Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 4,794	$ 9,521
Prepaid expenses and other current assets	178	399
Total current assets	4,972	9,920
Long-term restricted cash	10	10
Other long-term assets		13
Total assets	4,982	9,943
Current liabilities:
Accounts payable	69	809
Accrued expenses and other current liabilities	180	120
Total current liabilities	249	929
Warrant liability		67
Total liabilities	249	996
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred Stock, $0.0001 par value — 500,000 shares authorized; 6,746 shares designated Series A convertible preferred stock; no shares issued and outstanding at September 30, 2025, and December 31, 2024
Common stock, $0.0001 par value — 200,000,000 shares authorized; 3,652,285 shares issued and outstanding at September 30, 2025, and December 31, 2024
Additional paid-in capital	306,123	306,103
Accumulated deficit	(301,390)	(297,156)
Total stockholders’ equity	4,733	8,947
Total liabilities and stockholders’ equity	$ 4,982	$ 9,943