CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenues	$ 24,246,000	$ 17,732,000
Cost of revenues	12,652,000	9,353,000
Gross margin	11,594,000	8,379,000
Research and development expenses	2,929,000	2,761,000
Selling, general and administrative expenses	4,701,000	3,888,000
Income from operations	3,964,000	1,730,000
Interest income and other	85,000	22,000
Income before income taxes	4,049,000	1,752,000
Income tax expense	458,000	311,000
Net income	$ 3,591,000	$ 1,441,000
Net income per share – Basic	$ 0.49	$ 0.2
Net income per share – Diluted	$ 0.47	$ 0.19
Weighted average shares outstanding – Basic	7,393	7,293
Weighted average shares outstanding – Diluted	7,581	7,463