, Recurring | Money Market Funds [Member] | Cash Equivalents [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	4,643	14,280
Fair Value, Measurements, Recurring | Money Market Instruments | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	1,003
Fair Value, Measurements, Recurring | Money Market Instruments | Short-term Investments [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	1,003
Fair Value, Measurements, Recurring | Commercial Paper | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	997
Fair Value, Measurements, Recurring | Commercial Paper | Short-term Investments [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	997
Fair Value, Measurements, Recurring | Commercial Paper | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	12,140	15,537
Fair Value, Measurements, Recurring | Commercial Paper | Cash Equivalents [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	12,140	15,537
Fair Value, Measurements, Recurring | Government agencies | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	13,252
Fair Value, Measurements, Recurring | Government agencies | Short-term Investments [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	13,252
Fair Value, Measurements, Recurring | Government agencies | Cash Equivalents [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		2,702
Fair Value, Measurements, Recurring | Government agencies | Cash Equivalents [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		2,702
Fair Value, Measurements, Recurring | Corporate Bonds | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		853
Fair Value, Measurements, Recurring | Corporate Bonds | Short-term Investments [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		853
Fair Value, Measurements, Recurring | Municipal Bonds | Short-term Investments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		3,872
Fair Value, Measurements, Recurring | Municipal Bonds | Short-term Investments [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Municipal Bonds | Short-term Investments [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		3,872
Fair Value, Measurements, Recurring | Municipal Bonds | Short-term Investments [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		76
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(245)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Japanese Yen
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(31)	(7)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | New Taiwan Dollars
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	5	17
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Korean Won
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	129
Financial and Nonfinancial Liabilities, Fair Value Disclosure		(44)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Euro
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		277
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(367)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | British Pound
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure		(133)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Chinese Renminbi
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(1)	(34)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Singapore Dollar
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	20
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		76
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(245)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | Japanese Yen
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(31)	(7)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | New Taiwan Dollars
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	5	17
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | Korean Won
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	129
Financial and Nonfinancial Liabilities, Fair Value Disclosure		(44)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | Euro
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		277
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(367)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | British Pound
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure		(133)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | Chinese Renminbi
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(1)	(34)
Fair Value, Measurements, Recurring | Forward purchase or (sale) contracts | Level 2 | Singapore Dollar
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets	20
Fair Value, Measurements, Recurring | Exchange Traded Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	1,916
Fair Value, Measurements, Recurring | Exchange Traded Funds [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	$ 1,916
Fair Value, Measurements, Recurring | Exchange Traded Funds [Member] | Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		1,885
Fair Value, Measurements, Recurring | Exchange Traded Funds [Member] | Other Assets [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		1,885
Fair Value, Measurements, Recurring | Exchange Traded Funds [Member] | Other Assets [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		0
Fair Value, Measurements, Recurring | Exchange Traded Funds [Member] | Other Assets [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Fair value of financial assets		$ 0

Fair Value Measurements - Inves

Fair Value Measurements - Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Available for sale Securities Current
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 26,389	$ 25,039
Unrealized Gain	5	127
Unrealized Loss	0	0
Cost	26,384	24,912
Available for sale Securities Current | Commercial Paper
Schedule of Available-for-sale Securities
Available-for-sale Securities	13,137	15,537
Unrealized Gain	0	0
Unrealized Loss	0	0
Cost	13,137	15,537
Available for sale Securities Current | Government agencies
Schedule of Available-for-sale Securities
Available-for-sale Securities	13,252	2,702
Unrealized Gain	5	0
Unrealized Loss	0	0
Cost	13,247	2,702
Available for sale Securities Current | Corporate Bonds
Schedule of Available-for-sale Securities
Available-for-sale Securities		853
Unrealized Gain		0
Unrealized Loss		0
Cost		853
Available for sale Securities Current | Mutual, Exchange Traded, and Money Market funds [Member]
Schedule of Available-for-sale Securities
Available-for-sale Securities		2,075
Unrealized Gain		125
Unrealized Loss		0
Cost		1,950
Available for sale Securities Current | Municipal Bonds
Schedule of Available-for-sale Securities
Available-for-sale Securities		3,872
Unrealized Gain		2
Unrealized Loss		0
Cost		$ 3,870
Available for sale Securities Non Current
Schedule of Available-for-sale Securities
Available-for-sale Securities	2,504
Unrealized Gain	0
Unrealized Loss	(3)
Cost	2,507
Available for sale Securities Non Current | Exchange Traded Funds [Member]
Schedule of Available-for-sale Securities
Available-for-sale Securities	2,504
Unrealized Gain	0
Unrealized Loss	(3)
Cost	$ 2,507

