The capitalized costs incurred during the period (excluded from amortization) to obtain access to proved reserves and to provide facilities for extracting, treating, gathering and storing the oil and gas.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(c)(3)(ii)(A))
-URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(c)(7)(ii))
-URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-10(a)(7))
-URI http://asc.fasb.org/extlink&oid=82851474&loc=d3e511914-122862

Name:	us-gaap_DevelopmentCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

WRITE OFF OF DEFERRED DEVELOPMENT (Details) - USD ($)	1 Months Ended	3 Months Ended		12 Months Ended
WRITE OFF OF DEFERRED DEVELOPMENT (Details) - USD ($)	Apr. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017
WRITE OFF OF DEFERRED DEVELOPMENT
Capitalized deferred development				$ 5,430,000
Amount invested in a project			$ 6,308,000
Additional expenses incurred	$ 626,000
Write-off of deferred development		$ 6,840,000	$ 6,934,000
Net recovery associated with project		$ 94,000