Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenues	$ 3,600	$ 25,717	$ 5,133	$ 28,031
Operating expenses:
Research and development	5,860	3,983	18,105	13,446
Selling, general and administrative	5,800	2,884	13,209	8,325
Operating expenses, total	11,660	6,867	31,314	21,771
Income (loss) from operations	(8,060)	18,850	(26,181)	6,260
Other income (expense), net:
Interest expense, net	(419)	(467)	(1,083)	(1,482)
Change in fair value of PIPE Warrant liability	86	(1,954)	3,184	9,071
Other income (expense), net	(333)	(2,421)	2,101	7,589
Net income (loss)	$ (8,393)	$ 16,429	$ (24,080)	$ 13,849
Basic net income (loss) per share
Net income (loss) per share	$ (0.33)	$ 1.02	$ (1.22)	$ 0.92
Weighted average number of common shares outstanding	25,808,000	16,074,000	19,773,000	15,079,000
Diluted net income (loss) per share
Net income (loss) per share	$ (0.33)	$ 1.02	$ (1.22)	$ 0.92
Weighted average number of common shares and dilutive common share equivalents outstanding	25,808	16,083	19,773	15,129
Collaboration and Licensing Revenue
Revenues:
Revenues	$ 3,293	$ 25,494	$ 4,280	$ 27,441
Partnership Royalties
Revenues:
Revenues	$ 307	$ 223	$ 853	$ 590