Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Dec. 29, 2013	Nov. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average estimated fair value, options (in dollars per share)	$ 2.92	$ 1.27
Fair value of unvested stock options	$ 2,400,000	$ 1,900,000
Closing stock price (in dollars per share)	$ 5.18			$ 2.90
The total intrinsic value of options exercised	2,800,000	14,000
Total cash received from employees as a result of employee stock option exercises	3,000,000	25,000
Stock-based compensation	732,000	452,000
Unrecognized stock-based compensation expense	59,000
Weighted average estimated fair value (in dollars per share)	$ 3.35		$ 3.17
Compensation expense related to ESPP	60,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period of unrecognized stock-based compensation expense	2 years 7 months 2 days
Stock-based compensation	311,000
Restricted Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	320,000
Performance Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	41,000
Unrecognized stock-based compensation expense	$ 506,000
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 month 15 days
Weighted average estimated fair value (in dollars per share)	$ 0.85		$ 0.55
Shares available for issuance (in shares)	1,200,000