Note 11 - Derivatives (Detail) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Derivative Assets (Liabilities), at Fair Value, Net (in Dollars)	$ (1,259,714)	$ (172,271)
$3.75 floor / $4.25 ceiling [Member] | Mmbtu 80000 [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	3.75
$3.75 floor / $4.25 ceiling [Member] | Mmbtu 80000 [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	4.25
$3.75 floor / $4.25 ceiling [Member] | Mmbtu 80000 [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	80,000
Derivative Contract Volume (in Barrels of Oil Equivalent)	80,000
$3.75 floor / $4.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	3.75
$3.75 floor / $4.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	4.30
$3.75 floor / $4.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)	50,000
$3.75 floor / $4.05 ceiling [Member] | 100,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	3.75
$3.75 floor / $4.05 ceiling [Member] | 100,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	4.05
$3.75 floor / $4.05 ceiling [Member] | 100,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | February 2013 - December 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	100,000
Derivative Contract Volume (in Barrels of Oil Equivalent)	100,000
$4.00 floor / $4.55 ceiling [Member] | 160,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2013 - April 2014 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	4.00
$4.00 floor / $4.55 ceiling [Member] | 160,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2013 - April 2014 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price	4.55
$4.00 floor / $4.55 ceiling [Member] | 160,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2013 - April 2014 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	160,000
Derivative Contract Volume (in Barrels of Oil Equivalent)	160,000
$90 floor / $102 ceiling [Member] | Oil costless collars [Member] | March-December 2013 [Member] | Minimum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price	90.00
$90 floor / $102 ceiling [Member] | Oil costless collars [Member] | March-December 2013 [Member] | Maximum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price	102.00
$90 floor / $102 ceiling [Member] | Oil costless collars [Member] | March-December 2013 [Member] | NYMEX WTI [Member]
Derivative Contract Volume (in British Thermal Units)	3,000
Derivative Contract Volume (in Barrels of Oil Equivalent)	3,000
$90 floor / $101.50 ceiling [Member] | Oil costless collars [Member] | March-December 2013 [Member] | Minimum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price	90.00
$90 floor / $101.50 ceiling [Member] | Oil costless collars [Member] | March-December 2013 [Member] | Maximum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price	101.50
$90 floor / $101.50 ceiling [Member] | Oil costless collars [Member] | March-December 2013 [Member] | NYMEX WTI [Member]
Derivative Contract Volume (in British Thermal Units)	4,000
Derivative Contract Volume (in Barrels of Oil Equivalent)	4,000
$2.50 floor / $3.25 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | March - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor / $3.25 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | March - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.25
$2.50 floor/ $3.10 ceiling [Member] | 120,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor/ $3.10 ceiling [Member] | 120,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.10
$2.50 floor/ $3.10 ceiling [Member] | 120,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		120,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		120,000
$2.50 floor / $3.20 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor / $3.20 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.20
$2.50 floor / $3.20 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
$2.50 floor / $3.20 ceiling [Member] | 60,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor / $3.20 ceiling [Member] | 60,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.20
$2.50 floor / $3.20 ceiling [Member] | 60,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		60,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		60,000
$2.50 floor / $3.45 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor / $3.45 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.45
$2.50 floor / $3.45 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
$2.50 floor / $3.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor / $3.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.30
$2.50 floor / $3.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | April - October 2012 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
$2.50 floor / $3.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | August - October 2012 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		2.50
$2.50 floor / $3.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | August - October 2012 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.30
$2.50 floor / $3.30 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | August - October 2012 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
$3.00 floor / $3.70 ceiling [Member] | 150,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Contract 1 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.00
