v3.5.0.2
Stock-Based Compensation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 01, 2016
$ / shares
shares
Jun. 30, 2016
USD ($)
item
$ / shares
shares
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
item
$ / shares
shares
Jun. 30, 2015
USD ($)
Dec. 31, 2015
$ / shares
shares
Jan. 01, 2016
shares
Jan. 01, 2015
shares
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Number of share-based employee compensation plans | item   2   2        
Common stock reserved for issuance   9,856,900   9,856,900        
Stock-based compensation expense | $   $ 3,976 $ 3,867 $ 7,520 $ 5,915      
Servicing and support                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Stock-based compensation expense | $   923 607 1,574 995      
Technology and content development                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Stock-based compensation expense | $   654 427 1,106 658      
Program marketing and sales                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Stock-based compensation expense | $   355 277 613 459      
General and administrative                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Stock-based compensation expense | $   $ 2,044 $ 2,556 $ 4,227 $ 3,803      
Stock options                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Option to purchase common stock, outstanding   5,358,182   5,358,182   5,298,510    
Weighted average exercise price | $ / shares   $ 10.06   $ 10.06   $ 8.07    
Granted (in shares)       712,286        
Restricted Stock Units                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Number of restricted stock units granted (in shares)       665,084        
Equity Incentive Plan 2014                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Period of annual automatic increase in the number of shares authorized           10 years    
Percentage applied on total number of shares of common stock outstanding on previous calendar year for automatic inclusion in the plan           5.00%    
Common stock reserved for issuance             2,288,820 2,036,503
Equity Incentive Plan 2014 | Stock options                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Exercise price (in dollars per share) | $ / shares $ 29.53              
Number of restricted stock units granted (in shares) 8,914              
Equity Incentive Plan 2014 | Restricted Stock Units                
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations                
Number of restricted stock units granted (in shares) 21,260