Common Stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Jun. 21, 2016	May 18, 2016	Dec. 19, 2014	Dec. 31, 2016	Dec. 31, 2014	Dec. 31, 2015
Capital Unit [Line Items]
Common stock, shares issued				22,289,177		13,835,128
Treasury stock, shares				15,357		15,357
Common stock issued, net of offering costs and contributions, shares	4,753,770
Shares issued, price per share	$ 10.50
Net proceeds from issuance of common stock	$ 47,100			$ 47,125
Stock issuance costs	$ 2,700			2,700
Lynden Arrangement [Member]
Capital Unit [Line Items]
Total consideration		$ 45,698		$ 45,699
Common stock issued, net of offering costs and contributions, shares		3,700,279
Flatonia Energy, LLC [Member]
Capital Unit [Line Items]
Additional ownership interest acquired in certain crude oil and natural gas properties					20.00%
Common Stock [Member]
Capital Unit [Line Items]
Common stock issued, net of offering costs and contributions, shares				4,753,770
Common Stock [Member] | Lynden Arrangement [Member]
Capital Unit [Line Items]
Reverse acquisition, shares		3,700,279		3,700,279
Total consideration		$ 45,700
Common Stock [Member] | Oak Valley Resources, LLC [Member]
Capital Unit [Line Items]
Reverse acquisition, shares			9,124,452		1,753,388
Reverse acquisition, shares			1,753,388
Common Stock [Member] | Flatonia Energy, LLC [Member]
Capital Unit [Line Items]
Reverse acquisition, shares					2,957,288
Treasury Stock [Member] | Oak Valley Resources, LLC [Member]
Capital Unit [Line Items]
Treasury stock, shares					15,357
Reverse acquisition, shares					(15,357)