CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated other comprehensive gain [Member]	Accumulated deficit [Member]	Total
Beginning balance, shares at Dec. 31, 2012	5,547,000	266,000
Beginning balance, value at Dec. 31, 2012	$ 0	$ 1,074	$ 4,468	$ 2,016	$ (81,917)	$ 31,008
Public offering of common stock, net, shares		3,600,000
Public offering of common stock, net, value		$ 3	31,445			31,448
Convert preferred stock common stock upon public offering, shares	(5,601,000)	8,739,000
Convert preferred stock common stock upon public offering, value	$ (105,801)	$ (1,211)	107,012
Stock options exercised, shares		29,000
Stock options exercised, value		$ 87	86			173
Warrants exercised, shares issued	54,000	10,000
Warrants exercised, value	$ 434	$ 60				494
Stock based compensation			1,012			1,012
Net income (loss)					(1,406)	(1,406)
Foreign currency translation adjustment				348		348
Ending balance, shares at Dec. 31, 2013	0	12,644,000
Ending balance, value at Dec. 31, 2013	$ 0	$ 13	144,023	2,364	(83,323)	63,077
Public offering of common stock, net, shares		2,025,000
Public offering of common stock, net, value		$ 2	45,679			45,681
Issuance of shares under equity plans, shares		33,000
Stock options exercised, shares		103,000
Stock options exercised, value			365			365
Warrants exercised, shares issued		19,000
Stock based compensation			2,045			2,045
Net income (loss)					4,283	4,283
Foreign currency translation adjustment				(439)		(439)
Ending balance, shares at Dec. 31, 2014	0	14,824,000
Ending balance, value at Dec. 31, 2014	$ 0	$ 15	192,112	1,925	(79,040)	115,012
Public offering of common stock, net, shares		1,857,000
Public offering of common stock, net, value		$ 2	38,646			38,648
Issuance of shares under equity plans, shares		77,000
Stock options exercised, shares		81,000
Stock options exercised, value			452			452
Stock based compensation			2,120			2,120
Net income (loss)					10,793	10,793
Foreign currency translation adjustment				(1,633)		(1,633)
Other			6			6
Ending balance, shares at Dec. 31, 2015	0	16,839,000
Ending balance, value at Dec. 31, 2015	$ 0	$ 17	$ 233,336	$ 292	$ (68,247)	$ 165,398