REVENUE - Summary of Company's major customers as a percentage of total revenue (Details) - Revenue Benchmark - Customer Concentration Risk	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Percentage of concentration risk	100.00%	100.00%
ARM Energy Management, LLC
Concentration Risk [Line Items]
Percentage of concentration risk	68.00%	0.00%
Texican Crude & Hydrocarbon, LLC
Concentration Risk [Line Items]
Percentage of concentration risk	19.00%	87.00%
Lucid Energy Delaware, LLC
Concentration Risk [Line Items]
Percentage of concentration risk	12.00%	10.00%
Other below 10%
Concentration Risk [Line Items]
Percentage of concentration risk	1.00%	3.00%

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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