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Note 10 - Derivative Financial Instruments - Balance Sheet Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Derivative financial instruments, fair value, net $ 3,492 $ 851
TBA and Other Forward MBS [Member] | Long [Member] | Investments -Trading [Member]    
Derivative financial instruments, fair value, net 4,669 1,275
TBA and Other Forward MBS [Member] | Short [Member] | Trading Securities Sold, Not Yet Purchased [Member]    
Derivative financial instruments, fair value, net $ (1,177) $ (424)