Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

The following tables set forth the fair value of the Company’s financial instruments as of September 30, 2018 and December 31, 2017 (in millions):

			Fair Value
September 30, 2018	Carrying Value		Significant Unobservable Inputs (Level 3)		Total Fair Value
Financial liabilities:
Senior convertible notes (2021 notes)	$	19.1	$	19.7	$	19.7
Facility financing obligation		14.2		11.4		11.4
Note payable to related party		72.1		80.7		80.7
Milestone rights		8.8		19.0		19.0
Total financial liabilities	$	114.2	$	130.8	$	130.8

			Fair Value
December 31, 2017	Carrying Value		Significant Unobservable Inputs (Level 3)		Total Fair Value
Financial liabilities:
Senior convertible notes (2021 notes)	$	24.4	$	19.8	$	19.8
Facility financing obligation		52.7		54.6		54.6
Milestone rights		8.8		19.1		19.1
Total financial liabilities	$	85.9	$	93.5	$	93.5