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Millions	Apr. 02, 2016USD ($)
Schedule of Available-for-sale Securities
Investments maturity within one year	$ 26.4

Business Acquisitions - Allocat

Business Acquisitions - Allocation of Purchase Price of Assets Acquired and Liabilities Assumed Based on the Fair Value (Details) - USD ($)	Jan. 15, 2015	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	$ 268,000
Goodwill		$ 7,445,000	$ 7,717,000
Cash paid to acquire subsidiaries		0	7,737,000	$ 9,731,000
Gain on acquisition of Semiconductor Systems business		$ 0	$ 0	$ 499,000
Topwin [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	454,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	10,500,000
Payments to Acquire Businesses, Gross	7,600,000
Business Acquisition, Purchase Price Allocation, Current Assets, Inventory	544,000
Prepaid Expense and Other Assets, Current	295,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	23,000
Business Combination, Acquired Intangibles	3,618,000
Goodwill, Gross	7,445,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	$ 1,859,000

Business Acquisitions Business

Business Acquisitions Business Acquisition (Details) - Topwin [Member]	Jan. 15, 2015USD ($)shares
Compensation and Expenses for Business Acquisitions [Line Items]
Business Combination, Acquired Intangibles	$ 3,618,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	4,900,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	2,900,000
Shares Granted As Consideration, Value	2,000,000
Business Acquisition, Cash Compensation Paid or Payable	200,000
Business Acquisition, Transaction Costs	1,000,000
Amortization [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Transaction Costs	$ 100,000
Issuable [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	748,944
Shares Granted As Consideration | shares	513,328
Developed Technology Rights [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Combination, Acquired Intangibles	$ 3,500,000
share-based compensation expense [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Transaction Costs	900,000
Contingent Consideration [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 400,000
Contingent Consideration [Member] | Issuable [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	374,472
Contingent Consideration [Member] | Issued [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	0
Shares Granted As Consideration | shares	0
Non contingent Consideration [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 2,500,000
Non contingent Consideration [Member] | Issuable [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	374,472
Non contingent Consideration [Member] | Issued [Member]
Compensation and Expenses for Business Acquisitions [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	87,378
Shares Granted As Consideration | shares	59,887

Trade Receivables, net (Details

Trade Receivables, net (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Net, Current	$ 42,770	$ 42,295
Accounts Receivable, Net, Noncurrent	320	3,656
Accounts Receivable, Net	$ 43,090	$ 45,951

Inventories - Components of Inv

Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jan. 02, 2016	Apr. 02, 2016	Mar. 28, 2015
Inventory [Line Items]
Inventory Adjustments	$ 1,400	$ 1,400	$ 1,000
Inventories		$ 60,470	$ 56,637

Other Current Assets (Details)

Other Current Assets (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Disclosure Other Current Assets [Abstract]
Prepaid expenses	$ 2,747	$ 2,595
Value added tax receivable	1,353	802
Business Combination, Contingent Consideration, Asset, Current	0	1,180
Other	1,240	1,513
Other current assets	$ 5,340	$ 6,090

Property, Plant and Equipment70

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 132,453	$ 128,759
Less accumulated depreciation	(107,910)	(102,901)
Property, plant and equipment, net	24,543	25,858
Depreciation and amortization	6,800	7,200	$ 7,100
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,152	2,152
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 36,487	37,841
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 57,986	53,781
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	10 years
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 35,828	$ 34,985
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	1 year
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years

Goodwill (Details)

Goodwill (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Goodwill [Abstract]
Goodwill	$ 7,445	$ 7,717

Acquired Intangible Assets - Co

Acquired Intangible Assets - Components of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 28,292	$ 28,838
Less accumulated amortization	(21,146)	(19,880)
Total acquired intangible assets	7,146	8,958
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 19,457	20,001
Weighted average useful life	7 years 1 month 15 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 3,154	3,154
Weighted average useful life	5 years 6 months 25 days
Customer backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 1,341	1,341
Weighted average useful life	1 year
Trade name and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 463	463
Weighted average useful life	3 years
Fair value of below-market lease
Acquired Finite-Lived Intangible Assets [Line Items]
Below Market Lease, Gross	$ 310	310
Weighted average useful life	3 years 9 months 18 days
Change of control agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 100	100
Weighted average useful life	1 year
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	$ 3,467	$ 3,469
Weighted average useful life	13 years 16 days

Acquired Intangible Assets - 73

Acquired Intangible Assets - Components of Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangibles	$ 1,376	$ 1,502	$ 2,985
Cost of Sales
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangibles	1,140	1,095	2,293
Selling, service and administration
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangibles	36	210	212
Research, development and engineering
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangibles	$ 200	$ 197	$ 480

Acquired Intangible Assets - Fu

Acquired Intangible Assets - Future Amortization Expense (Details) $ in Thousands	Apr. 02, 2016USD ($)
Intangible Assets Disclosure [Abstract]
2,015	$ 1,089
2,016	1,087
2,017	1,087
2,018	1,035
2,019	1,012
Future years	1,836
Total	$ 7,146

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Disclosure Other Assets [Abstract]
Consignment and demo equipment, net	$ 7,164	$ 7,242	$ 7,164
Long term deposits	2,376	2,543	2,376
Other	15	2,521	15
Other assets	13,211	12,626	13,211
Schedule of Cost-method Investments [Line Items]
Demo equipment depreciation expense		500	600
Other than temporary impairment of cost based investments	4,300	0	4,263	$ 9,703
Accounts Receivable, Net, Noncurrent	$ 3,656	$ 320	$ 3,656
Class D Preferred Stock | Omni Guide, Inc.
Disclosure Other Assets [Abstract]
Minority equity investment
Schedule of Cost-method Investments [Line Items]
Minority equity investment
Class E Preferred Stock | Omni Guide, Inc.
Disclosure Other Assets [Abstract]
Minority equity investment
Schedule of Cost-method Investments [Line Items]
Minority equity investment

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Current
Inventory valuation and warranty costs	$ 0	$ 10,781
Receivables and other current assets	0	(272)
Payroll-related accruals	0	1,288
Accrued liabilities	0	2,382
Deferred revenue	0	3,368
Other	0	(1,029)
Total current deferred tax assets	0	18,576
Valuation allowance, current	0	(18,571)
Net current deferred tax assets	0	5
Non-current
Deferred tax asset, inventory and warranty, non-current	11,524	0
Deferred Tax Assets Receivables and other non-current assets	(91)	0
Deferred compensation	6,035	4,704
Intangible assets and investments	865
Non-current deferred tax liabilities, Intangible assets and investments		1,677
Accrued liabilities	1,626	454
Non-current deferred income taxes, net	1,746	0
Property, plant and equipment	5,220	5,187
Other comprehensive income	219
Deferred Tax Liabilities, Other Comprehensive Income		(112)
Tax loss and credit carryforwards	67,630	59,137
Deferred Tax Assets, Other	(219)	1,049
Total non-current deferred tax asset	94,555	68,742
Valuation allowance, non-current	(93,875)	(69,011)
Net non-current deferred tax assets	680
Deferred Tax Liabilities, Net of Allowance, Noncurrent		(269)
Total deferred tax assets	94,555	87,318
Total valuation allowance	(93,875)	(87,582)
Net deferred tax assets	680
Increase in valuation allowance	$ (6,300)
Deferred Tax Liabilities, Net		$ (264)

Income Taxes - Operating Losses

Income Taxes - Operating Losses and Tax Credits (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Income Tax Disclosure [Abstract]
Federal net operating losses	$ 27,430	$ 19,785
Federal net operating losses	3,467	3,467
Foreign operating losses and tax credits	12,173	11,433
Federal research credits	21,336	19,670
State research credits	4,480	4,287
Federal minimum tax credit	990	1,049
Federal capital losses	8,022	8,855
Net operating loss carryforward, net of tax and tax credits	$ 77,898	$ 68,546

