Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Operations and Comprehensive Loss
Revenue	$ 29,463	$ 18,213	$ 15,446
Cost of revenue (excluding amortization of intangible assets)	10,346	6,675	5,870
Amortization of intangible assets	304	304	304
Gross profit	18,813	11,234	9,272
Operating expenses:
Sales and marketing	29,062	22,111	18,060
General and administrative	12,459	10,143	6,223
Research and development	6,743	4,255	4,151
Total operating expenses	48,264	36,509	28,434
Loss from operations	(29,451)	(25,275)	(19,162)
Other (expense) income:
Interest expense	(3,597)	(3,564)	(3,609)
Change in fair value of preferred stock warrant liability			(5)
Other (expense) income	(228)	45	351
Total other expense	(3,825)	(3,519)	(3,263)
Net loss	(33,276)	(28,794)	(22,425)
Accretion of redeemable convertible preferred stock to redemption value			(7,783)
Net loss attributable to common stockholders	$ (33,276)	$ (28,794)	$ (30,208)
Net loss per common share, basic	$ (2.30)	$ (2.23)	$ (17.10)
Net loss per common share, diluted	$ (2.30)	$ (2.23)	$ (17.10)
Weighted average common shares outstanding, basic	14,473,213	12,934,421	1,766,412
Weighted average common shares outstanding, diluted	14,473,213	12,934,421	1,766,412
Comprehensive loss:
Net loss	$ (33,276)	$ (28,794)	$ (22,425)
Foreign currency translation adjustment	19	(52)	(15)
Unrealized loss on short-term investments			(4)
Comprehensive loss	$ (33,257)	$ (28,846)	$ (22,444)