ACCOUNTING POLICIES - Customer Promotion Costs (Details)	12 Months Ended
Dec. 31, 2017
Minimum
Property and Equipment
Expected useful life of product	3 years
Maximum
Property and Equipment
Expected useful life of product	5 years

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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