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Stock-based Awards (Details 3 - Stock comp by FSLI) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Stock-based Compensation Cost        
Stock-based compensation expense $ 5,900 $ 9,167 $ 11,792 $ 18,620
Amount capitalized to internal software use 223 344 468 675
Total stock-based compensation cost 6,123 9,511 12,260 19,295
Cost of revenue        
Stock-based Compensation Cost        
Stock-based compensation expense 233 187 455 364
Sales and marketing        
Stock-based Compensation Cost        
Stock-based compensation expense 1,736 1,218 2,499 2,608
Technology and development        
Stock-based Compensation Cost        
Stock-based compensation expense 746 1,227 1,825 2,153
General and administrative        
Stock-based Compensation Cost        
Stock-based compensation expense $ 3,185 $ 6,535 $ 7,013 $ 13,495