CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss) before noncontrolling interest	$ (33,096)	$ 4,360	$ (94,747)	$ (52,315)
Other comprehensive income (loss):
Foreign currency translation adjustments	(33)	1,214	1,462	1,261
Unrealized foreign exchange gain (loss) on intercompany balance	42		(1,832)
Net unrealized income (loss) on securities available-for-sale:	(8)	10	(16)	(48)
Other comprehensive income (loss)	1	1,224	(386)	1,213
Comprehensive income (loss)	(33,095)	5,584	(95,133)	(51,102)
Comprehensive loss attributable to noncontrolling interest	504	243	962	517
Comprehensive loss attributable to CTI	$ (32,591)	$ 5,827	$ (94,171)	$ (50,585)