$3.00 floor / $3.70 ceiling [Member] | 150,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Contract 1 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.70
$3.00 floor / $3.70 ceiling [Member] | 150,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Contract 1 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		150,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		150,000
$3.00 floor / $3.70 ceiling [Member] | 150,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Contract 2 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.00
$3.00 floor / $3.70 ceiling [Member] | 150,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Contract 2 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.70
$3.00 floor / $3.70 ceiling [Member] | 150,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Contract 2 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		150,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		150,000
$3.00 floor / $3.65 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Minimum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.00
$3.00 floor / $3.65 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | Maximum [Member] | NYMEX Henry Hub [Member]
Derivative, Swap Type, Fixed Price		3.65
$3.00 floor / $3.65 ceiling [Member] | 50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | November 2012 - January 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
$90 floor / $105 ceiling [Member] | Oil costless collars [Member] | January - December 2012 [Member] | Minimum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price		90
$90 floor / $105 ceiling [Member] | Oil costless collars [Member] | January - December 2012 [Member] | Maximum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price		105
$90 floor / $110 ceiling [Member] | Oil costless collars [Member] | February - December 2012 [Member] | Minimum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price		90
$90 floor / $110 ceiling [Member] | Oil costless collars [Member] | February - December 2012 [Member] | Maximum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price		110
$90 floor / $114 ceiling [Member] | Oil costless collars [Member] | May - December 2012 [Member] | Minimum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price		90
$90 floor / $114 ceiling [Member] | Oil costless collars [Member] | May - December 2012 [Member] | Maximum [Member] | NYMEX WTI [Member]
Derivative, Swap Type, Fixed Price		114
50,000 Mmbtu [Member] | Natural Gas Costless Collars [Member] | March - October 2012 [Member] | $2.50 floor / $3.25 ceiling [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
50,000 Mmbtu [Member] | Natural Gas Basis Protection Swaps [Member] | January - December 2012 [Member] | NYMEX -$.29 [Member] | CEGT [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative, Swap Type, Fixed Price		0.29
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
50,000 Mmbtu [Member] | Natural Gas Basis Protection Swaps [Member] | January - December 2012 [Member] | NYMEX -$.29 [Member] | PEPL [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative, Swap Type, Fixed Price		0.29
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
50,000 Mmbtu [Member] | Natural Gas Basis Protection Swaps [Member] | January - December 2012 [Member] | NYMEX -$.30 [Member] | PEPL [Member]
Derivative Contract Volume (in British Thermal Units)		50,000
Derivative, Swap Type, Fixed Price		0.30
Derivative Contract Volume (in Barrels of Oil Equivalent)		50,000
100,000 Mmbtu [Member] | Natural Gas Fixed Price Swaps [Member] | March - October 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	100,000
Derivative, Swap Type, Fixed Price	3.505
Derivative Contract Volume (in Barrels of Oil Equivalent)	100,000
70,000 Mmbtu [Member] | Natural Gas Fixed Price Swaps [Member] | March - October 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	70,000
Derivative, Swap Type, Fixed Price	3.400
Derivative Contract Volume (in Barrels of Oil Equivalent)	70,000
40,000 Mmbtu [Member] | Natural Gas Fixed Price Swaps [Member] | April-December 2013 [Member] | NYMEX Henry Hub [Member]
Derivative Contract Volume (in British Thermal Units)	40,000
Derivative, Swap Type, Fixed Price	3.655
Derivative Contract Volume (in Barrels of Oil Equivalent)	40,000
40,000 Mmbtu [Member] | Natural Gas Basis Protection Swaps [Member] | January - December 2012 [Member] | NYMEX -$.30 [Member] | CEGT [Member]
Derivative Contract Volume (in British Thermal Units)		40,000
Derivative, Swap Type, Fixed Price		0.30
Derivative Contract Volume (in Barrels of Oil Equivalent)		40,000
Oil costless collars [Member] | January - December 2012 [Member] | $90 floor / $105 ceiling [Member] | NYMEX WTI [Member]
Derivative Contract Volume (in British Thermal Units)		2,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		2,000
Oil costless collars [Member] | February - December 2012 [Member] | $90 floor / $110 ceiling [Member] | NYMEX WTI [Member]
Derivative Contract Volume (in British Thermal Units)		3,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		3,000
Oil costless collars [Member] | May - December 2012 [Member] | $90 floor / $114 ceiling [Member] | NYMEX WTI [Member]
Derivative Contract Volume (in British Thermal Units)		2,000
Derivative Contract Volume (in Barrels of Oil Equivalent)		2,000