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16. Oil and Gas Reserve Data (Tables) | 12 Months Ended
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Mar. 31, 2015
Extractive Industries [Abstract] |
Changes in Proved Reserves: | Changes in Proved Reserves:
| Oil (Bbls) |  | Natural Gas (Mcf)
Proved Developed and Undeveloped Reserves: |  |  |  |  |  |  |  |
As of April 1, 2012 |  |  | 346,000 |  |  |  | 8,445,000 |
Revision of previous estimates |  |  | (10,000 | ) |  |  | (589,000 | )
Purchase of minerals in place |  |  | 48,000 |  |  |  | 71,000 |
Extensions and discoveries |  |  | 5,000 |  |  |  | 318,000 |
Sales of minerals in place |  |  | — |  |  |  | — |
Production |  |  | (23,000 | ) |  |  | (401,000 | )
As of March 31, 2013 |  |  | 366,000 |  |  |  | 7,844,000 |
Revision of previous estimates |  |  | 12,000 |  |  |  | (1,404,000 | )
Purchase of minerals in place |  |  | 50,000 |  |  |  | 18,000 |
Extensions and discoveries |  |  | 101,000 |  |  |  | 163,000 |
Sales of minerals in place |  |  | — |  |  |  | — |
Production |  |  | (27,000 | ) |  |  | (362,000 | )
As of March 31, 2014 |  |  | 502,000 |  |  |  | 6,259,000 |
Revision of previous estimates |  |  | (90,000 | ) |  |  | (665,000 | )
Purchase of minerals in place |  |  | 43,000 |  |  |  | 795,000 |
Extensions and discoveries |  |  | 235,000 |  |  |  | 269,000 |
Sales of minerals in place |  |  | — |  |  |  | — |
Production |  |  | (30,000 | ) |  |  | (369,000 | )
As of March 31, 2015 |  |  | 660,000 |  |  |  | 6,289,000 |
Summary of Proved Developed and Undeveloped Reserves | Summary of Proved Developed and Undeveloped Reserves as of March 31, 2015, 2014 and 2013:
|  | Oil (Bbls) |  | Natural Gas (Mcf)
Proved Developed Reserves: |  |  |  |
As of April 1, 2012 |  |  | 194,620 |  |  |  | 5,359,670 |
As of March 31, 2013 |  |  | 237,420 |  |  |  | 4,807,020 |
As of March 31, 2014 |  |  | 294,620 |  |  |  | 4,081,470 |
As of March 31, 2015 |  |  | 283,670 |  |  |  | 4,584,790 |
Proved Undeveloped Reserves: |  |  |  |  |  |  |  |
As of April 1, 2012 |  |  | 151,730 |  |  |  | 3,085,060 |
As of March 31, 2013 |  |  | 128,290 |  |  |  | 3,037,180 |
As of March 31, 2014 |  |  | 206,930 |  |  |  | 2,177,810 |
As of March 31, 2015 |  |  | 376,070 |  |  |  | 1,703,790 |
Progress of Converting Proved Undeveloped Reserves: |
|  |  | Oil & Natural Gas (Mcfe) |  |  |  | Future Develepment Costs |
PUDs, beginning of year |  |  | 3,419,362 |  |  | $ | 4,620,320 |
Revision of previous estimates |  |  | (943,113 | ) |  |  | (441,475 | )
Conversions to PD reserves |  |  | (214,890 | ) |  |  | (643,429 | )
Additional PUDs added |  |  | 1,698,873 |  |  |  | 3,081,986 |
PUDs, end of year |  |  | 3,960,232 |  |  | $ | 6,617,402 |
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves: | Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves:
|  | March 31
|  | 2015 |  | 2014 |  | 2013
Future cash inflows |  | $ | 72,238,000 |  |  | $ | 70,252,000 |  |  | $ | 52,900,000 |
Future production costs and taxes |  |  | (19,569,000 | ) |  |  | (20,647,000 | ) |  |  | (14,893,000 | )
Future development costs |  |  | (6,617,000 | ) |  |  | (4,826,000 | ) |  |  | (4,850,000 | )
Future income taxes |  |  | (9,254,000 | ) |  |  | (9,801,000 | ) |  |  | (6,374,000 | )
Future net cash flows |  |  | 36,798,000 |  |  |  | 34,978,000 |  |  |  | 26,783,000 |
Annual 10% discount for estimated timing of cash flows |  |  | (17,860,000 | ) |  |  | (15,649,000 | ) |  |  | (12,414,000 | )
Standardized measure of discounted future net cash flows |  | $ | 18,938,000 |  |  | $ | 19,329,000 |  |  | $ | 14,369,000 |
Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves: | Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves:
|  | March 31
|  | 2015 |  | 2014 |  | 2013
Sales of oil and gas produced, net of production costs |  | $ | (2,036,000 | ) |  | $ | (2,762,000 | ) |  | $ | (1,982,000 | )
Net changes in price and production costs |  |  | (4,066,000 | ) |  |  | 2,464,000 |  |  |  | (5,881,000 | )
Changes in previously estimated development costs |  |  | 2,627,000 |  |  |  | 270,000 |  |  |  | 1,150,000 |
Revisions of quantity estimates |  |  | (3,718,000 | ) |  |  | (657,000 | ) |  |  | (811,000 | )
Net change due to purchases and sales of minerals in place |  |  | 2,777,000 |  |  |  | 1,332,000 |  |  |  | 1,471,000 |
Extensions and discoveries, less related costs |  |  | 4,607,000 |  |  |  | 3,802,000 |  |  |  | 321,000 |
Net change in income taxes |  |  | 654,000 |  |  |  | (1,997,000 | ) |  |  | 2,178,000 |
Accretion of discount |  |  | 2,474,000 |  |  |  | 1,779,000 |  |  |  | 2,495,000 |
Changes in timing of estimated cash flows and other |  |  | (3,710,000 | ) |  |  | 729,000 |  |  |  | (3,928,000 | )
Changes in standardized measure |  |  | (391,000 | ) |  |  | 4,960,000 |  |  |  | (4,987,000 | )
Standardized measure, beginning of year |  |  | 19,329,000 |  |  |  | 14,369,000 |  |  |  | 19,356,000 |
Standardized measure, end of year |  | $ | 18,938,000 |  |  | $ | 19,329,000 |  |  | $ | 14,369,000 |

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