Stock-Based Compensation (Narrative) (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011	Jan. 01, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average estimated fair value, options	$ 1.94	$ 1.82	$ 1.82	$ 2.12
Fair value of unvested stock options	$ 2,200,000		$ 2,200,000
Closing stock price	$ 2.51		$ 2.51
The total intrinsic value of options exercised			152,000	1,600,000
Total cash received from employees as a result of employee stock option exercises			273,000	1,400,000
Stock-based compensation	434,000	436,000	818,000	879,000
Weighted average estimated fair value	$ 2.52		$ 2.52		$ 0
Shares available for issuance	3,157		3,157		2,969
Compensation expense related to ESPP	73,000
Unrecognized stock-based compensation expense	84,000		84,000
Equity award vesting period			0 years 4 months 24 days
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	434,000		818,000
Weighted average recognition period of unrecognized stock-based compensation expense			2 years 2 months 27 days
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation			3,000
Unrecognized stock-based compensation expense	$ 1,000		$ 1,000
Weighted average recognition period of unrecognized stock-based compensation expense			29 days
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average estimated fair value	$ 1.15	$ 0.80	$ 1.15	$ 0.80
Shares available for issuance	2,300		2,300
Weighted average recognition period of unrecognized stock-based compensation expense			4 months 10 days