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SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING STANDARDS (Tables)
9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]  
Disaggregation of Revenue [Table Text Block]
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
 
2019
 
2018
 
2019
Cost per Served Sale
$
25,320

 
$
40,000

 
$
67,775

 
$
94,558

Cost per Redemption
8,236

 
15,611

 
29,447

 
43,851

Other
1,026

 
808

 
5,643

 
2,728

Revenue
$
34,582

 
$
56,419

 
$
102,865

 
$
141,137