CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Revenue	$ 27,374,000	$ 24,564,000	$ 74,485,000	$ 75,094,000
Costs and expenses:
Cost of revenue	3,355,000	3,373,000	9,539,000	10,171,000
Research and development	5,444,000	4,742,000	15,102,000	13,638,000
Sales and marketing	17,368,000	19,294,000	51,804,000	61,138,000
General and administrative	17,479,000	18,147,000	53,269,000	58,419,000
Gain from litigation settlement	0	0	(7,500,000)	(46,000,000)
Total costs and expenses	43,646,000	45,556,000	122,214,000	97,366,000
Loss from operations	(16,272,000)	(20,992,000)	(47,729,000)	(22,272,000)
Interest (expense) income, net	(1,560,000)	242,000	(3,952,000)	688,000
Change in fair value of common stock warrant liabilities	0	0	0	11,000
Other income (expense), net	430,000	(333,000)	(766,000)	(78,000)
Loss before income taxes	(17,402,000)	(21,083,000)	(52,447,000)	(21,651,000)
Provision for income taxes	40,000.0	32,000.0	59,000.0	142,000.0
Net loss	$ (17,442,000)	$ (21,115,000)	$ (52,506,000)	$ (21,793,000)
Loss per share:
Basic (in dollars per share)	$ (1.14)	$ (1.20)	$ (3.35)	$ (1.22)
Diluted (in dollars per share)	$ (1.14)	$ (1.20)	$ (3.35)	$ (1.22)
Weighted average shares outstanding:
Basic (in shares)	15,308,114	17,531,790	15,692,623	17,928,062
Diluted (in shares)	15,308,114	17,531,790	15,692,623	17,928,062
Other comprehensive income:
Change in unrealized gain on available-for-sale investments, net of tax	$ 0	$ 0	$ 0	$ 7,000
Total other comprehensive income	0	0	0	7,000
Total comprehensive loss	$ (17,442,000)	$ (21,115,000)	$ (52,506,000)	$ (21,786,000)