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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 STATEMENT OF COMPREHENSIVE INCOME
Revenue	$ 5,039		$ 8,145
Operating expenses:
Research and development	13,715	$ 11,424	24,454	$ 18,125
General and administrative	4,710	3,460	8,780	5,775
Total operating expenses	18,425	14,884	33,234	23,900
Loss from operations	(13,386)	(14,884)	(25,089)	(23,900)
Other income (expense), net	861	177	1,809	301
Net loss	$ (12,525)	$ (14,707)	$ (23,280)	$ (23,599)
Net loss per share, basic and diluted (in dollars per share)	$ (0.48)	$ (1.39)	$ (0.90)	$ (3.51)
Weighted average common shares outstanding, basic and diluted (in shares)	25,922,833	10,593,987	25,758,658	6,716,283
Comprehensive loss:
Net loss	$ (12,525)	$ (14,707)	$ (23,280)	$ (23,599)
Other comprehensive income:
Unrealized gain on marketable securities	42	2	66	2
Total other comprehensive income	42	2	66	2
Comprehensive loss	$ (12,483)	$ (14,705)	$ (23,214)	$ (23,597)

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