Statements of operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 7,486	$ 8,823
General and administrative	4,775	1,525
Total operating expenses	12,261	10,348
Loss from operations	(12,261)	(10,348)
Change in fair value of warrant liability	(5,538)
Interest expense, net	(38)	(96)
Total other expenses	(5,576)	(96)
Net loss	$ (17,837)	$ (10,444)
Per share information:
Net loss per share of common stock, basic and diluted	$ (5.26)	$ (9.55)
Weighted-average common shares outstanding, basic and diluted	3,389,592	1,093,959