Summarized Information Regarding Options Outstanding and Options Exercisable (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 28, 2012	Sep. 28, 2012	Jun. 29, 2012	Sep. 30, 2011	Jul. 01, 2011	Mar. 31, 2012	Dec. 30, 2011	Mar. 31, 2011
Number of Options Outstanding
Beginning Balance	2,438	2,382	2,267	2,476	2,161		2,609
Granted		67	125	160	368
Exercised			(5)	(27)	(16)
Expired or forfeited	(31)	(11)	(5)		(37)
Ending Balance	2,407	2,438	2,382	2,609	2,476		2,609
Vested & expected to Vest	2,353						2,531
Weighted Average Exercise Price per Share
Beginning Balance	$ 1.66	$ 1.69	$ 1.75	$ 1.64	$ 1.65		$ 1.60
Granted		$ 0.62	$ 0.63	$ 0.95	$ 1.52
Exercised			$ 0.44	$ 0.83	$ 0.57
Expired or forfeited	$ 1.19	$ 2.26	$ 0.44		$ 1.69
Ending Balance	$ 1.67	$ 1.66	$ 1.69	$ 1.60	$ 1.64		$ 1.60
Vested & expected to Vest	$ 1.69						$ 1.60
Number of Shares Exercisable
Number of Shares Exercisable	2,085	2,058	2,023	1,972	1,980	1,994	2,347	1,933
Weighted Average Exercise Price per Share
Weighted Average Exercise Price per Share	$ 1.81	$ 1.83	$ 1.86	$ 1.74	$ 1.72	$ 1.88	$ 1.70	$ 1.74