Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 5,825	$ 9,521
Prepaid expenses and other current assets	317	399
Total current assets	6,142	9,920
Long-term restricted cash	10	10
Other long-term assets		13
Total assets	6,152	9,943
Current liabilities:
Accounts payable	384	809
Accrued expenses and other current liabilities	164	120
Total current liabilities	548	929
Warrant liability		67
Total liabilities	548	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 June 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 June 30, 2025, and December 31, 2024
Additional paid-in capital	306,117	306,103
Accumulated deficit	(300,513)	(297,156)
Total stockholders’ equity	5,604	8,947
Total liabilities and stockholders’ equity	$ 6,152	$ 9,943