Condensed Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenue	$ 23,520	$ 19,256	$ 46,044	$ 37,380
Cost of goods sold	5,388	5,122	10,570	9,903
Gross profit	18,132	14,134	35,474	27,477
Operating expenses
Sales and marketing	12,043	9,756	23,046	19,789
Research and development	6,845	6,065	14,285	11,849
General and administrative	6,068	4,543	10,114	9,614
Total operating expenses	24,956	20,364	47,445	41,252
Loss from operations	(6,824)	(6,230)	(11,971)	(13,775)
Interest income	718	762	1,511	1,589
Interest expense	(2,059)	(2,166)	(4,212)	(4,424)
Other income (expense), net	(486)	120	(568)	171
Net loss and comprehensive loss	$ (8,651)	$ (7,514)	$ (15,240)	$ (16,439)
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.26)	$ (0.26)	$ (0.47)	$ (0.58)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.26)	$ (0.26)	$ (0.47)	$ (0.58)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	32,863,031	28,853,216	32,175,789	28,569,196
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	32,863,031	28,853,216	32,175,789	28,569,196