Summary of Significant Accounting Policies (Details Textual) (USD $)	1 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Summary of Significant Accounting Policies [Line Items]
Income Tax Expense Recorded						$ 0
Summary of Significant Accounting Policies (Textual) [Abstract]
Dividends paid						0	96,000
Summary of Significant Accounting Policies (Additional Textual) [Abstract]
Capitalized general and administrative costs						2,300,000	1,700,000
Capitalized interest expense	1,000,000					(1,200,000)
Present value discounted percent of future net revenues of proved oil and natural gas reserves						10.00%
Average oil and natural gas prices								91.69	91.48
Net capitalized costs less related deferred income taxes exceeded the full-cost ceiling			13,700,000	2,300,000	21,300,000
Impairment charge of net capitalized costs		0	21,229,000	3,596,000	33,200,000	21,229,000	36,801,000
Deferred income tax credit			7,500,000	1,300,000	11,900,000
Dividends declared						0	27,643
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total options to purchase shares of the Company's common stock and restricted stock excluded from the calculations		1,085,152				1,293,568
Restricted stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total options to purchase shares of the Company's common stock and restricted stock excluded from the calculations				233,349		139,963	231,683
Class A [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Dividends paid						0
Initial public offering						1,030,700
Class B [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Total dividend paid					$ 96,356
Class B [Member] | Maximum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Cumulative annual dividends per share rate		$ 0.66
Class B [Member] | Minimum [Member]
Summary of Significant Accounting Policies (Textual) [Abstract]
Cumulative annual dividends per share rate		$ 0.26