Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 82,210	$ 58,900
Cost of revenue	25,280	20,889
Gross profit	56,930	38,011
Operating expenses:
Sales and marketing	34,527	29,588
Research and development	18,079	14,172
General and administrative	22,562	15,911
Total operating expenses	75,168	59,671
Operating loss	(18,238)	(21,660)
Other expense, net:
Interest and investment income	133	1,573
Interest expense	(6,560)	(5,922)
Loss on extinguishment of convertible notes and capped call modification	(2,888)
Other expense, net	(49)	(77)
Total other expense, net	(9,364)	(4,426)
Loss before income taxes	(27,602)	(26,086)
Benefit from income taxes	5,813	701
Net loss	$ (21,789)	$ (25,385)
Net loss per share attributable to common stockholders:
Basic	$ (0.60)	$ (0.74)
Diluted	$ (0.60)	$ (0.74)
Weighted-average common shares outstanding:
Basic	36,386,819	34,075,071
Diluted	36,386,819	34,075,071