Stock-Based Compensation and Stockholders' Equity - Schedule of Compensation Expense Allocation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense (benefit)	$ 2,340	$ 1,289	$ 6,232	$ (4,195)
Cost of services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense (benefit)	156	70	320	(176)
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense (benefit)	1,060	349	2,686	30
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock compensation expense (benefit)	$ 1,124	$ 870	$ 3,226	$ (4,049)