Condensed Consolidated Statements of Changes in Equity (USD $) In Thousands, except Share data	Total	Series A Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Beginning balances at Dec. 31, 2012	$ 182,388	$ 1,612	$ 47	$ 248,469	$ 633	$ (67,956)	$ (96)	$ (321)
Beginning balances, shares at Dec. 31, 2012		161,359	46,783,568				29,990
Vesting of restricted stock units
Vesting of restricted stock units, shares			83,821
Stock-based compensation	600			600
Common stock issued as form of payment for MPUs
Conversion of Series A convertible preferred stock to common stock		(110)		110
Conversion of Series A convertible preferred stock to common stock, shares		(11,011)	18,345
Issuance of common stock in connection with the acquisition of Euroscan
Series A convertible preferred stock dividend		16				(16)
Series A convertible preferred stock dividend, shares		1,606
Exercise of SARs			31,160
Exercise of stock options	161			161
Exercise of stock options, shares			66,668
Net income (loss)	1,170					1,108		62
Foreign currency translation adjustments	(154)				(183)			29
Ending balances at Mar. 31, 2013	184,165	1,518	47	249,340	450	(66,864)	(96)	(230)
Ending balances, shares at Mar. 31, 2013		151,954	46,983,562				29,990
Beginning balances at Dec. 31, 2013	192,948	1,019	48	255,358	235	(63,416)	(96)	(200)
Beginning balances, shares at Dec. 31, 2013		102,054	48,216,480				29,990
Vesting of restricted stock units
Vesting of restricted stock units, shares		0	281,208				0
Stock-based compensation	838			838
Public offering of common stock, net of underwriters' discounts and commissions and offering costs	36,607		6	36,601
Public offering of common stock, net of underwriters' discounts and commissions and offering costs, Shares		0	6,325,000				0
Common stock issued as form of payment for MPUs	213			213
Common stock issued as form of payment for MPUs, shares			33,594				0
Conversion of Series A convertible preferred stock to common stock		(98)		98
Conversion of Series A convertible preferred stock to common stock, shares		(9,836)	16,387
Issuance of common stock in connection with the acquisition of Euroscan	2,243		1	2,242
Issuance of common stock in connection with the acquisition of Euroscan, shares			291,230
Series A convertible preferred stock dividend		10				(10)
Series A convertible preferred stock dividend, shares		1,014
Exercise of SARs			26,636
Exercise of stock options	62			62
Exercise of stock options, shares			20,792
Net income (loss)	(404)					(431)		27
Foreign currency translation adjustments					(1)			1
Ending balances at Mar. 31, 2014	$ 232,507	$ 931	$ 55	$ 295,412	$ 234	$ (63,857)	$ (96)	$ (172)
Ending balances, shares at Mar. 31, 2014		93,232	55,211,327				29,990