Condensed Statements of Income and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Total revenue	$ 16,466	$ 15,241	$ 47,059	$ 44,295
Total cost of sales	6,547	6,277	19,517	18,417
Gross profit	9,919	8,964	27,542	25,878
Operating expenses:
Research and development	2,659	2,879	8,566	8,014
General and administrative	3,933	2,971	10,660	8,560
Sales and marketing	1,348	1,203	4,018	3,629
Total operating expenses	7,940	7,053	23,244	20,203
Income from operations	1,979	1,911	4,298	5,675
Interest expense		(73)	(63)	(218)
Other income (expense), net	459	69	2,849	56
Net income before income taxes	2,438	1,907	7,084	5,513
Net income and comprehensive income	$ 2,438	$ 1,907	$ 7,084	$ 5,513
Net income per common share, Basic	$ 0.12	$ 0.09	$ 0.34	$ 0.27
Net income per common share, Diluted	$ 0.11	$ 0.09	$ 0.33	$ 0.27
Weighted average shares of common stock outstanding, basic	20,848,558	20,206,728	20,653,775	20,058,744
Weighted average shares of common stock outstanding, diluted	21,828,789	20,539,064	21,276,904	20,698,814
Product sales
Total revenue	$ 13,543	$ 14,571	$ 40,726	$ 40,465
Total cost of sales	5,920	6,122	18,133	17,667
Licensing, royalty, patent and other revenue
Total revenue	2,923	670	6,333	3,830
Total cost of sales	$ 627	$ 155	$ 1,384	$ 750