CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenues	$ 11,828,000	$ 15,040,000	$ 40,157,000	$ 52,785,000
Cost of revenues	6,236,000	8,399,000	21,434,000	30,055,000
Gross margin	5,592,000	6,641,000	18,723,000	22,730,000
Research and development expenses	1,947,000	1,997,000	5,892,000	6,137,000
Selling, general and administrative expenses	3,793,000	3,491,000	11,821,000	11,028,000
Amortization of intangibles	15,000	16,000	50,000	50,000
Income (loss) from operations	(163,000)	1,137,000	960,000	5,515,000
Interest income and other	(25,000)	56,000	(141,000)	69,000
Income (loss) before income taxes	(188,000)	1,193,000	819,000	5,584,000
Income tax provision (benefit)	(116,000)	21,000	10,000	108,000
Net income (loss)	$ (72,000)	$ 1,172,000	$ 809,000	$ 5,476,000
Net income (loss) per share – Basic	$ (0.01)	$ 0.17	$ 0.12	$ 0.80
Net income (loss) per share – Diluted	$ (0.01)	$ 0.16	$ 0.11	$ 0.78
Weighted average shares outstanding – Basic	6,959	6,859	6,939	6,813
Weighted average shares outstanding – Diluted	6,959	7,154	7,041	7,013