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Note 3 - Related Party Transactions - Related Party Balances (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Due to franchisees $ 11,334   $ 11,334   $ 9,846
Worlds Franchisees [Member]          
Franchisee royalties 2,448 $ 2,181 4,886 $ 4,265  
Due to franchisees 1,136   1,136   1,154
Risk management incentive program liability $ 538   $ 538   $ 234