Condensed consolidated statements of operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue:
Total revenue	$ 7,604	$ 6,145	$ 19,833	$ 16,182
Costs and operating expenses:
Research and development	3,609	3,116	11,195	9,502
Sales and marketing	3,376	3,498	10,284	10,161
General and administrative	5,676	6,204	17,121	19,399
Total costs and operating expenses	19,643	20,594	59,523	60,557
Loss from operations	(12,039)	(14,449)	(39,690)	(44,375)
Other income (expense):
Interest income, net	768	1,093	2,589	3,169
Other expense, net	(39)	(26)	(91)	(66)
Total other income, net	729	1,067	2,498	3,103
Loss before income taxes	(11,310)	(13,382)	(37,192)	(41,272)
Income tax expense	13	10	31	23
Net loss	$ (11,323)	$ (13,392)	$ (37,223)	$ (41,295)
Net loss per share - basic (in dollars per share)	$ (0.26)	$ (0.31)	$ (0.86)	$ (0.96)
Net loss per share - diluted (in dollars per share)	$ (0.26)	$ (0.31)	$ (0.86)	$ (0.96)
Weighted average common shares outstanding - basic (in shares)	43,668,656	43,080,095	43,510,911	42,985,184
Weighted average common shares outstanding - diluted (in shares)	43,668,656	43,080,095	43,510,911	42,985,184
Product
Revenue:
Total revenue	$ 5,255	$ 4,200	$ 13,505	$ 10,693
Costs and operating expenses:
Cost of revenue	5,314	5,691	15,404	15,361
Service
Revenue:
Total revenue	2,349	1,945	6,328	5,489
Costs and operating expenses:
Cost of revenue	$ 1,668	$ 2,085	$ 5,519	$ 6,134