Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets
Cash and cash equivalents	$ 10,211	$ 14,175
Prepaid expenses and other current assets	2,816	2,664
Total current assets	13,027	16,839
Operating lease right-of-use asset	75	73
Equipment, net	47	57
Other assets, noncurrent	542	163
Total assets	13,691	17,132
Current liabilities
Accounts payable	756	377
Accrued expenses and other current liabilities	1,873	820
Total current liabilities	2,629	1,197
Operating lease liabilities, noncurrent	60	61
Other liabilities, noncurrent	49	43
Total liabilities	2,738	1,301
Commitments and contingencies (Note 8)
Mezzanine equity, Preferred stock, par value of $0.00001 per share; 10,000,000 shares authorized at June 30, 2025 and December 31, 2024; 159 and 161 shares issued and outstanding as of June 30, 2025 and December 31, 2024, respectively	1,341	1,360
Stockholders’ equity
Common stock, par value of $0.00001 per share; 300,000,000 shares authorized at June 30, 2025 and December 31, 2024; 1,324,560 and 1,316,989 shares issued and outstanding at June 30, 2025 and December 31, 2024, respectively
Additional paid-in capital	292,297	291,898
Accumulated deficit	(283,494)	(277,524)
Accumulated other comprehensive income	809	97
Total stockholders’ equity	10,953	15,831
Total liabilities and stockholders' equity	$ 13,691	$ 17,132