CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenues	$ 14,120,000	$ 11,920,000
Cost of revenues	7,901,000	6,522,000
Gross margin	6,219,000	5,398,000
Research and development expenses	2,180,000	1,950,000
Selling, general and administrative expenses	4,340,000	3,970,000
Amortization of intangibles	17,000	17,000
Loss from operations	(318,000)	(539,000)
Interest income and other	62,000	(88,000)
Loss before income taxes	(256,000)	(627,000)
Income tax benefit	(83,000)	(413,000)
Net loss	$ (173,000)	$ (214,000)
Net loss per share – Basic	$ (0.02)	$ (0.03)
Net loss per share – Diluted	$ (0.02)	$ (0.03)
Weighted average shares outstanding – Basic	6,986	6,912
Weighted average shares outstanding – Diluted	6,986	6,912