Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Euroscan Holding B.V. [Member]	Series A Convertible Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member] Euroscan Holding B.V. [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Euroscan Holding B.V. [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Noncontrolling Interests [Member]
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, shares				279,538
Stock-based compensation	2,580					2,580
Proceeds received from issuance of common stock in connection with public offering, net of underwriters' discounts and commissions and offering costs of $2,228	36,607			$ 6		36,601
Proceeds received from issuance of common stock in connection with public offering, net of underwriters' discounts and commissions and offering costs, shares				6,325,000
Common stock issued as payment for MPUs	213					213
Common stock issued as payment for MPUs, shares				33,594
Conversion of Series A convertible preferred stock to common stock			$ (147)			147
Conversion of Series A convertible preferred stock to common stock, shares			(14,850)	24,740
Issuance of common stock as consideration for acquisition of Euroscan	2,243	$ 2,243			$ 1		$ 2,242
Issuance of common stock in connection with the acquisition, shares					291,230
Series A convertible preferred stock dividend paid in kind			$ 19						(19)
Series A convertible preferred stock dividend paid in kind, shares			1,940
Exercise of SARs, shares				84,686
Exercise of stock options	62					62
Exercise of stock options, shares				20,792
Net income (loss)	1,044								939		105
Foreign currency translation adjustments	(425)							(488)			63
Ending balances at Sep. 30, 2014	235,272		$ 891	$ 55		297,203		(253)	(62,496)	$ (96)	(32)
Ending balances, shares at Sep. 30, 2014			89,144	55,276,060						29,990
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	3,222			$ 1		3,221
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 paid in kind			$ 27						(27)
Series A convertible preferred stock dividend paid in kind, shares			2,734
Exercise of SARs, shares				62,725
Exercise of stock options	244					244
Exercise of stock options, shares				50,000
Net income (loss)	(13,315)								(13,490)		175
Foreign currency translation adjustments	(358)							(408)			50
Ending balances at Sep. 30, 2015	$ 298,660		$ 936	$ 71		$ 380,120		$ (991)	$ (81,654)	$ (96)	$ 274
Ending balances, shares at Sep. 30, 2015			93,707	70,504,396						29,990