Annual report [Section 13 and 15(d), not S-K Item 405]

Note 7 - Stockholders' Equity and Equity-linked Instruments - Share-based Payment Arrangement, Warrants, Activity (Details)

v3.26.1
Note 7 - Stockholders' Equity and Equity-linked Instruments - Share-based Payment Arrangement, Warrants, Activity (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Ending balance $ 8,000 $ 935,000
Series AAA-3 and AAA-4 Junior Preferred Stock Warrants [Member]    
Beginning balance 348,000 0
Initial fair value of warrant liability – grant date [1] 0 346,000
Change in fair value (346,000) 2,000
Ending balance 2,000 348,000
Warrants Issued With Placement Agent Agreement [Member]    
Beginning balance 587,000 1,571,000
Initial fair value of warrant liability – grant date [1],[2] 0 133,000
Change in fair value $ (581,000) (1,117,000)
Ending balance   $ 587,000
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Change in fair value of warrant liability Change in fair value of warrant liability
Ending balance $ 6,000 $ 587,000
[1] Estimated fair value on the respective dates of issuance.
[2] Refer to Note 6 for information regarding the Original YP Warrant issued in connection with the YP Note.