Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net loss	$ (19.2)	$ (12.9)
Unrealized gain (loss) on short-term available-for-sale marketable securities	0.0	0.0
Foreign currency translation loss	0.0	(0.2)
Comprehensive loss	$ (19.2)	$ (13.1)