CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 68,823	$ 32,067
Cost of revenue	18,108	9,863
Gross profit	50,715	22,204
Operating expenses:
Research and development	13,997	8,994
Sales and marketing	27,655	14,643
General and administrative	15,846	14,114
Change in fair value of contingent consideration	84	674
Total operating expenses	57,582	38,425
Loss from operations	(6,867)	(16,221)
Other income, net	1,315	462
Loss before provision for income taxes	(5,552)	(15,759)
Provision for (benefit from) income taxes	21	(1,388)
Net loss	(5,573)	(14,371)
Accretion of redeemable convertible preferred stock	0	(41)
Net loss attributable to common stockholders	$ (5,573)	$ (14,412)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.06)	$ (0.79)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)	95,543	18,207