Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 01, 2012	Mar. 27, 2011	Mar. 28, 2010
Cash flows from operating activities:
Net loss	$ (28,797)	$ (35,668)	$ (28,110)
Reconciliation of net loss to net cash provided by (used in) operating activities:
Intangible assets impairment and goodwill		7,485
Depreciation and amortization	14,898	19,414	20,825
Stock-based compensation expense	4,491	7,381	5,965
Other than temporary loss on investments		62	317
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable and accounts receivable, related party	1,598	4,814	(5,121)
Inventories	3,588	(6,962)	6,256
Other current and non-current assets	683	2,756	(204)
Accounts payable	(971)	(1,202)	2,473
Accrued compensation and related benefits	(2,364)	(1,495)	(925)
Other current liabilities	6,836	18	(2,030)
Deferred income and allowance on sales to distributors and related party distributor	(2,294)	435	4,195
Net cash (used in) provided by operating activities	(2,332)	(2,962)	3,641
Cash flows from investing activities:
Purchases of property, plant and equipment and intellectual property, net	(2,539)	(3,656)	(5,830)
Purchases of short-term marketable securities	(169,688)	(157,609)	(166,229)
Proceeds from maturities of short-term marketable securities	63,226	74,459	114,414
Proceeds from sales of short-term marketable securities	105,040	82,294	46,426
Other disposal (investment) activities	384	(219)	(42)
Acquisitions, net of cash acquired			(53,333)
Net cash used in investing activities	(3,577)	(4,731)	(64,594)
Cash flows from financing activities:
Proceeds from issuance of common stock	3,145	1,208	541
Payment of lease financing obligations	(3,561)	(3,962)	(3,104)
Net cash used in financing activities	(416)	(2,754)	(2,563)
Net decrease in cash and cash equivalents	(6,325)	(10,447)	(63,516)
Cash and cash equivalents at the beginning of period	15,039	25,486	89,002
Cash and cash equivalents at the end of period	8,714	15,039	25,486
Supplemental disclosure of non-cash investing and financial activities:
Return of Hillview Facility to Lessor	12,167
Issuance of common stock in connection with Hifn acquisition	24	27	2,709
Cash paid for income taxes	122	179	185
Cash received from income taxes refund	19	3,078
Cash paid for interest	193	1,289	1,327
Property, plant and equipment acquired under capital lease	$ 8,478	$ 1,808	$ 2,012