CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenues	$ 16,409	$ 18,631	$ 28,329	$ 37,745
Cost of revenues	8,676	10,486	15,198	21,656
Gross margin	7,733	8,145	13,131	16,089
Research and development expenses	1,995	2,110	3,945	4,140
Selling, general and administrative expenses	4,058	4,031	8,028	7,537
Amortization of intangibles	18	17	35	34
Income from operations	1,662	1,987	1,123	4,378
Interest income and other	(28)	98	(116)	13
Income before income taxes	1,634	2,085	1,007	4,391
Income tax provision	539	44	126	87
Net income	$ 1,095	$ 2,041	$ 881	$ 4,304
Net income per share – Basic	$ 0.16	$ 0.30	$ 0.13	$ 0.63
Net income per share – Diluted	$ 0.15	$ 0.29	$ 0.12	$ 0.62
Weighted average shares outstanding – Basic	6,944	6,803	6,928	6,790
Weighted average shares outstanding – Diluted	7,253	7,051	7,083	6,943