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Note 4 - Leases (Details Textual) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Lessee, Operating Lease, Renewal Term 5 years  
Operating Lease, Right-of-Use Asset $ 4,617,000 $ 3,309,000
Operating Lease, Liability, Total $ 4,990,000 $ 3,710,000
Minimum [Member]    
Lessee, Operating Lease, Term of Contract 10 years  
Maximum [Member]    
Lessee, Operating Lease, Term of Contract 11 years