Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating expenses:
Research and development	$ 18,410	$ 17,794
General and administrative	9,829	10,022
Total operating expenses	28,239	27,816
Loss from operations	(28,239)	(27,816)
Other income (expense):
Interest and other income	605	864
Interest and other expense	(688)	(855)
Loss before income taxes	(28,322)	(27,807)
Income tax expense	(1)	(1)
Net loss	(28,323)	(27,808)
Other comprehensive loss:
Unrealized loss on short-term investments, net	(12)	0
Comprehensive loss	$ (28,335)	$ (27,808)
Net loss per share, basic (in dollars per share)	$ 1.86	$ 3.24
Net loss per share, diluted (in dollars per share)	$ 1.86	$ 3.24
Weighted average shares used to compute basic net loss per share (in shares)	15,259,958	8,569,854
Weighted average shares used to compute diluted net loss per share (in shares)	15,259,958	8,569,854