Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended				6 Months Ended	9 Months Ended	18 Months Ended
	Sep. 28, 2018	Jun. 30, 2017	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Minimum percentage of outstanding common stock beneficially own by approved holders		10.00%
Debt instrument interest rate (as a percent)			11.25%				11.25%
Retirement of Class B Common Stock, shares (in shares)	2,500,000
Retirement of Class B Common Stock, value	$ 10,000
Senior Unsecured Notes
Class of Stock [Line Items]
Unsecured notes, maturity period							2 years	2 years
Debt instrument interest rate (as a percent)			9.00%				9.00%
Series A-1 Convertible Participating Preferred Stock
Class of Stock [Line Items]
Conversion of stock threshold trading days		20 days
Conversion of stock threshold consecutive trading days		30 days
Threshold percentage of conversion price prior to June 15, 2019		200.00%
Threshold percentage of conversion price after June 15, 2019 but before June 15, 2020		175.00%
Threshold percentage of conversion price after June 15, 2020		150.00%
Preferred stock, dividend rate, percentage							20.00%
Payment-in-kind dividends (in shares)			2,112	2,065	1,932	1,889	4,177		11,784,000
Series A-1 Convertible Participating Preferred Stock | Battlecat and Marquis
Class of Stock [Line Items]
Number of shares issued (in shares)		5,400,000
Preferred stock, par value (in dollars per share)		$ 0.001
Series A-2 Convertible Participating Preferred Stock | Battlecat and Marquis
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)		$ 0.001
Convertible participating preferred stock, number of shares issued (in shares)		74,600,000
Series B Convertible Participating Preferred Stock
Class of Stock [Line Items]
Preferred stock to common stock conversion basis							one-for-one
Series B Convertible Participating Preferred Stock | Battlecat Oil & Gas, LLC
Class of Stock [Line Items]
Number of shares issued in connection with acquisition (in shares)		1,000,000
Series B Convertible Participating Preferred Stock | SN Marquis LLC
Class of Stock [Line Items]
Number of shares issued in connection with acquisition (in shares)		2,000,000
Series A Preferred Stock
Class of Stock [Line Items]
Minimum percentage of outstanding preferred stock beneficially own by approved holders		15.00%
Preferred stock, dividend rate, percentage							9.00%
Shares issued, price per share (in dollars per share)							$ 975
Preferred stock, increase in dividend rate for next succeeding dividend period							5.00%
Preferred stock, additional increase in dividend rate for each successive dividend period							1.00%
Preferred stock redemption percentage							110.00%
Preferred stock redemption percentage							105.00%
Preferred stock redemption percentage							100.00%
Series A Preferred Stock | Maximum
Class of Stock [Line Items]
Preferred stock, dividend rate, percentage							20.00%
Class A Voting Common Stock
Class of Stock [Line Items]
Preferred stock, liquidation preference per share (in dollars per share)		$ 1,000