Income Taxes - Components of In

Income Taxes - Components of Income Before Income Taxes and Provision for Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
(Loss) income before income taxes:
Domestic	$ (13,385)	$ (39,656)	$ (37,739)
Foreign	1,112	(3,921)	(687)
Income (loss) before income taxes	(12,273)	(43,577)	(38,426)
Current:
U.S. federal and state	8	(983)	(605)
Foreign	916	1,205	437
Current (benefit from) provision for income taxes	924	222	(168)
Deferred:
U.S. federal and state	0	5	(26)
Foreign	(940)	7	102
Deferred provision for (benefit from) income taxes	(940)	12	76
Total provision for (benefit from) income taxes	(16)	$ 234	$ (92)
Tax benefit derived from stock-based compensation	$ 0

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Effective Tax Rate (Details)	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	(0.50%)	(1.10%)	(0.60%)
Tax credits	17.10%	4.20%	3.00%
Domestic production and export tax incentives	0.00%	0.00%	0.00%
Non-U.S. income taxed at different rates	14.30%	2.10%	3.30%
Changes in unrecognized tax benefits	(4.10%)	(2.40%)	2.10%
Change in valuation allowance	(51.80%)	(32.30%)	(38.00%)
Stock compensation	(10.20%)	(4.20%)	(4.10%)
Other, net	0.30%	(2.00%)	(0.50%)
Effective tax rate	0.10%	(0.70%)	0.20%

Income Taxes - Unrecognized Tax

Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, unrecognized tax benefits	$ 200	$ 200
Beginning unrecognized tax benefits balance	9,654	9,356	$ 9,210
Gross increases for tax positions of prior years	731	849	44
Gross decreases for tax positions of prior years	0	(1,013)	0
Gorss increases for tax positions for current year	0	462	102
Ending unrecognized tax benefits balance	$ 10,385	$ 9,654	$ 9,356

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Disclosure Accrued Liabilities [Abstract]
Employee-related Liabilities, Current	$ 5,717	$ 6,723
Product warranty accrual	3,666	3,342
Purchase order commitments and receipts	2,588	1,815
Customer deposits	1,731	1,057
Professional fees payable	1,052	1,237
Restructuring Reserve, Current	757	1,997
Freight accrual	538	171
Value added taxes payable	388	474
Income taxes payable	181	83
Other	1,716	1,767
Accrued liabilities	18,334	18,666
Deferred Compensation Liability, Classified, Noncurrent	2,504	0
Product Warranty Accrual, Noncurrent	2,068	0
Other Sundry Liabilities, Noncurrent	3,229	1,571
Liabilities, Other than Long-term Debt, Noncurrent	$ 7,801	$ 1,571

Product Warranty (Details)

Product Warranty (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Product Warranties Disclosures [Abstract]
Standard and Extended Product Warranty Accrual Beginning	$ 3,342	$ 4,215	$ 5,411
Standard and Extended Product Warranty Accrual, Decrease for Payments	7,781	6,468	7,178
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued	10,173	5,595	5,982
Standard and Extended Product Warranty Accrual Ending	$ 5,734	$ 3,342	$ 4,215

Deferred Revenue (Details)

Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Deferred Revenue Disclosure [Abstract]
Deferred Revenue, Noncurrent	$ 1,312
Deferred revenue, beginning	12,376	$ 10,515	$ 10,196
Revenue deferred	58,416	46,139	34,594
Revenue recognized	(63,107)	(44,278)	(34,275)
Deferred revenue, ending	$ 7,685	$ 12,376	$ 10,515

Derivative Financial Instrume84

Derivative Financial Instruments (Details) - Forward exchange contract - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 13,076	$ 2,845
Japanese Yen
Derivative [Line Items]
Derivative Asset, Notional Amount	5,079	4,263
Euro
Derivative [Line Items]
Derivative Asset, Notional Amount	12,073	10,354
New Taiwan Dollars
Derivative [Line Items]
Notional amount of currencies purchased and sold	(117)	(831)
Korean Won
Derivative [Line Items]
Notional amount of currencies purchased and sold		(3,000)
Derivative Asset, Notional Amount	197
British Pound
Derivative [Line Items]
Notional amount of currencies purchased and sold	(2,350)	(2,906)
Chinese Renminbi
Derivative [Line Items]
Notional amount of currencies purchased and sold	(1,859)	(4,278)
Singapore Dollar
Derivative [Line Items]
Notional amount of currencies purchased and sold		(598)
Derivative Asset, Notional Amount	53
Canada, Dollars
Derivative [Line Items]
Notional amount of currencies purchased and sold	$ 0	$ (159)

