8. Oil and Gas Properties (Details-Gross and Net Wells)	Dec. 31, 2015 NetNumberOfWells / pure NumberOfWells / pure	Dec. 31, 2014 NetNumberOfWells / pure NumberOfWells / pure
Productive oil wells, gross	349	247
Productive oil wells, net	10.95	7.88
NORTH DAKOTA
Productive oil wells, gross	344	242
Productive oil wells, net	10.58	7.51
MT
Productive oil wells, gross	5	5
Productive oil wells, net	.37	.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