Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Thousands					1 Months Ended	3 Months Ended		12 Months Ended
	Nov. 03, 2017 shares	Jun. 15, 2017 $ / shares Rate shares	Dec. 22, 2016 USD ($) $ / shares shares	Aug. 02, 2016 USD ($) a Well shares	Jul. 31, 2016 shares	Dec. 31, 2017 $ / shares shares	Sep. 30, 2017 shares	Dec. 31, 2017 USD ($) $ / shares Rate shares	Dec. 31, 2016 USD ($) $ / shares
Class Of Stock [Line Items]
Preferred stock, authorized						10,000,000		10,000,000
Preferred stock, par value | $ / shares						$ 0.001		$ 0.001
Minimum percentage of outstanding common stock beneficially own by approved holders		10.00%
Proceeds from issuance of common stock, net of offering costs | $									$ 72,807
Total consideration paid | $								$ 113,726	$ 4,340
Juneau Energy, LLC | Brazos County
Class Of Stock [Line Items]
Purchase and sale agreement date				Aug. 02, 2016
Undivided interest acquired in producing wells				50.00%
Productive Oil Wells, Number of Wells | Well				2
Net mineral acres | a				1,300
Total consideration paid | $				$ 5,500
Senior Unsecured Notes
Class Of Stock [Line Items]
Unsecured notes, maturity period								2 years
Debt instrument interest rate						9.00%		9.00%
Battlecat and Marquis
Class Of Stock [Line Items]
Number of shares issued in connection with acquisition		1,500,000
Series A-1 Convertible Participating Preferred Stock
Class Of Stock [Line Items]
Preferred stock, par value | $ / shares						$ 0.001		$ 0.001	$ 0.001
Conversion of Stock Conversion Rate								the Stated Value of such share divided by six
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 | Rate		200.00%
Threshold percentage of conversion price after June 15, 2019 but before June 15, 2020 | Rate		175.00%
Threshold percentage of conversion price after June 15, 2020 | Rate		150.00%
Preferred stock, dividend rate, percentage								20.00%
Stock conversion terms								the Company, at its option, may instead elect to exchange each share of Series A-1 Preferred Stock for senior unsecured notes of the Company with a two-year maturity, a 9.0% per annum coupon payable semi-annually in cash, and governed by terms substantially similar to the Company’s most recent high yield indenture at that time.
Preferred Stock Dividends, Shares							1,991	1,991
Series A-1 Convertible Participating Preferred Stock | Battlecat and Marquis
Class Of Stock [Line Items]
Number of shares issued		5,400
Preferred stock, par value | $ / shares		$ 0.001
Series A-2 Convertible Participating Preferred Stock
Class Of Stock [Line Items]
Preferred Stock Dividends, Shares						1,977
Series A-2 Convertible Participating Preferred Stock | Battlecat and Marquis
Class Of Stock [Line Items]
Preferred stock, par value | $ / shares		$ 0.001
Convertible participating preferred stock, number of shares issued		74,600
Series B Convertible Participating Preferred Stock
Class Of Stock [Line Items]
Preferred stock, par value | $ / shares						$ 0.001		$ 0.001	$ 0.001
Preferred stock to common stock conversion basis								one-for-one
Shares issued upon conversion	1
Series B Convertible Participating Preferred Stock | Battlecat and Marquis
Class Of Stock [Line Items]
Number of shares issued in connection with acquisition		1,184,632
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 | $ / shares								$ 975
Preferred stock, increase in dividend rate for next succeeding dividend period | Rate								5.00%
Preferred stock, additional increase in dividend rate for each successive dividend period | Rate								1.00%
Series A Preferred Stock | Prior to June 15, 2021
Class Of Stock [Line Items]
Preferred stock redemption percentage								110.00%
Series A Preferred Stock | Prior to June 15, 2022
Class Of Stock [Line Items]
Preferred stock redemption percentage								105.00%
Series A Preferred Stock | After June 15, 2022
Class Of Stock [Line Items]
Preferred stock redemption percentage								100.00%
Series A Preferred Stock | Maximum
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage | Rate								20.00%
Class A Voting Common Stock
Class Of Stock [Line Items]
Number of shares issued	2,684,632
Preferred stock to common stock conversion basis								one-for-one
Shares issued upon conversion			1
Preferred stock, liquidation preference per share | $ / shares		$ 1,000
Class A Voting Common Stock | Juneau Energy, LLC | Brazos County
Class Of Stock [Line Items]
Number of shares issued in connection with acquisition				500,227
Class A Voting Common Stock | 2016 Common Stock Offering
Class Of Stock [Line Items]
Number of shares issued			13,800,000
Shares issued, price per share | $ / shares			$ 5.75
Proceeds from issuance of common stock, net of offering costs | $			$ 71,800
Class B Non-Voting Common Stock
Class Of Stock [Line Items]
Common stock, shares issued					2,500