Quarterly report [Sections 13 or 15(d)]

Note 5 - Debt - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details)

v3.25.3
Note 5 - Debt - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jul. 10, 2025
May 12, 2025
Mar. 28, 2025
Mar. 26, 2025
Feb. 10, 2025
Nov. 19, 2024
Nov. 08, 2024
Sep. 30, 2025
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Interest paid during the three months ended September 30, 2025                 $ 1,274,000 $ 93,000  
Change in fair value of debt                 924,000 $ 0  
Purchase Agreement [Member]                      
Gross Proceeds $ 4,494,000                    
Proceeds net of original issue discount 4,000,000                    
Fair Value at issuance date 2,065,000             $ 2,041,000 2,041,000   $ 0
Note balance – December 31, 2024               4,494,000 4,494,000   0
Interest paid during the three months ended September 30, 2025               0 0    
Change in fair value of debt [1]               24,000 24,000    
Debt issue costs [2] $ 415,000                    
Debt Instrument, Interest Rate, Stated Percentage 8.00%                    
Purchase Agreement [Member] | YP Warrants [Member]                      
Fair Value allocated to YP Warrant liability $ 1,935,000                    
Agile Loan Agreement [Member]                      
Gross Proceeds             $ 1,850,000        
Proceeds net of original issue discount             0        
Fair Value at issuance date             2,132,000 0 0   1,679,000
Difference between proceeds and fair value at issuance [1]             282,000        
Note balance – December 31, 2024               0 0   1,454,000
Interest paid during the three months ended September 30, 2025               0 563,000    
Change in fair value of debt [1]               0 (178,000)    
Debt issue costs [2]             $ 180,000        
Debt Instrument, Interest Rate, Stated Percentage             42.00%        
Debt Instrument, Discount Rate             42.00%        
Agile II Note [Member]                      
Gross Proceeds         $ 2,500,000            
Proceeds net of original issue discount         0            
Fair Value at issuance date         3,205,000     0 0   0
Difference between proceeds and fair value at issuance [1]         705,000            
Note balance – December 31, 2024               0 0   0
Interest paid during the three months ended September 30, 2025               426,000 656,000    
Change in fair value of debt [1]               0 67,000    
Debt issue costs [2]         $ 125,000            
Debt Instrument, Interest Rate, Stated Percentage         42.00%            
Debt Instrument, Discount Rate         42.00%            
Belleau Purchase Agreement [Member]                      
Gross Proceeds     $ 1,250,000                
Proceeds net of original issue discount     0                
Fair Value at issuance date     1,019,000         1,074,000 1,074,000   0
Difference between proceeds and fair value at issuance [1]     (231,000)                
Note balance – December 31, 2024               1,000,000 1,000,000   0
Interest paid during the three months ended September 30, 2025               0 0    
Change in fair value of debt [1]               312,000 305,000    
Debt issue costs [2]     $ 0                
Debt Instrument, Interest Rate, Stated Percentage     20.00%                
Debt Instrument, Discount Rate     42.00%                
Diagonal Note [Member]                      
Gross Proceeds       $ 300,000              
Proceeds net of original issue discount       286,000              
Fair Value at issuance date       247,000       64,000 64,000   0
Difference between proceeds and fair value at issuance [1]       (39,000)              
Note balance – December 31, 2024               53,000 53,000   0
Interest paid during the three months ended September 30, 2025               0 0    
Change in fair value of debt [1]               40,000 64,000    
Debt issue costs [2]       $ 7,000              
Debt Instrument, Interest Rate, Stated Percentage       10.00%              
Debt Instrument, Discount Rate       42.00%              
Diagonal II Note [Member]                      
Gross Proceeds   $ 145,000                  
Proceeds net of original issue discount   132,000                  
Fair Value at issuance date   123,000           125,000 125,000   0
Difference between proceeds and fair value at issuance [1]   (9,000)                  
Note balance – December 31, 2024               145,000 145,000   0
Interest paid during the three months ended September 30, 2025               0 0    
Change in fair value of debt [1]               11,000 3,000    
Debt issue costs [2]   $ 7,000                  
Debt Instrument, Interest Rate, Stated Percentage   10.00%                  
Debt Instrument, Discount Rate   42.00%                  
RP Note [Member]                      
Gross Proceeds           $ 1,500,000          
Proceeds net of original issue discount           0          
Fair Value at issuance date           1,343,000   0 0   1,438,000
Difference between proceeds and fair value at issuance [1]           (157,000)          
Note balance – December 31, 2024               0 0   $ 1,500,000
Interest paid during the three months ended September 30, 2025               0 0    
Change in fair value of debt [1]               $ 0 $ 35,000    
Debt issue costs [2]           $ 0          
Debt Instrument, Interest Rate, Stated Percentage           40.00%          
Debt Instrument, Discount Rate           42.00%          
[1] Reflected in interest expense in the condensed statements of operations.
[2] Debt issue costs incurred in connection with the YP Note included legal fees and advisor fees. Debt issue costs incurred in connection with the Agile Loan included administrative fee of $92,500 to the collateral agent and advisor fees. Debt issuance costs are reflected in “other expense” in the condensed statements of operations.