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Summary of Significant Accounting Policies - Services Provided to Marketing Funds by REMAX Franchising (Details) - Marketing funds - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Costs charged $ 6,396 $ 4,898
Technology - operating    
Costs charged 4,224 3,600
Technology - capital    
Costs charged 631 180
Marketing staff and administrative services    
Costs charged $ 1,541 $ 1,118