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SIGNIFICANT ACCOUNTING POLICIES AND RECENT ACCOUNTING STANDARDS (Tables) | 9 Months Ended
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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 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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