Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net revenue	$ 137,373	$ 104,091	$ 407,906	$ 280,881
Cost of goods sold	57,709	40,111	166,407	114,125
Gross profit	79,664	63,980	241,499	166,756
Selling, general, and administrative expenses	171,643	105,315	339,264	217,271
Loss from operations	(91,979)	(41,335)	(97,765)	(50,515)
Interest and other (loss), net	(146)	(81)	(452)	(626)
Loss before income taxes	(92,125)	(41,416)	(98,217)	(51,141)
Provision for income taxes	(1,052)	196	151	478
Net loss	(91,073)	(41,612)	(98,368)	(51,619)
Deemed dividend upon redemption of redeemable convertible preferred stock	0	0	(13,137)	0
Net loss attributable to common stockholders, basic	(91,073)	(41,612)	(111,505)	(51,619)
Net loss attributable to common stockholders, diluted	$ (91,073)	$ (41,612)	$ (111,505)	$ (51,619)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (1.45)	$ (0.78)	$ (1.96)	$ (0.98)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (1.45)	$ (0.78)	$ (1.96)	$ (0.98)
Weighted average shares used in computing net loss per share attributable to common stockholders, basic	62,887,161	53,179,523	56,985,960	52,818,555
Weighted average shares used in computing net loss per share attributable to common stockholders, diluted	62,887,161	53,179,523	56,985,960	52,818,555
Other comprehensive loss
Foreign currency translation adjustment	$ (129)	$ 67	$ (58)	$ (78)
Total comprehensive loss	$ (91,202)	$ (41,545)	$ (98,426)	$ (51,697)