Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	$ (364)	$ (1,055)
Stock-based compensation	(2,365)	(1,903)
Total	(6,342)	19,734
Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	6,849	23,143
Commodity derivatives	(10,462)	(451)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	0	0
Stock-based compensation	(1,792)	(1,267)
Total	(1,792)	(1,267)
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Commodity derivatives	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	0	0
Stock-based compensation	0	0
Total	(3,613)	22,692
Significant Other Observable Inputs (Level 2) | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	6,849	23,143
Commodity derivatives	(10,462)	(451)
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants	(364)	(1,055)
Stock-based compensation	(573)	(636)
Total	(937)	(1,691)
Significant Unobservable Inputs (Level 3) | Commodity Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Commodity derivatives	$ 0	$ 0