Stock Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 29, 2012
Activity in stock option plan
Outstanding, Number of Shares, Beginning Balance	1,766,401
Outstanding, Weighted Average Exercise Price Per Share	$ 3.63
Granted, Number of Shares	137,150
Granted, Weighted Average Exercise Price Per Share	$ 4.00
Exercised, Number of Shares	(154,657)
Exercised, Weighted Average Exercise Price Per Share	$ 2.62
Canceled or forfeited, Number of Shares	(322,737)
Canceled or forfeited, Weighted Average Exercise Price Per Share	$ 4.32
Outstanding, Number of Shares, Ending Balance	1,426,157
Outstanding, Weighted Average Exercise Price Per Share	$ 3.61
Options outstanding, Aggregate Intrinsic Value	$ 1,000