CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
CONSOLIDATED BALANCE SHEETS
Current portion of deferred financing costs for the liability related to the sale of future royalties	$ 707	$ 753
Interest rate (as a percent)	4.50%	4.50%
Non-current deferred financing costs	$ 25	$ 36
Noncurrent portion of deferred financing costs for the liability related to the sale of future royalties	$ 977	$ 1,536
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	149,688,000	149,400,000
Common stock, outstanding shares	149,688,000	149,400,000