Commitments and Contingencies85

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Commitments and Contingencies Disclosure [Abstract]
2,015	$ 3,032
2,016	2,344
2,017	1,589
2,018	215
2,019	132
Thereafter	0
Total lease commitments	7,312
Rental expense	$ 2,500	$ 2,700	$ 2,800

Loan Agreement (Details)

Loan Agreement (Details) - Loan and Security Agreement (Loan Agreement) [Member] - Silicon Valley Bank (SVB) [Member]	Mar. 20, 2015USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Debt default, Interest Rate	5.00%
Line of Credit Facility, Commitment Fee Amount	$ 75,000
Line of Credit Facility, Annual Commitment Fee Amount	12,500
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	30,000,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000,000
Minimum
Line of Credit Facility [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.30%
Maximum
Line of Credit Facility [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%
London Interbank Offered Rate (LIBOR) [Member] | Minimum
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.00%
London Interbank Offered Rate (LIBOR) [Member] | Maximum
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.75%
Prime Rate [Member] | Minimum
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Prime Rate [Member] | Maximum
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%

(Loss) Earnings Per Share - Rec

(Loss) Earnings Per Share - Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Earnings Per Share [Abstract]
Net income (loss)	$ 1,953	$ (4,586)	$ (3,260)	$ (6,364)	$ (22,941)	$ (6,376)	$ (6,243)	$ (8,251)	$ (12,257)	$ (43,811)	$ (38,334)
Weighted average number of shares - basic									31,411	30,611	29,974
Incremental diluted shares									0	0	0
Weighted average shares used for diluted earnings per share									31,411	30,611	29,974
Net (loss) income per share - basic	$ 0.06	$ (0.15)	$ (0.10)	$ (0.20)	$ (0.75)	$ (0.21)	$ (0.20)	$ (0.27)	$ (0.39)	$ (1.43)	$ (1.28)
Net (loss) income per share - diluted	$ 0.06	$ (0.15)	$ (0.10)	$ (0.20)	$ (0.75)	$ (0.21)	$ (0.20)	$ (0.27)	$ (0.39)	$ (1.43)	$ (1.28)

(Loss) Earnings Per Share - Add

(Loss) Earnings Per Share - Additional Information (Details) - shares shares in Millions	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share
Number of shares that are not included in the calculation of diluted net earnings per share	2.3	2.9	3.8

Shareholders' Equity - Share Re

Shareholders' Equity - Share Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Dec. 09, 2011
Stockholders' Equity Note [Abstract]
Stock Repurchased During Period, Shares	207,738	19,832
Share repurchases	$ 1.5	$ 0.2
Treasury Stock Acquired, Average Cost Per Share	$ 7.01	$ 9.65
Share repurchase authorization amount			$ 20

Shareholders' Equity - Dividend

Shareholders' Equity - Dividend Declared and Paid (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Stockholders' Equity Note [Abstract]
Cash dividends paid to shareholders	$ 0	$ 7,266	$ 9,557

Segment and Geographic Inform91

Segment and Geographic Information - Net Sales & Gross Profit by Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Segment Reporting Information [Line Items]
Gross Profit	$ 21,184	$ 17,721	$ 18,421	$ 15,377	$ 12,915	$ 14,713	$ 14,765	$ 12,288	$ 72,703	$ 54,681	$ 59,871
Revenue, Net	$ 51,486	$ 43,342	$ 46,472	$ 43,091	$ 37,571	$ 43,661	$ 42,856	$ 35,030	184,391	159,118	181,167
Component Processing [Member]
Segment Reporting Information [Line Items]
Gross Profit									66,693	50,970	63,914
Revenue, Net									152,284	124,598	141,401
Micromachining [Member]
Segment Reporting Information [Line Items]
Gross Profit									9,386	6,383	12,175
Revenue, Net									32,107	34,520	39,766
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Gross Profit									$ (3,376)	$ (2,672)	$ (16,218)

