CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]	Preferred Class A [Member] Series A Convertible Preferred Stock [Member]	Common Class A [Member] Common Stock [Member]	Common Class B [Member]	Common Class B [Member] Common Stock [Member]	Warrant [Member] Common Stock [Member]	2018 Warrants [Member]
BALANCE at Dec. 31, 2016	$ (106,532)	$ 1,910,244	$ (1,785,536)	$ (243,988)	$ 1,272	$ 0	$ 11,476		$ 0
BALANCE (in shares) at Dec. 31, 2016						1
BALANCE (in shares) at Dec. 31, 2016							143,449,913	0	0
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Stock-based compensation	796	796
Shares issuance, stock-based compensation (in shares)							430,346
Shares issuance, stock-based compensation	0	(34)					$ 34
Number of Warrants Exercised											301,308
Stock and Warrants Issued During Period, Value, Preferred Stock and Warrants										$ 24
Adjustments to Additional Paid in Capital, Warrant Issued	301	277
Preferred dividend paid-in-kind	(2,357)	(2,357)
Net loss	(11,274)		(11,065)		(209)
Gain / (loss) on derivative instruments (Note 11)	1,258			1,258
Currency translation adjustment	2,072			2,164	(92)
Currency translation adjustment	2,072
BALANCE at Mar. 31, 2017	$ (115,736)	$ 1,908,926	$ (1,796,601)	$ (240,566)	$ 971	$ 0	$ 11,534		$ 0
BALANCE (in shares) at Mar. 31, 2017						1
BALANCE (in shares) at Mar. 31, 2017							144,181,567	0	0