CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, net	$ 1,407	$ 1,263
Costs and expenses:
Cost of revenue		1,207
Cost of revenue	1,269
Research and development	9,444	19,643
General and administrative	6,200	7,464
Total costs and expenses	16,913	28,314
Loss from operations	(15,506)	(27,051)
Other income (expense), net	178	(230)
Loss from continuing operations	(15,328)	(27,281)
Loss from discontinued operations	(258)	(10,284)
Net loss	$ (15,586)	$ (37,565)
Net loss per share, basic and diluted	$ (0.37)	$ (0.91)
Weighted average common shares outstanding, basic and diluted (in shares)	41,618,429	41,248,663
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities, net of tax of $0	$ 60	$ 34
Foreign currency translation adjustments	53	(14)
Total other comprehensive income (loss)	113	20
Comprehensive loss	(15,473)	(37,545)
Contract research
Revenue, net	1,189	$ 1,263
Other revenue
Revenue, net	$ 218