Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Dec. 29, 2013	Dec. 30, 2012
Cash flows from operating activities:
Net income	$ 5,654,000	$ 1,210,000
Depreciation and amortization	9,386,000	8,333,000
Gain on sale of intangible asset		(223,000)
Stock-based compensation expense	7,267,000	3,010,000
Release of deferred tax asset valuation allowance	(6,770,000)
Net change in fair value of contingent consideration	(2,437,000)
Accounts receivable and accounts receivable, related party	(7,155,000)	(3,669,000)
Inventories	(3,764,000)	(346,000)
Other current and non-current assets	(558,000)	47,000
Accounts payable	4,849,000	2,256,000
Accrued compensation and related benefits	659,000	182,000
Deferred income and allowance on sales to distributors and related party distributor	(1,996,000)	(1,848,000)
Other current and non-current liabilities	(5,992,000)	(5,298,000)
Net cash provided by (used in) operating activities	(857,000)	3,654,000
Cash flows from investing activities:
Purchases of property, plant and equipment and intellectual property, net	(1,675,000)	(1,253,000)
Purchases of short-term marketable securities	(166,738,000)	(132,955,000)
Proceeds from maturities of short-term marketable securities	24,410,000	37,563,000
Proceeds from sales of short-term marketable securities	178,167,000	97,190,000
Acquisition, net of cash acquired	(23,111,000)
Other disposal activities	125,000	235,000
Net cash provided by investing activities	11,178,000	780,000
Cash flows from financing activities:
Proceeds from issuance of common stock	3,971,000	4,699,000
Purchase of stock for withholding taxes on vested restricted stock	(1,042,000)
Repurchase of common stock	(4,000,000)
Payments of lease financing obligations	(2,898,000)	(2,513,000)
Net cash provided by (used in) financing activities	(3,969,000)	2,186,000
Net increase in cash and cash equivalents	6,352,000	6,620,000
Cash and cash equivalents at the beginning of period	14,718,000	8,714,000
Cash and cash equivalents at the end of period	21,070,000	15,334,000
Cadeka [Member]
Cash flows from financing activities:
Issuance of common stock in connection with Cadeka acquisition	$ 5,177,000