CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 27,569,000	$ 25,204,000	$ 51,815,000	$ 42,936,000
Cost of revenues	14,159,000	14,095,000	26,811,000	23,448,000
Gross margin	13,410,000	11,109,000	25,004,000	19,488,000
Research and development expenses	3,069,000	2,753,000	5,998,000	5,514,000
Selling, general and administrative expenses	5,359,000	4,695,000	10,060,000	8,583,000
Income from operations	4,982,000	3,661,000	8,946,000	5,391,000
Interest income and other	39,000	38,000	124,000	60,000
Income before income taxes	5,021,000	3,699,000	9,070,000	5,451,000
Income tax expense	632,000	590,000	1,090,000	901,000
Net income	$ 4,389,000	$ 3,109,000	$ 7,980,000	$ 4,550,000
Net income per share – Basic	$ 0.59	$ 0.43	$ 1.08	$ 0.62
Net income per share – Diluted	$ 0.58	$ 0.41	$ 1.05	$ 0.61
Weighted average shares outstanding – Basic	7,404	7,299	7,398	7,296
Weighted average shares outstanding – Diluted	7,603	7,517	7,592	7,490