Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net revenue:
Total net revenue	$ 57,384	$ 39,132	$ 165,641	$ 97,740
Cost of revenue:
Total cost of revenue	23,959	17,386	70,717	50,034
Gross profit	33,425	21,746	94,924	47,706
Operating expenses:
Sales and marketing	19,190	12,286	52,668	38,109
Research and development	5,802	3,432	14,764	10,294
General and administrative	7,807	7,239	23,633	23,575
Total operating expenses	32,799	22,957	91,065	71,978
Income (loss) from operations	626	(1,211)	3,859	(24,272)
Interest and other income (expense), net:
Amortization of debt issuance costs	(225)	0	(492)	0
Interest on convertible notes	(768)	0	(1,737)	0
Gain on extinguishment of PPP loan	0	0	7,185	0
Other expense, net	(561)	(382)	(1,976)	(586)
Total interest and other income (expense), net	(1,554)	(382)	2,980	(586)
Income (loss) before income taxes	(928)	(1,593)	6,839	(24,858)
Income tax expense	462	664	842	1,207
Net income (loss)	$ (1,390)	$ (2,257)	$ 5,997	$ (26,065)
Net income (loss) per share:
Basic (USD per share)	$ (0.08)	$ (0.13)	$ 0.34	$ (1.59)
Diluted (USD per share)	$ (0.08)	$ (0.13)	$ 0.33	$ (1.59)
Weighted-average number of shares used in per share calculations:
Basic (in shares)	17,945	17,603	17,860	16,368
Diluted (in shares)	17,945	17,603	18,327	16,368
Total product revenue
Net revenue:
Total net revenue	$ 50,694	$ 33,254	$ 146,056	$ 81,390
Cost of revenue:
Total cost of revenue	20,259	14,017	59,483	40,326
Service
Net revenue:
Total net revenue	6,690	5,878	19,585	16,350
Cost of revenue:
Total cost of revenue	$ 3,700	$ 3,369	$ 11,234	$ 9,708