CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Jul. 01, 2017	Jul. 02, 2016
Repayments of Long-term Debt	$ (105)	$ 0
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	2,902	(118)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	1,847	1,710
Amortization of acquired intangible assets	298	279
Share-based compensation expense	1,463	1,462
Provision for Doubtful Accounts	297	(115)
Inventory Write-down	0	1,216
Restructuring Charges	6,354	0
Decrease (increase) in deferred income taxes	(73)	15
Changes in operating accounts, net of acquisitions:
Decrease (increase) in trade receivables, net	(8,582)	8,463
Decrease (increase) in inventories	(3,564)	(2,313)
Decrease (increase) in shipped systems pending acceptance	(944)	(1,138)
Decrease (increase) in other current assets	863	141
Increase (decrease) in accounts payable and accrued liabilities	6,448	(593)
Increase (decrease) in deferred revenue	122	2,439
Net cash (used in) provided by operating activities	7,431	11,448
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of investments	(9,239)	(96,691)
Proceeds from sales and maturities of investments	4,949	107,148
Purchase of property, plant and equipment	(448)	(1,469)
Decrease (increase) in other assets	(84)	(9)
Net cash (used in) provided by investing activities	(4,789)	8,979
Proceeds from Sale of Property, Plant, and Equipment	33	0
CASH FLOWS FROM FINANCING ACTIVITIES
Payments Related to Tax Withholding for Share-based Compensation	(739)	(730)
Proceeds from Issuance of Common Stock	338	332
Net cash (used in) provided by financing activities	(506)	(398)
Effect of exchange rate changes on cash	135	21
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	2,271	20,050
Cash and Cash Equivalents, at Carrying Value	58,909
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	60,003	62,463
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest	166	25
Cash paid for income taxes	(349)	(132)
Income tax refunds received	38	0
Property, Plant and Equipment, Gross, Period Increase (Decrease)	(1,301)	1,987
Property, Plant and Equipment, Additions	$ 61	$ 1,050