CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 19,356	$ 23,407
Cost of goods sold	7,643	9,770
Gross profit	11,713	13,637
Selling, general and administrative expenses	20,355	23,786
Operating loss	(8,642)	(10,149)
Other (expense) income, net	(84)	105
Change in fair value of financial instruments and other	100	(2,696)
Loss before provision for income taxes	(8,626)	(12,740)
Income tax expense	0	(34)
Net loss and comprehensive loss	$ (8,626)	$ (12,774)
Net loss per common share, basic (in usd per share)	$ (0.06)	$ (0.09)
Net loss per common share, diluted (in usd per share)	$ (0.06)	$ (0.09)
Weighted-average shares used in computing net loss per share, basic (in shares)	144,990,224	139,697,474
Weighted-average shares used in computing net loss per share, diluted (in shares)	144,990,224	139,697,474