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Note 11 - Notes Receivable (Details Textual) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Aug. 31, 2022
Jun. 30, 2022
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Financing Receivable, after Allowance for Credit Loss     $ 5,200   $ 2,400
Interest Income, Operating     46 $ 93  
Financing Receivable, Allowance for Credit Loss     260   260
Notes From Non-franchisees [member]          
Financing Receivable, after Allowance for Credit Loss     0   $ 0
Interest Income, Operating     $ 0 $ 41  
Financing Receivable, Additional Impairment   $ 233      
Financing Receivable, Allowance for Credit Loss, Writeoff $ 1,600        
Receivable in Connection With Sale of California Locations [Member]          
Financing Receivable, after Allowance for Credit Loss $ 71        
Minimum [Member]          
Notes Receivable, Interest Fixed Rate     6.00%    
Maximum [Member]          
Notes Receivable, Interest Fixed Rate     10.00%