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Note 17 - Commitments and Contingencies (Details Textual)
$ in Millions
9 Months Ended
Sep. 30, 2023
USD ($)
Letters of Credit Outstanding, Amount $ 39.6
Performance and Surety Bonds 18.4
Series A Bond [Member]  
Special Assessment Bond 45.5
Investment With Funding Commitments [Member]  
Equity Method Investment, Commitment Amount 64.7
Payments to Acquire Equity Method Investments $ 48.4