FAIR VALUE MEASUREMENTS - Fair Value Reconciliation of Level 3 Liabilities (Details) - Asset Retirement Obligation - USD ($)	3 Months Ended
Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015
Fair value reconciliation of level 3 liabilities measured at fair value
Balance at the beginning of the period	$ 534,666	$ 528,250	$ 509,325	$ 503,279
Accretion expense	6,495	6,416	6,186	6,046
Balance at the end of the period	$ 541,161	$ 534,666	$ 515,511	$ 509,325

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant