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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Concentration of Credit Risk) (Details) - Customer Concentration Risk [Member] - numberOfCustomers	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues [Member]
Concentration Risk [Line Items]
Number of Customers	1	0	0
Concentration Risk, Benchmark Description	10	10	10
Accounts Receivables [Member]
Concentration Risk [Line Items]
Number of Customers	1	0
Concentration Risk, Benchmark Description	10	10
Royal Dutch Shell [Member] | Revenues [Member]
Concentration Risk [Line Items]
Concentration risk percentage	(13.00%)
Royal Dutch Shell [Member] | Accounts Receivables [Member]
Concentration Risk [Line Items]
Concentration risk percentage	(16.00%)

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- Definition

Number of Customers to Account for More than 10%

+ References

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- Definition

Identifies or describes the benchmark that serves as the denominator in the calculation of the percentage of concentration risk.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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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.

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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://fasb.org/us-gaap/role/ref/legacyRef
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