CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
Revenue		$ 5,000		$ 5,000
Operating expenses:
Research and development	$ 10,677	9,479	$ 21,679	18,029
General and administrative	3,421	2,548	6,609	5,766
Total operating expenses	14,098	12,027	28,288	23,795
Loss from operations	(14,098)	(7,027)	(28,288)	(18,795)
Other income:
Grant income	372	1,750	1,201	2,839
Interest income	417	16	908	28
Total other income	789	1,766	2,109	2,867
Loss before income taxes	(13,309)	(5,261)	(26,179)	(15,928)
Provision for income taxes	73	472	144	472
Net loss	$ (13,382)	$ (5,733)	$ (26,323)	$ (16,400)
Net Loss per Share
Net loss per share attributable to common stockholders—basic and diluted (in dollar per share)	$ (1.02)	$ (453.60)	$ (2.00)	$ (1,297.57)
Weighted average common stock outstanding—basic and diluted (in shares)	13,131,291	12,639	13,128,956	12,639
Other comprehensive loss
Net loss	$ (13,382)	$ (5,733)	$ (26,323)	$ (16,400)
Net unrealized loss on investments held	20		63
Foreign currency translation adjustments		44
Comprehensive loss	$ (13,362)	$ (5,689)	$ (26,260)	$ (16,400)