CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 8,416	$ 8,013	$ 22,361	$ 23,134
Cost of revenue
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	327	156	812	474
Sales and marketing
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	1,259	717	3,333	2,089
Research and development
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	427	287	1,110	1,009
General and administrative
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 6,403	$ 6,853	$ 17,106	$ 19,562