CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenue	$ 26,432	$ 22,286	$ 74,456	$ 64,922
Cost of goods sold	4,168	2,478	10,616	7,053
Gross profit	22,264	19,808	63,840	57,869
Operating expenses:
Sales and marketing	25,669	23,525	80,117	67,531
Research and development	3,089	3,288	10,147	9,392
General and administrative	7,072	6,194	21,891	18,685
Total operating expenses	35,830	33,007	112,155	95,608
Loss from operations	(13,566)	(13,199)	(48,315)	(37,739)
Interest and other income (expense), net:
Interest income	346	44	555	151
Interest expense	(755)	(2,658)	(1,938)	(4,797)
Other income (expense), net	(183)	(59)	(383)	290
Net loss	(14,158)	(15,872)	(50,081)	(42,095)
Other comprehensive income (loss):
Changes in foreign currency translation	25	(23)	11	(103)
Unrealized gain (loss) on marketable securities	100	(11)	(206)	5
Comprehensive loss	$ (14,033)	$ (15,906)	$ (50,276)	$ (42,193)
Net loss per share, basic (in usd per share)	$ (0.41)	$ (0.48)	$ (1.47)	$ (1.28)
Net loss per share, diluted (in usd per share)	$ (0.41)	$ (0.48)	$ (1.47)	$ (1.28)
Weighted-average number of common shares used to compute basic net loss per share (in shares)	34,356,850	33,340,093	34,069,357	33,005,904
Weighted-average number of common shares used to compute diluted net loss per share (in shares)	34,356,850	33,340,093	34,069,357	33,005,904