CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 102,518	$ 85,026	$ 204,900	$ 169,878
Cost of revenue	56,466	40,320	110,381	77,814
Gross profit	46,052	44,706	94,519	92,064
Operating expenses:
Research and development	38,717	30,346	79,154	59,334
Sales and marketing	46,760	36,334	88,240	71,206
General and administrative	29,543	35,494	59,097	68,955
Total operating expenses	115,020	102,174	226,491	199,495
Loss from operations	(68,968)	(57,468)	(131,972)	(107,431)
Net gain on extinguishment of debt	54,391	0	54,391	0
Interest income	1,502	276	2,183	450
Interest expense	(1,530)	(1,436)	(3,152)	(2,097)
Other income (expense)	(1,673)	178	(1,952)	114
Loss before income taxes	(16,278)	(58,450)	(80,502)	(108,964)
Income tax expense (benefit)	159	(155)	199	14
Net loss	$ (16,437)	$ (58,295)	$ (80,701)	$ (108,978)
Net loss per share attributable to common stockholders, basic (in US dollar per share)	$ (0.14)	$ (0.51)	$ (0.67)	$ (0.95)
Net loss per share attributable to common stockholders, diluted (in US dollar per share)	$ (0.14)	$ (0.51)	$ (0.67)	$ (0.95)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	121,242	115,326	120,295	114,733
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	121,242	115,326	120,295	114,733