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Note 11 - Notes Receivable - Notes Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Allowance for losses $ (623) $ (623) $ (263)
Notes receivable, net 9,200 9,600  
Notes Receivable to Franchisees [Member]      
Note receivable 9,861 10,245  
Allowance for losses (623) (623)  
Notes receivable, net $ 9,238 $ 9,622