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GOODWILL - Disclosure of detailed information about recoverable amounts for cash-generating units with indefinite life intangible assets and goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of reconciliation of changes in goodwill [line items]      
Carrying value of goodwill $ 7,130 $ 7,130 $ 7,130
Loyalty Currency Retailing [Member]      
Disclosure of reconciliation of changes in goodwill [line items]      
Carrying value of goodwill 5,681    
Carrying value of indefinite-life intangible assets $ 4,505    
Recoverable amount method Value in Use    
Period used (years) 5    
Terminal growth rate 2.0%    
Pre-tax discount rate 19.40%    
Points Travel [Member]      
Disclosure of reconciliation of changes in goodwill [line items]      
Carrying value of goodwill $ 1,449    
Carrying value of indefinite-life intangible assets $ 0    
Recoverable amount method Value in Use    
Period used (years) 5    
Terminal growth rate 2.0%    
Pre-tax discount rate 26.00%