Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 287,921	$ 404,127	$ 418,515
Cost and operating expenses:
Cost of revenue	22,455	23,980	23,949
Sales and marketing	240,131	349,255	354,990
Research and development	27,591	31,713	35,732
General and administrative	26,301	28,102	24,703
Restructuring and other charges	23,568
Acquisition-related costs	(150)	(4,135)	1,065
Total cost and operating expenses	339,896	428,915	440,439
Loss from operations	(51,975)	(24,788)	(21,924)
Other income (expense):
Interest income	1,251	349	37
Other income (expense), net	14	23	(57)
Total other income (expense), net	1,265	372	(20)
Loss before income taxes	(50,710)	(24,416)	(21,944)
Income tax (expense) benefit	(577)		2,510
Net loss	$ (51,287)	$ (24,416)	$ (19,434)
Net loss per share, basic	$ (1.54)	$ (0.77)	$ (0.67)
Net loss per share, diluted	$ (1.54)	$ (0.77)	$ (0.67)
Weighted average common shares outstanding, basic	33,350	31,613	29,088
Weighted average common shares outstanding, diluted	33,350	31,613	29,088
Net loss	$ (51,287)	$ (24,416)	$ (19,434)
Other comprehensive income (loss):
Foreign currency translation adjustment	35	(16)	17
Comprehensive loss	$ (51,252)	$ (24,432)	$ (19,417)