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Note 9 - Property and Equipment - Estimated Useful Lives of Property, Plant and Equipment (Details) - Top of range [member]
12 Months Ended
Dec. 31, 2023
Office properties [member]  
Statement Line Items [Line Items]  
Useful life (Year) 7 years
Equipment 1 [member]  
Statement Line Items [Line Items]  
Useful life (Year) 10 years
Leasehold improvements [member]  
Statement Line Items [Line Items]  
Useful life (Year) 6 years
Furniture and fixtures 1 [member]  
Statement Line Items [Line Items]  
Useful life (Year) 5 years