CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 16,429,000	$ 14,976,000
Cost of revenues	9,146,000	7,950,000
Gross margin	7,283,000	7,026,000
Research and development expenses	2,395,000	2,293,000
Selling, general and administrative expenses	4,159,000	4,163,000
Income from operations	729,000	570,000
Interest income and other	264,000	59,000
Income before income taxes	993,000	629,000
Income tax expense	149,000	134,000
Net income	$ 844,000	$ 495,000
Net income per share – Basic	$ 0.12	$ 0.07
Net income per share – Diluted	$ 0.11	$ 0.07
Weighted average shares outstanding – Basic	7,157	7,100
Weighted average shares outstanding – Diluted	7,367	7,322