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FINANCIAL INSTRUMENTS (Details 3) - customer	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Credit Risk
Number of major customers	3	3
Accounts receivable | Credit risk | Major customer one
Credit Risk
Concentration risk (as a percent)	35.00%	36.00%
Accounts receivable | Credit risk | Major customer two
Credit Risk
Concentration risk (as a percent)	30.00%	29.00%
Accounts receivable | Credit risk | Major customer three
Credit Risk
Concentration risk (as a percent)	27.00%	25.00%

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- Definition

Represents the number of major customers of the reporting entity.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
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