Business Combination (Details) - HEYCO	Feb. 27, 2015 USD ($) a shares	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Oil and natural gas producing properties and undeveloped acreage | a	58,600
Net acreage acquired | a	(18,200)
Consideration for the business combination	$ 33,600,000
Shares of common stock converted for each share of Series A Preferred Stock | shares	10
Additional amount paid for customary purchase price adjustments	$ 3,000,000
Deferred tax liabilities assumed	75,966,000
Liabilities assumed in business combination	4,600,000
Transaction costs incurred		$ 2,500,000	$ 300,000
Common Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Shares issued in business combination	3,300,000
Preferred Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Shares issued in business combination	$ 150,000