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Stock-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Payment Arrangement, Additional Disclosure [Abstract]    
Stock-based compensation expense $ 2,049 $ 517
Cost of services    
Share-based Payment Arrangement, Additional Disclosure [Abstract]    
Stock-based compensation expense 337 45
Selling and marketing    
Share-based Payment Arrangement, Additional Disclosure [Abstract]    
Stock-based compensation expense 237 115
General and administrative    
Share-based Payment Arrangement, Additional Disclosure [Abstract]    
Stock-based compensation expense $ 1,475 $ 357