Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 14,175	$ 21,465
Marketable securities		11,686
Prepaid expenses and other current assets	2,664	3,623
Total current assets	16,839	36,774
Operating lease right-of-use asset	73	247
Equipment, net	57	78
Other assets, noncurrent	163	1,128
Total assets	17,132	38,227
Current liabilities
Accounts payable	377	1,702
Accrued expenses and other current liabilities	820	4,128
Total current liabilities	1,197	5,830
Operating lease liabilities, noncurrent	61	66
Other liabilities, noncurrent	43
Total liabilities	1,301	5,896
Commitments and contingencies (Note 9)
Mezzanine equity, Preferred stock, par value of $0.00001 per share; 10,000,000 shares authorized at December 31, 2024 and 2023; 161 shares issued and outstanding as of December 31, 2024 and no shares issued or outstanding as of December 31, 2023	1,360
Stockholders’ equity
Common stock, par value of $0.00001 per share; 300,000,000 shares authorized at December 31, 2024 and 2023; 1,316,989 and 1,084,509 shares issued and outstanding at December 31, 2024 and 2023, respectively
Additional paid-in capital	291,898	288,036
Accumulated deficit	(277,524)	(256,085)
Accumulated other comprehensive income	97	380
Total stockholders’ equity	15,831	32,331
Total liabilities and stockholders’ equity	$ 17,132	$ 38,227