CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue, net	$ 983	$ 1,118	$ 3,132	$ 4,379
Cost of revenue		1,067		3,063
Costs and expenses:
Cost of revenue	826		3,028
Research and development	16,183	15,189	53,334	41,482
Sales and marketing	112	63	629	89
General and administrative	6,726	6,141	21,142	20,481
Goodwill impairment			18,504
Total costs and expenses	23,847	22,460	96,637	65,115
Loss from operations	(22,864)	(21,342)	(93,505)	(60,736)
Other income (expense), net	(274)	710	(589)	2,189
Loss from continuing operations	(23,138)	(20,632)	(94,094)	(58,547)
Loss from discontinued operations	(32,181)	(12,108)	(48,666)	(35,640)
Net loss	$ (55,319)	$ (32,740)	$ (142,760)	$ (94,187)
Net loss per share, basic and diluted	$ (1.34)	$ (1.06)	$ (3.46)	$ (3.04)
Weighted average common shares outstanding, basic and diluted (in shares)	41,364,387	30,982,192	41,296,377	30,938,026
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities, net of tax of $0	$ (23)	$ 65	$ 41	$ 111
Foreign currency translation adjustments	14	7	27	19
Total other comprehensive income (loss)	(9)	72	68	130
Comprehensive loss	(55,328)	(32,668)	(142,692)	(94,057)
Contract research
Revenue, net	$ 983	$ 1,118	$ 3,132	3,379
Other revenue
Revenue, net				$ 1,000