CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (9,624)	$ (14,494)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation, Depletion and Amortization	3,803	3,909
Amortization of acquired intangible assets	725	857
Share-based compensation expense	2,626	2,363
Loss on sale of property and equipment, net	(6)	56
Provision for Doubtful Accounts	127	0
Decrease (increase) in deferred income taxes	106	(170)
Changes in operating accounts, net of acquisitions:
Decrease (increase) in trade receivables, net	(3,953)	(2,085)
Decrease (increase) in inventories	(2,668)	2,851
Decrease (increase) in shipped systems pending acceptance	17	(3,126)
Decrease in other current assets	2,736	679
Increase (decrease) in accounts payable and accrued liabilities	10,308	245
(Decrease) increase in deferred revenue	286	5,925
Net cash provided by operating activities	4,495	(3,102)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of investments	(261,978)	(279,918)
Proceeds from sales and maturities of investments	251,982	303,793
Purchase of property, plant and equipment	(2,185)	(2,365)
Proceeds from Sale of Property, Plant, and Equipment	0	154
Decrease (increase) in other assets	386	(857)
Net cash provided by (used in) investing activities	(11,795)	20,807
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividends paid to shareholders	0	(4,834)
Payments Related to Tax Withholding for Share-based Compensation	(603)	(1,203)
Stock plan activity, net	737	941
Payments for Repurchase of Common Stock	0	(1,456)
Net cash (used in) provided by financing activities	134	(6,552)
Effect of exchange rate changes on cash	(186)	(359)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(7,352)	10,794
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	50,994	68,461
CASH AND CASH EQUIVALENTS AT END OF PERIOD	43,642	79,255
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest	(57)	(2)
Cash paid for income taxes	(478)	(489)
Income tax refunds received	$ 110	$ 557