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Note 8 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Financing Receivable, after Allowance for Credit Loss $ 5.2 $ 3.5
Variable Interest Entity [Member]    
Financing Receivable, after Allowance for Credit Loss $ 4.4 $ 2.9