CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 28, 2014	Jun. 29, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (8,251)	$ (3,283)
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation and amortization	1,957	1,747
Amortization of acquired intangible assets	539	722
Share-based compensation expense	1,330	2,634
Gain on sale of property and equipment, net	(19)	37
Gain on acquisition of Semiconductor Systems business	0	(464)
Other than temporary impairment of cost based investments	0	0
Decrease (increase) in deferred income taxes	(103)	(289)
Changes in operating accounts, net of acquisitions:
Decrease (increase) in trade receivables, net	4,958	(2,573)
Decrease (increase) in inventories	(1,609)	(2,676)
Decrease (increase) in shipped systems pending acceptance	(493)	(850)
Decrease (increase) in other current assets	234	(1,441)
Increase (decrease) in accounts payable and accrued liabilities	441	(2,655)
Increase (decrease) in deferred revenue	1,753	391
Net cash (used in) provided by operating activities	737	(8,700)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of investments	(133,765)	(123,126)
Proceeds from sales and maturities of investments	152,328	129,015
Purchase of property, plant and equipment	(1,158)	(1,215)
Proceeds from sale of property, plant, and equipment	105	0
Cash paid for business acquisitions	0	(8,000)
Decrease (increase) in other assets	(276)	239
Net cash (used in) provided by investing activities	17,234	(3,087)
CASH FLOWS FROM FINANCING ACTIVITIES
Cash dividends paid to shareholders	(2,417)	(2,379)
Stock plan activity, net	(615)	(796)
Payments for Repurchase of Common Stock	(1,330)
Net cash (used in) provided by financing activities	(4,362)	(3,175)
Effect of exchange rate changes on cash	389	(186)
NET CHANGE IN CASH AND CASH EQUIVALENTS	13,998	(15,148)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	68,461	88,913
CASH AND CASH EQUIVALENTS AT END OF PERIOD	82,459	73,765
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest	2	0
Cash paid for income taxes	(320)	(338)
Income tax refunds received	$ 2	$ 2