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Note 11 - Notes Receivable (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2022
Jun. 30, 2022
Sep. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Financing Receivable, after Allowance for Credit Loss     $ 4,668     $ 4,668   $ 3,500
Interest Income, Operating     83   $ 51 197 $ 157  
Financing Receivable, Allowance for Credit Loss     560     560   $ 405
Receivable in Connection With Sale of California Locations [Member]                
Financing Receivable, after Allowance for Credit Loss $ 71              
Notes From Non-franchisees [Member]                
Financing Receivable, after Allowance for Credit Loss     $ 0     0    
Interest Income, Operating       $ 0   $ 0 $ 41  
Financing Receivable, Allowance for Credit Loss, Writeoff $ 1,600              
The Notes From Non-Franchisees [Member]                
Financing Receivable, Additional Impairment   $ 233            
Minimum [Member]                
Notes Receivable, Interest Fixed Rate       6.00%        
Maximum [Member]                
Notes Receivable, Interest Fixed Rate       10.00%