Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Revenue	$ 17,511	$ 15,505	$ 46,951	$ 48,585
Cost of revenue	8,143	6,904	21,711	21,414
Gross profit	9,368	8,601	25,240	27,171
Operating expenses
Research and development	1,803	2,012	5,346	6,230
Selling, general and administrative	2,255	2,018	7,148	6,843
Total operating expenses	4,058	4,030	12,494	13,073
Income from operations	5,310	4,571	12,746	14,098
Other income (expense), net	550	53	1,504	(29)
Income before income taxes	5,860	4,624	14,250	14,069
Provision for income taxes	665	469	1,629	1,435
Net income	$ 5,195	$ 4,155	$ 12,621	$ 12,634
Net income per share:
Basic	$ 0.28	$ 0.23	$ 0.69	$ 0.70
Diluted	$ 0.28	$ 0.22	$ 0.68	$ 0.68
Weighted average shares outstanding used in computing net income per share
Basic	18,353,552	18,152,849	18,293,535	18,081,235
Diluted	18,647,809	18,598,601	18,608,773	18,555,119
Comprehensive income:
Net income	$ 5,195	$ 4,155	$ 12,621	$ 12,634
Other comprehensive income, net of tax:
Unrealized loss on available-for-sale debt securities, net of tax benefit of ($9), $16, ($9) and $37 for the three and nine months ended September 30, 2023 and 2022, respectively	17	(62)	18	(140)
Comprehensive income	$ 5,212	$ 4,093	$ 12,639	$ 12,494