Condensed Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Oil, NGL and natural gas sales	$ 15,827,137	$ 8,438,709	$ 42,686,935	$ 29,748,884
Lease bonuses and rentals	24,146	5,014,238	539,479	6,936,156
Gains (losses) on derivative contracts	1,714,832	81,164	796,166	449,997
Income from partnerships	164,330	115,581	470,286	355,898
	17,730,445	13,649,692	44,492,866	37,490,935
Costs and expenses:
Lease operating expenses	3,105,709	2,254,543	9,040,613	6,570,942
Production taxes	460,902	289,642	1,177,341	1,071,993
Exploration costs	25,648	29,141	60,827	384,199
Depreciation, depletion and amortization	5,192,544	4,597,363	17,090,187	13,680,737
Provision for impairment	7,400	205,915	225,841	786,724
Loss (gain) on asset sales, interest and other	29,789	93,350	(138,921)	45,846
General and administrative	1,585,285	1,498,439	5,127,025	4,802,119
	10,407,277	8,968,393	32,582,913	27,342,560
Income before provision for income taxes	7,323,168	4,681,299	11,909,953	10,148,375
Provision for income taxes	2,253,000	1,581,000	3,669,000	2,960,000
Net income	$ 5,070,168	$ 3,100,299	$ 8,240,953	$ 7,188,375
Basic and diluted earnings per common share (Note 3) (in Dollars per share)	$ 0.61	$ 0.37	$ 0.99	$ 0.86
Basic and diluted weighted average shares outstanding:
Common shares (in Shares)	8,163,520	8,249,954	8,247,642	8,253,079
Unissued, directors' deferred compensation shares (in Shares)	116,762	115,087	113,259	133,702
(in Shares)	8,280,282	8,365,041	8,360,901	8,386,781
Dividends declared per share of common stock and paid in period (in Dollars per share)	$ 0.07	$ 0.07	$ 0.21	$ 0.21