CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss before noncontrolling interest	$ (29,361)	$ (33,096)	$ (46,392)	$ (94,747)
Other comprehensive income (loss):
Foreign currency translation adjustments	(426)	(33)	(976)	1,462
Unrealized foreign exchange gain (loss) on intercompany balance	484	42	1,024	(1,832)
Other-than-temporary impairment on available-for-sale securities	0	0	519	0
Net unrealized gain (loss) on available-for-sale securities	1	(8)	(7)	(16)
Other comprehensive income (loss)	59	1	560	(386)
Comprehensive loss	(29,302)	(33,095)	(45,832)	(95,133)
Comprehensive loss attributable to noncontrolling interest	178	504	755	962
Comprehensive loss attributable to CTI	$ (29,124)	$ (32,591)	$ (45,077)	$ (94,171)