Segment and Geographic Inform92

Segment and Geographic Information - Net Sales by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 51,486	$ 43,342	$ 46,472	$ 43,091	$ 37,571	$ 43,661	$ 42,856	$ 35,030	$ 184,391	$ 159,118	$ 181,167
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									152,259	124,049	136,336
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									21,206	18,067	31,596
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									$ 10,926	$ 17,002	$ 13,235

Segment and Geographic Inform93

Segment and Geographic Information - Long-Lived Assets By Geographic Area (Details) - USD ($) $ in Thousands	Apr. 02, 2016	Mar. 28, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 49,256	$ 54,341
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	26,359	28,606
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	17,318	19,775
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 5,579	$ 5,960

Restructuring and Cost Manage94

Restructuring and Cost Management Plans - Restructuring Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 28, 2015	Mar. 30, 2013	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Restructuring and Related Activities [Abstract]
Restructuring and Related Cost, Expected Cost			$ 5,500
Restructuring costs	$ 2,000		2,824	$ 2,069	$ 1,070
Restructuring Charges, COGS and Opex				3,000
Restructuring Reserve, Current	1,997		757	1,997
Restructuring Reserve [Roll Forward]
Beginning balance			1,997	1,050	485
Costs incurred and other adjustments		$ (204)	(4,064)	(985)
Cash payments		(769)	(2,824)	(1,932)
Ending balance	$ 1,997	$ 485	$ 757	$ 1,997	$ 1,050

Quarterly Financial Informati95

Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 02, 2016	Jan. 02, 2016	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Apr. 02, 2016	Mar. 28, 2015	Mar. 29, 2014
Quarterly Financial Information Disclosure [Abstract]
Sales Revenue, Goods, Net	$ 44,043	$ 31,282	$ 35,570	$ 32,062	$ 26,156	$ 31,750	$ 30,273	$ 23,424	$ 142,957	$ 111,603	$ 142,054
Sales Revenue, Services, Net	7,443	12,060	10,902	11,029	11,415	11,911	12,583	11,606	41,434	47,515	39,113
Net sales	51,486	43,342	46,472	43,091	37,571	43,661	42,856	35,030	184,391	159,118	181,167
Cost of Goods Sold	25,247	20,292	22,345	21,285	18,488	22,031	20,742	16,934	89,169	78,195	100,870
Cost of Services	5,055	5,329	5,706	6,429	6,168	6,917	7,349	5,808	22,519	26,242	20,426
Cost of Goods and Services Sold	30,302	25,621	28,051	27,714	24,656	28,948	28,091	22,742	111,688	104,437	121,296
Gross profit	21,184	17,721	18,421	15,377	12,915	14,713	14,765	12,288	72,703	54,681	59,871
Net income (loss)	$ 1,953	$ (4,586)	$ (3,260)	$ (6,364)	$ (22,941)	$ (6,376)	$ (6,243)	$ (8,251)	$ (12,257)	$ (43,811)	$ (38,334)
Basic net (loss) income per share	$ 0.06	$ (0.15)	$ (0.10)	$ (0.20)	$ (0.75)	$ (0.21)	$ (0.20)	$ (0.27)	$ (0.39)	$ (1.43)	$ (1.28)
Diluted net (loss) income per share	0.06	(0.15)	(0.10)	(0.20)	(0.75)	(0.21)	(0.20)	(0.27)	(0.39)	(1.43)	(1.28)
Dividends declared per outstanding common share	0	0	0	0	0	0.08	0.08	0.08
Cash dividends paid per common share	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.08	$ 0.08	$ 0.08	$ 0	$ 0.24	$ 0.32
Other Quarterly Information [Abstract]
Impairment of Intangible Assets	$ 400
Restructuring Costs	$ (200)	$ (1,900)	$ (600)		$ (1,000)
Goodwill, Impairment Loss					7,900				$ 0	$ 7,889	$ 0
Business Combination, Integration Related Costs			$ 100	$ 200	500	$ 300			194	776	0
Other than temporary impairment of cost based investments					4,300				0	4,263	9,703
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property					600				(862)	6	1,138
Inventory Adjustments		$ 1,400							1,400	1,000
Restructuring costs					$ 2,000				2,824	2,069	1,070
Loss on disposal of assets									$ 0	$ 0	$ 1,301