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ACQUISITIONS - Revenues and direct operating costs associated with the acquired properties (Details) - USD ($)	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Revenues	$ 50,339,105	$ 51,334,225	$ 41,798,315	$ 32,687,179	$ 29,924,883	$ 29,891,391	$ 93,132,540	$ 59,816,274	$ 143,471,645	$ 92,503,453	$ 195,702,831	$ 120,065,361	$ 66,699,700
Oil and natural gas production costs	15,478,052	11,569,109	9,408,764				20,977,873		36,455,925		48,496,225	27,801,989	15,978,362
Oil and natural gas production taxes	$ 2,307,226	$ 2,412,895	$ 2,082,875				$ 4,495,770		$ 6,802,996		9,130,379	$ 5,631,093	$ 3,152,562
Acquired properties
Business Acquisition [Line Items]
Revenues											105,102,038
Oil and natural gas production costs											17,037,228
Oil and natural gas production taxes											4,646,660
Total direct costs											21,683,888
Earnings from the Acquired properties											$ 83,418,150

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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