Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net revenue:
Total net revenue	$ 231,270	$ 147,683	$ 181,712
Cost of revenue:
Total cost of revenue	98,165	71,911	83,549
Gross profit	133,105	75,772	98,163
Operating expenses:
Sales and marketing	76,762	52,766	71,109
Research and development	21,568	14,322	15,085
General and administrative	32,945	31,512	24,033
Total operating expenses	131,275	98,600	110,227
Income (loss) from operations	1,830	(22,828)	(12,064)
Interest and other income (expense), net:
Amortization of debt issuance costs	(710)	0	0
Interest on convertible notes	(2,514)	0	0
Gain on extinguishment of PPP loan	7,185	0	0
Other expense, net	(2,406)	(579)	(199)
Total interest and other income (expense), net	1,555	(579)	(199)
Income (loss) before income taxes	3,385	(23,407)	(12,263)
Income tax provision	1,323	470	85
Net income (loss)	$ 2,062	$ (23,877)	$ (12,348)
Earnings Per Share [Abstract]
Basic (USD per share)	$ 0.12	$ (1.43)	$ (0.88)
Diluted (USD per share)	$ 0.11	$ (1.43)	$ (0.88)
Denominator:
Basic (in shares)	17,891	16,691	14,096
Diluted (in shares)	18,362	16,691	14,096
Products
Net revenue:
Total net revenue	$ 205,703	$ 125,113	$ 158,638
Cost of revenue:
Total cost of revenue	83,048	58,325	64,693
Service
Net revenue:
Total net revenue	25,567	22,570	23,074
Cost of revenue:
Total cost of revenue	$ 15,117	$ 13,586	$ 18,856