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Stock-Based Compensation - Additional Information (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 03, 2017
$ / shares
Jan. 31, 2017
USD ($)
$ / shares
shares
Jan. 31, 2016
USD ($)
$ / shares
shares
Jan. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award        
Exercise price range, lower range limit (in USD per share) | $ / shares $ 1.30      
Weighted average period of recognition for compensation cost   6 months    
Cash received from the exercise of options | $   $ 0 $ 161  
Cash received from purchases pursuant to the Employee Stock Purchase Plan | $   $ 26 $ 115  
Change in control percentage   0.2    
$1.53 to $8.17        
Share-based Compensation Arrangement by Share-based Payment Award        
Exercise price range, lower range limit (in USD per share) | $ / shares   $ 1.19    
Exercise price range, upper range limit (in USD per share) | $ / shares   $ 8.1    
$1.53 to $2.00        
Share-based Compensation Arrangement by Share-based Payment Award        
Options outstanding   415,666    
Exercise price range, lower range limit (in USD per share) | $ / shares   $ 1.19    
Exercise price range, upper range limit (in USD per share) | $ / shares   $ 2.00    
Options exercisable (in shares)   66,747    
$2.08 to $4.00        
Share-based Compensation Arrangement by Share-based Payment Award        
Options outstanding   578,463    
Exercise price range, lower range limit (in USD per share) | $ / shares   $ 2.08    
Exercise price range, upper range limit (in USD per share) | $ / shares   $ 4.00    
Options exercisable (in shares)   335,592    
$4.02 to $8.17        
Share-based Compensation Arrangement by Share-based Payment Award        
Options outstanding   1,106,351    
Exercise price range, lower range limit (in USD per share) | $ / shares   $ 4.02    
Exercise price range, upper range limit (in USD per share) | $ / shares   $ 8.1    
Options exercisable (in shares)   972,303    
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award        
Options outstanding   2,100,480 2,411,879  
Options issued (in shares)   416,525    
Options expired (in shares)   342,502    
Options forfeited (in shares)   385,422    
Options exercised (in shares)   0    
Options exercisable (in shares)   1,374,642    
Weighted average grant date fair value (in USD per share) | $ / shares   $ 0.79 $ 1.64  
Total intrinsic value | $   $ 0 $ 125  
Compensation cost not yet recognized | $   564    
Allocated share-based compensation expense | $   $ 1,321 1,783  
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Weighted average period of recognition for compensation cost   2 years 1 month 6 days    
Allocated share-based compensation expense | $   $ 466 $ 582  
Compensation cost not yet recognized | $   $ 872    
2013 Incentive Compensation Plan | Blended Equity Awards (Stock Options, Stock Appreciation Rights, Resticted Stock)        
Share-based Compensation Arrangement by Share-based Payment Award        
Shares authorized to issue (not to exceed)   2,000,000    
Term of options granted (or less)       10 years
Vesting period       3 years
Options outstanding   1,800,480 2,186,879  
2013 Incentive Compensation Plan | SAR's        
Share-based Compensation Arrangement by Share-based Payment Award        
SAR's outstanding (in shares)     0  
2013 Incentive Compensation Plan | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award        
Vesting period   1 year    
Executive Inducement Grants | Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award        
Options outstanding   300,000 225,000  
Options issued (in shares)   75,000 0  
Options expired (in shares)   0 405,417  
Options forfeited (in shares)   0 69,583  
Options exercised (in shares)   0 0