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6. Oil and Gas Properties (Tables) | 9 Months Ended
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Sep. 30, 2015
Extractive Industries [Abstract] |
Gross and net productive oil wells |
|  | September 30, 2015 |  |  | September 30, 2014 |
|  | Gross |  |  | Net |  |  | Gross |  |  | Net |
North Dakota |  |  | 336 |  |  |  | 10.51 |  |  |  | 230 |  |  |  | 7.28 |
Montana |  |  | 5 |  |  |  | 0.37 |  |  |  | 1 |  |  |  | 0.08 |
Total |  |  | 341 |  |  |  | 10.88 |  |  |  | 231 |  |  |  | 7.36 |
Capitalized costs |
|  | Nine Months Ended |
|  | September 30, |
|  | 2015 |  |  | 2014 |
Purchases of oil and gas properties and development costs for cash |  | $ | 17,968,423 |  |  | $ | 17,410,744 |
Purchase of oil and gas properties accrued at period-end |  |  | 7,359,282 |  |  |  | 11,775,176 |
Purchase of oil and gas properties accrued at beginning of period |  |  | (9,364,796 | ) |  |  | (7,953,801 | )
Advances to operators applied to purchase of oil and gas properties |  |  | – |  |  |  | 4,285,575 |
Capitalized asset retirement costs, net of revision in estimate |  |  | 42,391 |  |  |  | 61,815 |
Total purchase and development costs, oil and gas properties |  | $ | 16,005,300 |  |  | $ | 25,579,509 |

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51678428&loc=SL6806780-109447 + Details
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- Definition Tabular disclosure of productive wells, if oil and gas operations are material to the entity and its subsidiaries' business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1208 -Paragraph (a) + Details
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