v3.4.0.3
Stock-Based Compensation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jul. 01, 2015
$ / shares
shares
Mar. 31, 2016
USD ($)
item
$ / shares
shares
Mar. 31, 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        
Common stock reserved for issuance   10,225,560        
Stock-based compensation expense | $   $ 3,544 $ 2,048      
Servicing and support            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Stock-based compensation expense | $   651 388      
Technology and content development            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Stock-based compensation expense | $   452 231      
Program marketing and sales            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Stock-based compensation expense | $   258 182      
General and administrative            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Stock-based compensation expense | $   $ 2,183 $ 1,247      
Stock options            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Option to purchase common stock, outstanding   5,019,640   5,298,510    
Weighted average exercise price | $ / shares   $ 8.33   $ 8.07    
Granted (in shares)   3,617        
Restricted Stock Units            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Number of restricted stock units granted (in shares)   8,177        
2014 Equity Incentive Plan            
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
2014 Equity Incentive Plan | Stock options            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Exercise price (in dollars per share) | $ / shares $ 22.67          
Number of restricted stock units granted (in shares) 669,013          
2014 Equity Incentive Plan | Restricted Stock Units            
Stock-based compensation expense included in the unaudited condensed consolidated statements of operations            
Number of restricted stock units granted (in shares) 626,135