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Note 1 - Nature of Operations (Details Textual)
Aug. 31, 2020
May 31, 2020
Number of Wholly Owned Subsidiaries   3
Number of Stores 82  
Number of States in which Entity Operates 22  
Franchised Units [Member]    
Number of Stores 72  
Licensed Units [Member]    
Number of Stores 7  
Units Under Development [Member]    
Number of Stores 3