Consolidated Statements Of Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2013	$ 5,727	$ 16,434	$ (8,522)	$ (331)		$ 13,308
Balance, shares at Dec. 31, 2013	5,727,000
Exercise of stock options	$ 100	(43)				$ 57
Exercise of stock options, shares	100,000					205,000
Shares issued under the ESPP	$ 16	84				$ 100
Shares issued under the ESPP, shares	16,000
Shares issued in lieu of cash for services	$ 1	7				$ 8
Shares issued in lieu of cash for services, shares	1,000					0
Stock-based compensation		457				$ 457
Net income (loss)			2,248			2,248
Comprehensive loss				(71)		(71)
Balance at Dec. 31, 2014	$ 5,844	16,939	(6,274)	(402)		16,107
Balance, shares at Dec. 31, 2014	5,844,000
Exercise of stock options	$ 123	112				$ 235
Exercise of stock options, shares	123,000					159,000
Shares issued under the ESPP	$ 14	91				$ 105
Shares issued under the ESPP, shares	14,000
Shares issued in lieu of cash for services, shares						0
Stock-based compensation		579				$ 579
Net income (loss)			2,228		$ (111)	2,117
Investment by non-controlling interest					73	73
Comprehensive loss				(319)		(319)
Balance at Dec. 31, 2015	$ 5,981	17,721	(4,046)	(721)	(38)	18,897
Balance, shares at Dec. 31, 2015	5,981,000
Exercise of stock options	$ 16	11				$ 27
Exercise of stock options, shares	16,000					61,000
Shares issued in equity offering	$ 805	2,873				$ 3,678
Shares issued in equity offering, shares	805,000					805,000
Shares issued under the ESPP	$ 18	93				$ 111
Shares issued under the ESPP, shares	18,000
Shares issued in lieu of cash for services, shares						0
Stock-based compensation		685				$ 685
Net income (loss)			(4,587)		(157)	(4,744)
Investment by non-controlling interest					650	650
Comprehensive loss				(293)		(293)
Balance at Dec. 31, 2016	$ 6,820	$ 21,383	$ (8,633)	$ (1,014)	$ 455	$ 19,011
Balance, shares at Dec. 31, 2016	6,820,000