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Revenue Recognition - Deferred revenue (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Less: current portion $ (28,829)   $ (22,807)
Deferred revenue, net of current portion, gift card and loyalty programs 5,118   5,030
Revenue recognized that was included in unearned revenue at the beginning of the year 3,600 $ 3,500  
Outstanding performance obligations      
Disaggregation of Revenue [Line Items]      
Contract with customer, liability 3,027   2,512
Franchising      
Disaggregation of Revenue [Line Items]      
Contract with customer, liability 2,390   2,560
Revenue recognized that was included in unearned revenue at the beginning of the year 400 $ 500  
Customer advances and sales to distributors and franchise fee      
Disaggregation of Revenue [Line Items]      
Contract with customer, liability 5,417   5,072
Less: current portion (3,458)   (2,964)
Deferred revenue, net of current portion, gift card and loyalty programs $ 1,959   $ 2,108