v3.26.1
Note 5 - Pledged Assets - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Mortgage-backed securities $ 3,966,425 $ 4,097,311
Total 64,366,154 129,693,972
Asset Pledged as Collateral [Member]    
Accrued interest on pledged securities 71,000 413,000
Restricted cash 157,000 1,621,000
Total 16,100,000 90,842,000
Asset Pledged as Collateral [Member] | Collateralized Mortgage-Backed Securities [Member] | Pass Through Certificate [Member]    
Mortgage-backed securities 15,872,000 88,808,000
Securities Sold under Agreements to Repurchase [Member] | Asset Pledged as Collateral [Member]    
Accrued interest on pledged securities 71,000 413,000
Restricted cash 0 568,000
Total 15,943,000 89,789,000
Securities Sold under Agreements to Repurchase [Member] | Asset Pledged as Collateral [Member] | Collateralized Mortgage-Backed Securities [Member] | Pass Through Certificate [Member]    
Mortgage-backed securities 15,872,000 88,808,000
Derivative [Member] | Asset Pledged as Collateral [Member]    
Accrued interest on pledged securities 0 0
Restricted cash 157,000 1,053,000
Total 157,000 1,053,000
Derivative [Member] | Asset Pledged as Collateral [Member] | Collateralized Mortgage-Backed Securities [Member] | Pass Through Certificate [Member]    
Mortgage-backed securities $ 0 $ 0