Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Revenues	$ 53,333	$ 66,240	$ 41,130
Cost of revenues	28,573	37,185	22,989
Gross margin	24,760	29,055	18,141
Research and development expenses	8,022	8,040	7,602
Selling, general and administrative expenses	15,657	14,796	12,635
Amortization of intangibles	66	66	67
Income (loss) from operations	1,015	6,153	(2,163)
Interest income and other	(107)	238	102
Income (loss) before income taxes	908	6,391	(2,061)
Income tax provision (benefit)	(404)	(5,171)	28
Net income (loss)	$ 1,312	$ 11,562	$ (2,089)
Net income (loss) per share - Basic (in usd per share)	$ 0.19	$ 1.69	$ (0.31)
Net income (loss) per share - Diluted (in usd per share)	$ 0.19	$ 1.64	$ (0.31)
Weighted average shares outstanding – Basic, shares	6,946	6,832	6,706
Weighted average shares outstanding – Diluted, shares	7,075	7,049	6,706