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REVENUE (Tables)
9 Months Ended
Sep. 30, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue [Table Text Block]
 Three Months Ended
September 30,
Nine Months Ended
September 30,
 2019202020192020
Cost per Served Sale$40,000 $33,618 $94,558 $84,817 
Cost per Redemption15,611 12,004 43,851 33,411 
Other808 457 2,728 1,582 
Revenue$56,419 $46,079 $141,137 $119,810