CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 25,585	$ 22,194	$ 48,024	$ 42,636
Cost of goods sold	3,465	2,375	6,448	4,575
Gross profit	22,120	19,819	41,576	38,061
Operating expenses:
Sales and marketing	28,843	23,084	54,448	44,006
Research and development	3,478	3,149	7,058	6,104
General and administrative	7,680	6,551	14,819	12,491
Total operating expenses	40,001	32,784	76,325	62,601
Loss from operations	(17,881)	(12,965)	(34,749)	(24,540)
Interest and other income (expense), net:
Interest income	136	46	209	107
Interest expense	(622)	(1,075)	(1,183)	(2,139)
Other income (expense), net	(146)	13	(200)	349
Net loss	(18,513)	(13,981)	(35,923)	(26,223)
Other comprehensive income (loss):
Changes in foreign currency translation	(14)	35	(14)	(80)
Unrealized gain (loss) on marketable securities	(58)	(5)	(306)	16
Comprehensive loss	$ (18,585)	$ (13,951)	$ (36,243)	$ (26,287)
Net loss per share, basic (in usd per share)	$ (0.54)	$ (0.42)	$ (1.06)	$ (0.80)
Net loss per share, diluted (in usd per share)	$ (0.54)	$ (0.42)	$ (1.06)	$ (0.80)
Weighted-average number of common shares used to compute basic net loss per share (in shares)	34,052,692	32,978,914	33,923,229	32,836,040
Weighted-average number of common shares used to compute diluted net loss per share (in shares)	34,052,692	32,978,914	33,923,229	32,836,040