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Note 3 - Related Party Transactions - Related Party Balances (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Due to franchisee $ 9,846 $ 7,496
Worlds Franchisees [Member]    
Due to franchisee 1,154 535
Risk management incentive program liability 234 703
Franchisee royalties $ 8,676 $ 5,855