Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 0	$ 0	$ 0	$ 0
Operating expenses:
Research and development	44,688	15,594	78,088	27,967
General and administrative	5,639	7,110	10,244	12,856
Total operating expenses	50,327	22,704	88,332	40,823
Loss from operations	(50,327)	(22,704)	(88,332)	(40,823)
Interest income	1,204	3,005	3,074	6,044
Other income	100	0	100	0
Net loss	$ (49,023)	$ (19,699)	$ (85,158)	$ (34,779)
Net loss per common share:
Basic and diluted net loss per common share (in dollars per share)	$ (3.18)	$ (1.28)	$ (5.52)	$ (2.26)
Basic and diluted weighted average number of common shares outstanding	15,433,348	15,368,986	15,431,251	15,366,738