Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Share-Based Compensation - Share-Based Compensation Plan Information (Details)

v3.3.1.900
Stockholders' Equity and Share-Based Compensation - Share-Based Compensation Plan Information (Details) - USD ($)
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average fair value of options granted $ 1.19 $ 1.34 $ 1.22
Shares exercisable 3,734,591    
Intrinsic value of the exercised options $ 346,000 $ 153,000 $ 61,000
Unrecognized share-based compensation expense $ 1,371,000    
Weighted-average period of unrecognized compensation expense 2 years 6 months 18 days    
Shares related to the net settlement of the stock options 112,000    
2006 Equity Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants 0    
2007 Omnibus Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock authorized 2,400,000    
Maximum number of shares authorized to issued under condition one 1,500,000    
Maximum percentage of shares authorized to issued under condition one 5.00%    
Expiration period 10 years    
Option grant vesting period 4 years    
Exercise price of option grants 100.00%    
Shares available for future grants 2,095,000    
2007 New Employee Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Common stock authorized 2,000,000    
Expiration period 10 years    
Option grant vesting period 4 years    
Exercise price of option grants 100.00%    
Shares available for future grants 1,567,000    
Equity Incentive Plan 2014      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted-average fair value of options granted $ 0.55 $ 0.56 $ 0.00
Shares exercisable 49,000 0 0
Intrinsic value of the exercised options $ 0 $ 0 $ 0
Unrecognized share-based compensation expense $ 463,000    
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares withheld to satisfy employees' tax obligation 27,000    
Employees' tax obligation $ 80,000    
Employee Stock Option | Equity Incentive Plan 2014      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grants 1,000    
Weighted-average period of unrecognized compensation expense 3 years 2 months 10 days