Condensed Statements of Income and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Total revenue	$ 15,747	$ 14,707	$ 30,593	$ 29,054
Total cost of sales	6,554	6,116	12,970	12,140
Gross profit	9,193	8,591	17,623	16,914
Operating expenses:
Research and development	2,708	2,699	5,907	5,135
General and administrative	3,507	2,860	6,727	5,589
Sales and marketing	1,355	1,292	2,670	2,426
Total operating expenses	7,570	6,851	15,304	13,150
Income from operations	1,623	1,740	2,319	3,764
Interest expense		(70)	(63)	(145)
Other income (expense), net	2,262	1	2,390	(13)
Net income before income taxes	3,885	1,671	4,646	3,606
Net income and comprehensive income	$ 3,885	$ 1,671	$ 4,646	$ 3,606
Net income per common share, Basic	$ 0.19	$ 0.08	$ 0.23	$ 0.18
Net income per common share, Diluted	$ 0.18	$ 0.08	$ 0.22	$ 0.17
Weighted average shares of common stock outstanding, basic	20,657,404	20,069,444	20,554,769	19,983,526
Weighted average shares of common stock outstanding, diluted	21,234,253	20,424,283	21,068,059	20,626,547
Product sales
Total revenue	$ 13,406	$ 13,223	$ 27,183	$ 25,894
Total cost of sales	6,090	5,793	12,213	11,545
Licensing, royalty, patent and other revenue
Total revenue	2,341	1,484	3,410	3,160
Total cost of sales	$ 464	$ 323	$ 757	$ 595