CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 8,282	$ 7,865	$ 13,945	$ 15,121
Cost of revenue
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	264	153	485	318
Sales and marketing
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	1,136	752	2,074	1,372
Research and development
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	363	269	683	722
General and administrative
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 6,519	$ 6,691	$ 10,703	$ 12,709