Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 3,173	$ 646	$ 5,890	$ 2,167
Costs and operating expenses:
Cost of products sold	5,141	2,267	10,998	6,878
Research and development	8,343	5,865	24,492	15,489
Selling, general and administrative	15,833	7,978	35,193	18,998
Change in fair value of contingent consideration	118	700	(1,466)	700
Total costs and operating expenses	29,435	31,810	69,217	57,065
Loss from operations	(26,262)	(31,164)	(63,327)	(54,898)
Other income (expense):
Change in fair value of warrant liability and embedded derivative	(3,683)	(3)	(5,555)	(608)
Loss on debt extinguishment		(49)		(1,447)
Interest income	23	525	393	733
Interest expense	(1,366)	(1,394)	(4,090)	(20,905)
Total other expense, net	(5,026)	(921)	(9,252)	(22,227)
Net loss	(31,288)	(32,085)	(72,579)	(77,125)
Other comprehensive income (loss)
Unrealized (loss) gain on marketable securities	(9)	40	(50)	47
Foreign currency translation adjustment	78	(45)	147	(57)
Comprehensive loss	$ (31,219)	$ (32,090)	$ (72,482)	$ (77,135)
Net loss per common share, basic and diluted	$ (1.95)	$ (47.21)	$ (12.36)	$ (115.66)
Weighted average shares outstanding, basic and diluted	16,080,467	679,591	5,870,861	666,823
License Acquired [Member]
Costs and operating expenses:
Research and development		$ 15,000		$ 15,000