8. Oil and Gas Properties (Details-Gross and Net Wells)	Jun. 30, 2016 NumberOfWells / pure NetNumberOfWells / pure
Productive oil wells, gross	357
Productive oil wells, net	11.01
NORTH DAKOTA
Productive oil wells, gross	352
Productive oil wells, net	10.64
MT
Productive oil wells, gross	5
Productive oil wells, net	0.37

The total number of producing oil wells and oil wells capable of production, in which the entity owns an undivided working interest.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1208
-Paragraph (a)

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant