Oil and Gas Reserve Data (Tables)

12 Months Ended

Mar. 31, 2013

Extractive Industries [Abstract]

Changes in Proved Reserves:

		Oil (Bbls)	Natural Gas (Mcf)
Proved Developed and Undeveloped Reserves:
As of April 1, 2010		240,000	8,405,000
	Revision of previous estimates	22,000	130,000
	Purchase of minerals in place	45,000	545,000
	Extensions and discoveries	-	136,000
	Sales of minerals in place	-	-
	Production	(17,000)	(459,000)
As of March 31, 2011		290,000	8,757,000
	Revision of previous estimates	33,000	(183,000)
	Purchase of minerals in place	19,000	-
	Extensions and discoveries	23,000	267,000
	Sales of minerals in place	-	-
	Production	(19,000)	(396,000)
As of March 31, 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

Summary of Proved Developed and Undeveloped Reserves

	Oil (Bbls)	Natural Gas (Mcf)
Proved Developed Reserves:
As of April 1, 2010	141,980	5,017,342
As of March 31, 2011	159,975	4,964,061
As of March 31, 2012	194,620	5,359,670
As of March 31, 2013	237,420	4,807,020
Proved Undeveloped Reserves:
As of April 1, 2010	98,088	3,388,248
As of March 31, 2011	130,187	3,792,974
As of March 31, 2012	151,730	3,085,060
As of March 31, 2013	128,290	3,037,180

Progress of Converting Proved Undeveloped Reserves:

	Oil & Natural Gas	Future
	(Mcfe)	Development Costs
PUDs, beginning of year	3,995,462	$       4,307,550
Revision of previous estimates	(412,155)	(185,185)
Conversions to PD reserves	(155,700)	(228,198)
Additional PUDs added	379,334	647,350
PUDs, end of year	3,806,941	$       4,541,517

Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves:

	March 31
	2013	2012	2011
Future cash inflows	$    52,900,000	$   64,783,000	$   56,413,000
Future production costs and taxes	(14,893,000)	(16,031,000)	(11,086,000)
Future development costs	(4,850,000)	(4,530,000)	(4,029,000)
Future income taxes	(6,374,000)	(9,920,000)	(9,118,000)
Future net cash flows	26,783,000	34,302,000	32,180,000
Annual 10% discount for estimated timing of cash flows	(12,414,000)	(14,946,000)	(14,528,000)
Standardized measure of discounted future net cash flows	$ 14,369,000	$ 19,356,000	$ 17,652,000

Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves:

	March 31
	2013	2012	2011
Sales of oil and gas produced, net of production costs	$ (1,982,000)	$ (2,298,000)	$ (2,119,000)
Net changes in price and production costs	(5,881,000)	(375,000)	1,590,000
Changes in previously estimated development costs	1,150,000	1,353,000	830,000
Revisions of quantity estimates	(811,000)	1,344,000	1,088,000
Net change due to purchases and sales of minerals in place	1,471,000	390,000	1,976,000
Extensions and discoveries, less related costs	321,000	1,449,000	165,000
Net change in income taxes	2,178,000	(596,000)	(1,076,000)
Accretion of discount	2,495,000	2,265,000	1,809,000
Changes in timing of estimated cash flows and other	(3,928,000)	(1,828,000)	(771,000)
Changes in standardized measure	(4,987,000)	1,704,000	3,492,000
Standardized measure, beginning of year	19,356,000	17,652,000	14,160,000
Standardized measure, end of year	$   14,369,000	$   19,356,000	$   17,652,000