Unaudited Condensed Statements of Operations - 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	$ 14,726	$ 12,251	$ 32,726	$ 35,610
Operating expenses:
Costs of revenue	6,010	5,487	17,905	15,649
Selling, general and administrative expenses	14,151	11,528	39,206	32,739
Research and development expenses	2,382	1,740	7,175	5,035
Total operating expenses	22,543	18,755	64,286	53,423
Loss from operations	(7,817)	(6,504)	(31,560)	(17,813)
Interest expense	(618)	(678)	(1,822)	(1,986)
Other income, net	339	3	349	1
Net loss	$ (8,096)	$ (7,179)	$ (33,033)	$ (19,798)
Net loss per share, basic (in dollars per share)	$ (0.47)	$ (0.42)	$ (1.94)	$ (1.27)
Net loss per share, diluted (in dollars per share)	$ (0.47)	$ (0.42)	$ (1.94)	$ (1.27)
Weighted-average number of shares used to compute net loss per share, basic (in shares)	17,080,959	16,945,591	17,044,623	15,636,150
Weighted-average number of shares used to compute net loss per share, diluted (in shares)	17,080,959	16,945,591	17,044,623	15,636,150