Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Dec. 29, 2013	Nov. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period			4 years
Weighted average estimated fair value, options (in dollars per share)	$ 2.10	$ 1.39	$ 2.10	$ 1.30
Fair value of unvested stock options	$ 1,900,000	$ 1,400,000	$ 1,900,000	$ 1,400,000
Closing stock price (in dollars per share)	$ 3.03		$ 3.03			$ 2.90
The total intrinsic value of options exercised			3,700,000	46,000
Total cash received from employees as a result of employee stock option exercises			4,300,000	108,000
Stock-based compensation	452,000	330,000	1,750,000	1,067,000
Unrecognized stock-based compensation expense	37,000		37,000
Weighted average estimated fair value (in dollars per share)	$ 3.36		$ 3.36		$ 3.17
Compensation expense related to ESPP	71,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
Weighted average recognition period of unrecognized stock-based compensation expense			2 years 4 months 2 days
Stock-based compensation	225,000		832,000
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	154,000
Performance Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	2,000
Unrecognized stock-based compensation expense	$ 515,000		$ 515,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period of unrecognized stock-based compensation expense			1 year 7 months 6 days
Weighted average estimated fair value (in dollars per share)	$ 1.01	$ 0.59	$ 1.01	$ 0.59
Shares available for issuance (in shares)	1,002,000		1,002,000