Acquisitions and Divestitures - Additional Information (Details)				1 Months Ended	3 Months Ended			6 Months Ended	9 Months Ended
	Sep. 26, 2016 USD ($)	Aug. 02, 2016 USD ($) a Well shares	Jun. 15, 2016 USD ($)	Jan. 31, 2015 USD ($) a Well	Sep. 30, 2016 USD ($) Boe	Jun. 30, 2016 a Boe	Mar. 31, 2016 USD ($) a	Jun. 30, 2016 USD ($) a	Sep. 30, 2016 USD ($)		Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Purchase and sale agreement date	Sep. 26, 2016
Production related to property barrels of oil equivalents per day | Boe					436	86
Business divestitures sale price	$ 14,000,000		$ 2,200,000
Business divestiture closing date									Oct. 31, 2016
Impairment of oil and gas properties					$ 29,100,000				$ 29,100,000
Total purchase price paid									$ 3,115,000	[1]	$ 7,032,000
Gain (loss) on divestitures of business			$ 1,900,000
Business divestiture effective date of divestiture								Jul. 01, 2016
Loss on exchange of oil and gas properties				$ (629,000)
Number of non-operated wells working interest exchanged | Well				2
La Salle
Business Acquisition [Line Items]
Payments to acquire land							$ 770,000
Area of land acquired | a							220
Gonzales
Business Acquisition [Line Items]
Payments to acquire land								$ 1,600,000
Area of land acquired | a						1,088		1,088
Juneau Energy, LLC | Brazos County
Business Acquisition [Line Items]
Purchase and sale agreement date		Aug. 02, 2016
Net mineral acres | a		1,300
Total purchase price paid		$ 5,500,000
Productive Oil Wells, Number of Wells | Well		2
Undivided interest acquired in producing wells		50.00%
Eagle Ford Shale | La Salle
Business Acquisition [Line Items]
Payments to acquire land				$ 500,000
Area of land acquired | a				159
Common Class A | Juneau Energy, LLC | Brazos County
Business Acquisition [Line Items]
Shares of common stock payable in total purchase | shares		500,227

[1] Restated