Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Sales	$ 20,810	$ 11,360	$ 38,299	$ 20,301
Cost of sales	8,795	6,572	15,919	11,752
Gross profit	12,015	4,788	22,380	8,549
Operating expenses:
Selling, general and administrative	18,239	14,388	34,492	28,008
Research and development	7,401	6,192	14,608	12,911
Total operating expenses	25,640	20,580	49,100	40,919
Loss from operations	(13,625)	(15,792)	(26,720)	(32,370)
Other income (expense), net:
Interest expense	(1,568)	(1,136)	(3,075)	(2,196)
Interest and other income	1,777	196	3,168	242
Loss on extinguishment of term loan	(362)	0	(362)	0
Loss before income taxes	(13,778)	(16,732)	(26,989)	(34,324)
Income tax (benefit) expense	26	0	27	4
Net loss	(13,804)	(16,732)	(27,016)	(34,328)
Other comprehensive loss
Unrealized gain (loss) on short-term investments	(65)	(76)	19	(150)
Foreign currency translation loss	1	(9)	3	(13)
Total other comprehensive (loss) income	(64)	(85)	22	(163)
Comprehensive loss	$ (13,868)	$ (16,817)	$ (26,994)	$ (34,491)
Net loss per share:
Attributable to common stock, basic	$ (0.4)	$ (0.61)	$ (0.82)	$ (1.25)
Attributable to common stock, diluted	$ (0.4)	$ (0.61)	$ (0.82)	$ (1.25)
Weighted-average shares used in computing net loss per share:
Attributable to common stock, basic	34,498,265	27,559,908	33,075,585	27,493,130
Attributable to common stock, diluted	34,498,265	27,559,908	33,075,585	27,493,130