Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 0	$ 0
Operating expenses:
Research and development	17,967	17,008
General and administrative	9,680	9,597
Total operating expenses	27,647	26,605
Loss from operations	(27,647)	(26,605)
Other income (expense), net	318	441
Net loss	$ (27,329)	$ (26,164)
Net loss per share - basic	$ (6.02)	$ (5.89)
Net loss per share - diluted	$ (6.02)	$ (5.89)
Weighted average common shares outstanding - basic	4,539,318	4,440,338
Weighted average common shares outstanding - diluted	4,539,318	4,440,338
Comprehensive loss:
Net loss	$ (27,329)	$ (26,164)
Other comprehensive gain (loss):
Unrealized (loss) on investments, net of tax of $0	(35)	(11)
Total other comprehensive (loss)	(35)	(11)
Total comprehensive loss	$ (27,364)	$ (26,175)