CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 5,663	$ 7,256
Cost of revenue
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	221	165
Sales and marketing
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	938	620
Research and development
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	320	453
General and administrative
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 4,184	$ 6,018