CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 7,256	$ 5,239
Cost of revenue
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	165	77
Sales and marketing
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	620	300
Research and development
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	453	370
General and administrative
Includes stock-based compensation expense as follows:
Total stock-based compensation expense	$ 6,018	$ 4,492