Restatement of Previously Issued Financial Statements - Schedule of Consolidated Balance Sheets, Including Balances Originally Reported, Corrections and Restated Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Oil and gas properties, net	$ 556,171	$ 428,336
Total assets	591,808	448,217
Liabilities and Stockholders’ Equity
Deferred tax liability	4,769	33,960
Total liabilities	388,118	288,656
Accumulated deficit	(113,836)	(70,351)	$ 28,349
Total stockholders' equity	203,690	159,561	180,497
As Reported
Assets
Oil and gas properties, net	571,163	439,228
Total assets	606,800	459,109
Liabilities and Stockholders’ Equity
Deferred tax liability	8,105	38,020
Total liabilities	391,454	292,716
Accumulated deficit	(102,180)	(63,517)	30,818
Total stockholders' equity	215,346	166,395	182,966
Correction
Assets
Oil and gas properties, net	(14,992)	(10,892)
Total assets	(14,992)	(10,892)
Liabilities and Stockholders’ Equity
Deferred tax liability	(3,336)	(4,060)
Total liabilities	(3,336)	(4,060)
Accumulated deficit	(11,656)	(6,834)	(2,469)
Total stockholders' equity	$ (11,656)	$ (6,834)	$ (2,469)