Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ 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	$ 5,335	$ 6,937	$ 10,582	$ 15,023
General and administrative	3,714	3,338	7,597	8,637
Restructuring	0	0	0	1,207
Total operating expenses	9,049	10,275	18,179	24,867
Loss from operations	(9,049)	(10,275)	(18,179)	(24,867)
Interest income	490	623	875	1,170
Other income, net	3,695	265	3,610	13
Loss on issuance of common stock, pre-funded warrants and warrants	(20,397)	0	(20,397)	0
Net loss	(25,261)	(9,387)	(34,091)	(23,684)
Unrealized gain on marketable securities, net of tax	0	55	0	246
Comprehensive loss	$ (25,261)	$ (9,332)	$ (34,091)	$ (23,438)
Net loss per share attributable to common stockholders, basic	$ (7.99)	$ (4.68)	$ (13)	$ (11.84)
Net loss per share attributable to common stockholders, diluted	$ (7.99)	$ (4.68)	$ (13)	$ (11.84)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic	3,162	2,004	2,622	2,001
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted	3,162	2,004	2,622	2,001