Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Series A Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
Beginning balances at Dec. 31, 2014	$ 308,509	$ 909	$ 70	$ 376,297	$ (583)	$ (68,137)	$ (96)	$ 49
Beginning balances, shares at Dec. 31, 2014		90,973	70,109,488				29,990
Vesting of restricted stock units, shares			227,382
Stock-based compensation	1,082			1,082
Common stock issued as payment for MPUs	358			358
Common stock issued as payment for MPUs, shares			54,801
Series A convertible preferred stock dividend		$ 9				(9)
Series A convertible preferred stock dividend, shares		902
Exercise of stock options	244			244
Exercise of stock options, shares			50,000
Net income (loss)	(2,737)					(2,873)		136
Foreign currency translation adjustments	(488)				(548)			60
Ending balances at Mar. 31, 2015	306,968	$ 918	$ 70	377,981	(1,131)	(71,019)	$ (96)	245
Ending balances, shares at Mar. 31, 2015		91,875	70,441,671				29,990
Beginning balances at Dec. 31, 2015	299,756	$ 357	$ 71	381,659	(1,174)	(81,424)	$ (96)	363
Beginning balances, shares at Dec. 31, 2015		35,759	70,613,642				29,990
Vesting of restricted stock units, shares			250,859
Stock-based compensation	1,249			1,249
Conversion of preferred stock to common stock		$ (6)		6
Conversion of preferred stock to common stock, shares		(586)	976
Exercise of SARs, shares			9,740
Net income (loss)	(2,077)					(2,096)		19
Foreign currency translation adjustments	501				514			(13)
Ending balances at Mar. 31, 2016	$ 299,429	$ 351	$ 71	$ 382,914	$ (660)	$ (83,520)	$ (96)	$ 369
Ending balances, shares at Mar. 31, 2016		35,173	70,875,217				29,990