Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 26,790	$ 25,973
General and administrative	9,900	4,031
Total operating expenses	36,690	30,004
Loss from operations	(36,690)	(30,004)
Other income (expense):
Interest income	494	1,418
Interest expense	(1,012)	(347)
Change in fair value of warrant liability	(75)
Other expense	(21)
Total other income (expense)	(614)	1,071
Net loss	(37,304)	(28,933)
Other comprehensive loss:
Unrealized (loss) gain on available-for-sale securities, net	(40)	94
Comprehensive loss	$ (37,344)	$ (28,839)
Net loss per share, basic and diluted	$ (3.97)	$ (12.17)
Weighted average shares of common stock outstanding, basic and diluted	9,404,188	2,377,456