CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 11,920	$ 19,114
Cost of revenues	6,522	11,170
Gross margin	5,398	7,944
Research and development expenses	1,950	2,030
Selling, general and administrative expenses	3,970	3,506
Amortization of intangibles	17	17
Income (loss) from operations	(539)	2,391
Interest income and other	(88)	(85)
Income (loss) before income taxes	(627)	2,306
Income tax provision (benefit)	(413)	43
Net income (loss)	$ (214)	$ 2,263
Net income (loss) per share – Basic (in dollars per share)	$ (0.03)	$ 0.33
Net income (loss) per share – Diluted (in dollars per share)	$ (0.03)	$ 0.33
Weighted average shares outstanding – Basic (in shares)	6,912	6,777
Weighted average shares outstanding – Diluted (in shares)	6,912	6,835