CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Operating expenses:
Research and development	$ 2,533	$ 4,584	$ 6,258	$ 9,501
General and administrative	2,673	3,203	6,222	7,016
Total operating expenses	5,206	7,787	12,480	16,517
Loss from operations	(5,206)	(7,787)	(12,480)	(16,517)
Other income (expense):
Interest income	321	669	726	1,437
Interest expense	(10)	(24)	(23)	(52)
Loss on asset disposal	(40)	0	(20)	0
Other expense, net	(1)	0	(3)	(2)
Net loss	$ (4,936)	$ (7,142)	$ (11,800)	$ (15,134)
Net loss per common share, basic	$ (3.91)	$ (5.69)	$ (9.36)	$ (12.07)
Net loss per common share, diluted	$ (3.91)	$ (5.69)	$ (9.36)	$ (12.07)
Weighted-average number of shares used in computing net loss per common share, basic	1,260,867	1,255,145	1,260,202	1,253,760
Weighted-average number of shares used in computing net loss per common share, diluted	1,260,867	1,255,145	1,260,202	1,253,760
Comprehensive loss:
Net loss	$ (4,936)	$ (7,142)	$ (11,800)	$ (15,134)
Other comprehensive items:
Unrealized (loss) gain on marketable securities	(5)	44	2	116
Total other comprehensive (loss) income	(5)	44	2	116
Total comprehensive loss	$ (4,941)	$ (7,098)	$ (11,798)	$ (15,018)