Condensed Consolidated Statements of Operations and Comprehensive (Loss)/Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Condensed Consolidated Statements of Operations and Comprehensive (Loss)/Income (Unaudited) [Abstract]
Revenues	$ 13,267	$ 27,146	$ 50,606	$ 54,723
Cost and expenses:
Manufacture and supply	5,592	4,880	16,201	14,205
Research and development	4,534	5,684	17,429	15,862
Selling, general and administrative	12,345	6,161	53,561	17,513
Total costs and expenses	22,471	16,725	87,191	47,580
(Loss)/income from operations	(9,204)	10,421	(36,585)	7,143
Other income (expenses):
Interest expense	(1,933)	(1,970)	(5,809)	(5,737)
Interest income	216	0	238	0
Change in fair value of warrant	(4,116)	0	(5,278)	(309)
Other, net	(1)	0	2	0
Net (loss)/income before income taxes	(15,038)	8,451	(47,432)	1,097
Income taxes	0	0	0	0
Net (loss)/income	(15,038)	8,451	(47,432)	1,097
Dividends on redeemable preferred interests	0	(626)	0	(1,854)
Net (loss)/income attributable to common shares/members' interests	(15,038)	7,825	(47,432)	(757)
Comprehensive net (loss)/income	$ (15,038)	$ 7,825	$ (47,432)	$ (757)
Net loss per share:
Net loss per common share - basic and diluted (in dollars per share)	$ (0.64)		$ (2.45)
Weighted-average number of common shares outstanding - basic and diluted (in shares)	23,646,192		19,335,541