VARIABLE INTEREST ENTITIES (Details)	9 Months Ended
Sep. 30, 2018
Schedule of Equity Method Investments [Line Items]
Variable interest entity, ownership percentage	49.00%
Kuukpik
Schedule of Equity Method Investments [Line Items]
Gross revenue percentage received by joint venture	10.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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