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Note 3 - Related Party Transactions - Related Party Balances (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Due to franchisee $ 7,496,466 $ 3,228,777
Worlds Franchisees [Member]    
Due to franchisee 534,514 435,072
Risk management incentive program liability 703,379 499,199
Franchisee royalties $ 5,855,279 $ 4,897,445