CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Cumulative Translation Adjustments [Member]	Accumulated Other Comprehensive Income (Loss) [Member] Unrealized Gain (Loss) on Securities [Member]	Accumulated Deficit [Member]	Total
Balances at Mar. 27, 2009	$ 291	$ 245,654	$ (9,177)	$ (2,030)	$ 768	$ (162,686)	$ 72,820
Balance (in shares) at Mar. 27, 2009	29,193
Issuance and sale of common stock under stock-based compensation plans	12	649	0	0	0	0	661
Issuance and sale of common stock under stock-based compensation plans (in shares)	1,151
Stock-based compensation	0	5,898	0	0	0	0	5,898
Net unrealized loss on available-for-sale securities	0	0	0	0	(386)	0	(386)
Repurchase of common stock	(3)	0	(1,197)	0	0	0	(1,200)
Repurchase of common stock (in shares)	(268)
Stock returned in connection with escrow settlements	0	(96)	0	0	0	0	(96)
Stock returned in connection with escrow settlements (in shares)	(16)
Cumulative translation adjustment	0	0	0	250	0	0	250
Net loss	0	0	0	0	0	(17,843)	(17,843)
Balances at Mar. 26, 2010	300	252,105	(10,374)	(1,780)	382	(180,529)	60,104
Balance (in shares) at Mar. 26, 2010	30,060
Issuance and sale of common stock under stock-based compensation plans	7	693	0	0	0	0	700
Issuance and sale of common stock under stock-based compensation plans (in shares)	701
Stock-based compensation	0	5,950	0	0	0	0	5,950
Net unrealized loss on available-for-sale securities	0	0	0	0	(258)	0	(258)
Repurchase of common stock	(3)	0	(1,158)	0	0	0	(1,161)
Repurchase of common stock (in shares)	(296)
Stock returned in connection with escrow settlements	(1)	(409)	0	0	0	0	(410)
Stock returned in connection with escrow settlements (in shares)	(76)
Cumulative translation adjustment	0	0	0	(452)	0	0	(452)
Net loss	0	0	0		0	(26,298)	(26,298)
Balances at Mar. 25, 2011	303	258,339	(11,532)	(2,232)	124	(206,827)	38,175
Balance (in shares) at Mar. 25, 2011	30,389
Issuance and sale of common stock under stock-based compensation plans	3	1	0	0	0	0	4
Issuance and sale of common stock under stock-based compensation plans (in shares)	289
Stock-based compensation	0	3,222	0	0	0	0	3,222
Net unrealized loss on available-for-sale securities	0	0	0	0	(87)	0	(87)
Repurchase of common stock	(1)	1	(279)	0	0	0	(279)
Repurchase of common stock (in shares)	(128)
Cumulative translation adjustment	0	0	0	50	0	0	50
Net loss	0	0	0	0		(34,143)	(34,143)
Balances at Mar. 30, 2012	$ 305	$ 261,563	$ (11,811)	$ (2,182)	$ 37	$ (240,970)	$ 6,942
Balance (in shares) at Mar. 30, 2012	30,550