CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 134,272	$ 59,536	$ (18,760)
Other comprehensive income (loss):
Unrealized (loss) gain on marketable securities, net	(19)	3	1,305
Less: realized gain on marketable securities, net	0	0	(1,220)
Comprehensive income (loss)	134,253	59,539	(18,675)
Comprehensive income attributable to noncontrolling interest	129	0	0
Comprehensive income (loss) attributable to Innoviva stockholders	$ 134,124	$ 59,539	$ (18,675)