Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses:
Research and development (inclusive of $190, $3,480, $2,293 and $8,497 respectively, with a related party)	$ 12,929	$ 5,634	$ 30,453	$ 14,293
General and administrative (inclusive of $0, $176, $0 and $357 respectively, with a related party)	5,551	2,514	15,934	4,695
Total operating expenses	18,480	8,148	46,387	18,988
Loss from operations	(18,480)	(8,148)	(46,387)	(18,988)
Other income (expense):
Interest expense	0	0	(1)	0
Interest income	1,162	1	2,787	21
Change in fair value of derivative liabilities	0	(1,116)	0	(6,416)
Other (expense) income	(594)	(5)	(1,027)	0
Total other income (expense), net	568	(1,120)	1,759	(6,395)
Net loss attributable to common stockholders	$ (17,912)	$ (9,268)	$ (44,628)	$ (25,383)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.50)	$ (4.50)	$ (1.42)	$ (12.36)
Weighted average common shares outstanding, basic and diluted	35,927,485	2,065,676	31,860,716	2,054,115
Comprehensive loss:
Net loss	$ (17,912)	$ (9,268)	$ (44,628)	$ (25,383)
Other comprehensive income:
Change in unrealized (loss) gain on investments	(137)	0	875	0
Comprehensive loss	$ (18,049)	$ (9,268)	$ (43,753)	$ (25,383)