Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Apr. 01, 2012
Cash flows from operating activities:
Net income (loss)	$ 5,801,000	$ 2,882,000	$ (28,056,000)
Reconciliation of net income (loss) to net cash provided by (used in) operating activities:
Impairment charges	2,224,000
Depreciation and amortization	12,947,000	10,809,000	14,898,000
Gain on sale of intangible asset		(223,000)
Stock-based compensation expense	8,852,000	4,788,000	3,750,000
Release of deferred tax valuation allowance	(6,940,000)
Net change in fair value of contingent consideration	(10,455,000)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and accounts receivable, related party	(1,960,000)	(4,616,000)	1,598,000
Inventories	(5,907,000)	(930,000)	3,588,000
Other current and non-current assets	(305,000)	528,000	683,000
Accounts payable	5,505,000	1,632,000	(971,000)
Accrued compensation and related benefits	412,000	(513,000)	(2,364,000)
Other current liabilities	(8,563,000)	(5,847,000)	6,836,000
Deferred income and allowance on sales to distributors and related party distributor	(760,000)	(1,144,000)	(2,294,000)
Net cash provided by (used in) operating activities	851,000	7,366,000	(2,332,000)
Cash flows from investing activities:
Purchases of property, plant and equipment and intellectual property, net	(2,658,000)	(1,385,000)	(2,539,000)
Purchases of short-term marketable securities	(257,946,000)	(200,654,000)	(169,688,000)
Proceeds from maturities of short-term marketable securities	31,821,000	48,687,000	63,226,000
Proceeds from sales of short-term marketable securities	264,221,000	148,914,000	105,040,000
Acquisitions, net of cash	(22,777,000)	(750,000)
Other disposal activities	125,000	360,000	384,000
Net cash provided by (used in) investing activities	12,786,000	(4,828,000)	(3,577,000)
Cash flows from financing activities:
Proceeds from issuance of common stock	5,844,000	6,515,000	3,145,000
Shares withheld on RSUs released	(1,149,000)	(219,000)
Repayment of debt assumed from Stretch acquisition	(6,187,000)
Repurchase of common stock	(9,000,000)
Repayment of lease financing obligations	(3,249,000)	(2,830,000)	(3,561,000)
Net cash provided by (used) in financing activities	(13,741,000)	3,466,000	(416,000)
Net increase (decrease) in cash and cash equivalents	(104,000)	6,004,000	(6,325,000)
Cash and cash equivalents at the beginning of year	14,718,000	8,714,000	15,039,000
Cash and cash equivalents at the end of year	14,614,000	14,718,000	8,714,000
Supplemental disclosure of cash flow and non-cash information:
Return of Hillview Facility to Lessor			12,167,000
Issuance of common stock in connection with acquisitions	5,005,000	3,740,000	24,000
Cash paid for income taxes	106,000	154,000	122,000
Cash received from income taxes refund	4,000		19,000
Cash paid for interest	155,000	165,000	193,000
Property, plant and equipment acquired under capital lease			8,478,000
Hifn and Others [Member]
Supplemental disclosure of cash flow and non-cash information:
Issuance of common stock in connection with acquisitions	10,000	19,000	24,000
Altior [Member]
Supplemental disclosure of cash flow and non-cash information:
Issuance of common stock in connection with acquisitions		3,740,000
Cadeka [Member]
Supplemental disclosure of cash flow and non-cash information:
Issuance of common stock in connection with acquisitions	$ 5,005,000