Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating expenses:
Research and development	$ 6,551	$ 6,029	$ 12,562	$ 13,321
General and administrative	4,412	3,805	8,270	8,151
Restructuring charges	0	0	0	5,107
Total operating expenses	10,963	9,834	20,832	26,579
Loss from operations	(10,963)	(9,834)	(20,832)	(26,579)
Interest income (expense), net	513	(271)	628	(580)
Loss on extinguishment of debt	0	0	(942)	0
Total other income (expense), net	513	(271)	(314)	(580)
Loss before income taxes	(10,450)	(10,105)	(21,146)	(27,159)
Income tax expense	11	5	22	10
Net loss	$ (10,461)	$ (10,110)	$ (21,168)	$ (27,169)
Net Loss Per Share
Net loss per share, basic (in dollars per share)	$ (0.18)	$ (0.36)	$ (0.38)	$ (1.04)
Net loss per share, diluted (in dollars per share)	$ (0.19)	$ (0.37)	$ (0.42)	$ (1.06)
Weighted average common shares outstanding, basic (in shares)	59,018,340	28,405,046	55,415,111	26,025,025
Weighted average common shares outstanding, diluted (in shares)	54,578,340	27,575,596	50,975,111	25,608,008
Other comprehensive income (loss):
Unrealized (loss) gain on marketable securities	$ (26)	$ 49	$ (35)	$ 159
Total other comprehensive income (loss)	(26)	49	(35)	159
Total comprehensive loss	$ (10,487)	$ (10,061)	$ (21,203)	$ (27,010)