COMMODITY DERIVATIVE INSTRUMENTS - Fair Value of Derivative Instruments within Balance Sheet (Details) - USD ($)	Jun. 30, 2019	Jun. 30, 2018
Derivative [Line Items]
Derivative commodity asset (liability)	$ (108,557)	$ 695,941
Crude oil swaps
Derivative [Line Items]
Derivative commodity asset (liability)	48,620	48,724
Crude oil futures
Derivative [Line Items]
Derivative commodity asset (liability)	$ (157,177)	$ 647,217

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958

Name:	us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant