Stock-Based Compensation (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Jan. 01, 2012	Nov. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity award vesting period	4 years
Options expiration period	10 years
Stock-based compensation	$ 1,979,000	$ 2,003,000	$ 1,676,000
Weighted average estimated fair value, options (in dollars per share)	$ 1.82	$ 1.36	$ 1.53
Fair value of unvested stock options	2,700,000
Closing stock price (in dollars per share)	$ 3.86			$ 2.90
The total intrinsic value of options exercised	139,000	343,000	1,800,000
Total cash received from employees as a result of employee stock option exercises	365,000	711,000	1,600,000
Unrecognized stock-based compensation expense	89,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	1,100,000	1,400,000	1,500,000
Weighted average term	2 years 7 months 10 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	590,000
Weighted average estimated fair value (in dollars per share)	$ 3.17	$ 2.30
Sales under ESPP (in shares)	245,000
Average price of sales under ESPP (in dollars per share)	$ 3.33
Preferred Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	64,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average term	4 months 15 days
Weighted average estimated fair value (in dollars per share)	$ 0.71	$ 0.74	$ 0.84
Sales under ESPP (in shares)	357,000	270,000	171,000
Average price of sales under ESPP (in dollars per share)	$ 1.74	$ 1.95	$ 2.47
Shares available for issuance (in shares)	1,200,000
Compensation expense related to ESPP	$ 203,000,000
2009 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance (in shares)	2,253,000	2,920,000
2009 Stock Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sales under ESPP (in shares)	215,000
2009 Stock Plan [Member] | Preferred Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sales under ESPP (in shares)	30,000