Note 1 - Nature of Operations (Details Textual)	May 31, 2023	May 31, 2022
Number of Wholly Owned Subsidiaries	3
Number of Stores	74	74
Number of States in which Entity Operates	20
Franchised Units [Member]
Number of Stores	67	68
Licensed Units [Member]
Number of Stores	3	4
Units Under Development [Member]
Number of Stores	4