Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Share-Based Compensation - Stock Option Exchange Program (Details)

v3.7.0.1
Stockholders' Equity and Share-Based Compensation - Stock Option Exchange Program (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Sep. 10, 2013
USD ($)
employee
$ / shares
shares
Aug. 12, 2013
$ / shares
shares
Dec. 31, 2016
$ / shares
Jan. 02, 2016
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercised (in dollars per share)     $ 2.06 $ 1.45
Stock Option Exchange Program        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercised (in dollars per share)   $ 4.00    
Share exchange ratio per share   3.5    
Shares issued under exchange program | shares   3,733    
Stock options vesting period 4 years 4 years    
Contractual term   10 years    
Exercisable options | shares 3,475      
Stock options exercised, weighted average exercise price (in dollars per share) $ 6.65      
Eligible employees | employee 45      
Unvested exercisable options | shares 993      
Unvested exercisable options exercise price (in dollars per share) $ 0.9866      
Incremental fair value on the date of exchange | $ $ 422      
Stock Option Exchange Program | Stock Options Vesting in Year One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vested, percentage   25.00%    
Stock Option Exchange Program | Stock Options Vesting After Year One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting period   36 months    
Stock options vested, percentage   75.00%    
Minimum | Stock Option Exchange Program        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option exercise price, minimum   $ 4.01    
Maximum | Stock Option Exchange Program        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option exercise price, maximum   $ 11.68