CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating expenses:
Research and development	$ 8,867	$ 4,686
General and administrative	3,448	3,055
Change in fair value of contingent consideration	(53,700)	(1,000)
Total operating expenses	(41,385)	6,741
Income (Loss) from Operations	41,385	(6,741)
Other income (expense):
Other income, net	179	261
Net Income (Loss) and Comprehensive Income (Loss)	41,564	(6,480)
Net income (loss) attributable to common stockholders - basic	34,407	(6,480)
Net Income (Loss) Available to Common Stockholders, Diluted	$ 34,408	$ (6,480)
Net income (loss) per common share - basic (in dollars per share)	$ 0.31	$ (0.08)
Weighted-average common shares outstanding - basic (in shares)	109,808	77,458
Net income (loss) per common share - diluted (in dollars per share)	$ 0.31	$ (0.08)
Weighted-average common shares outstanding - diluted (in shares)	109,823	77,458