CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CONSOLIDATED BALANCE SHEETS (UNAUDITED)
Current portion of deferred financing costs	$ 470	$ 635
Interest rate (as a percent)	4.50%	4.50%
Non-current deferred financing costs	$ 15	$ 22
Sale of future royalties, current portion and deferred financing costs	$ 699	$ 859
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	300,000,000	300,000,000
Common stock, issued shares	174,540,000	150,136,000
Common stock, outstanding shares	174,540,000	150,136,000