Equity and Share-Based Compensation - Chief Executive Officer Restricted Stock Units and Performance Stock Units Issued to Certain Members of Executive Management Containing a Market Condition (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Mar. 07, 2019	Mar. 01, 2018	Nov. 01, 2017	Mar. 31, 2019	Mar. 31, 2018
Share-Based Compensation
Price per Common Share of Stock for the Performance Period	$ 6.77
Assumptions used
Risk-free interest rate (as a percent)	2.45%
Expected volatility rate, (as a percent)	44.00%
Calculated fair value per restricted stock unit (in dollars per share)	$ 6.77
Share-based compensation, net of amounts capitalized to oil and gas properties				$ 966	$ 2,210
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested shares outstanding at the beginning of the period (in shares)				251,522
Granted (in shares)				161,194
Vested (in shares)				36,276
Forfeited (in shares)				18,223
Non-vested shares outstanding at the end of the period (in shares)				358,217
Weighted Average Grant Date Fair Value
Non-vested shares outstanding at the beginning of the period (in dollars per share)				$ 15.79
Granted (in dollars per share)				7.94
Vested (in dollars per share)				9.74
Forfeited (in dollars per share)				9.74
Non-vested shares outstanding at the end of the period (in dollars per share)				$ 12.30
CEO | Performance stock units
Share-Based Compensation
Vesting percent Actual TSR (in percent)			50.00%
Vesting percent Relative TSR (in percent)			50.00%
Days considered for calculation of average stock price			20 days
Assumptions used
Service period (in years)			3 years
Share-based compensation costs recognized				$ 100
Unrecognized expense for share-based compensation				$ 800
Weighted-average period for over which unrecognized expense will be recognized				1 year 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)			135,778
CEO | Performance stock units | Maximum
Share-Based Compensation
Vesting (in percent)			120.00%
Executive Management | RSU with market condition | Maximum
Share-Based Compensation
Price per Common Share of Stock for the Performance Period				$ 12.50
Vesting (in percent)				150.00%
Assumptions used
Calculated fair value per restricted stock unit (in dollars per share)				$ 12.50
Executive Management | RSU with market condition | Target
Share-Based Compensation
Price per Common Share of Stock for the Performance Period				$ 11.50
Vesting (in percent)				100.00%
Assumptions used
Calculated fair value per restricted stock unit (in dollars per share)				$ 11.50
Executive Management | RSU with market condition | Below Target
Share-Based Compensation
Price per Common Share of Stock for the Performance Period				$ 10.50
Vesting (in percent)				66.00%
Assumptions used
Calculated fair value per restricted stock unit (in dollars per share)				$ 10.50
Executive Management | RSU with market condition | Threshold
Share-Based Compensation
Price per Common Share of Stock for the Performance Period				$ 9.50
Vesting (in percent)				33.00%
Assumptions used
Calculated fair value per restricted stock unit (in dollars per share)				$ 9.50
Executive Management | Performance stock units
Assumptions used
Service period (in years)				3 years
Executive Management | 2018 Performance Stock Units
Assumptions used
Share-based compensation costs recognized				$ 100
Unrecognized expense for share-based compensation				$ 800
Weighted-average period for over which unrecognized expense will be recognized				1 year 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)		96,305
Executive Management | 2019 Performance Stock Units
Share-Based Compensation
Consecutive trading day	60 days
Assumptions used
Service period (in years)				2 years
Share-based compensation, net of amounts capitalized to oil and gas properties				$ 100
Unrecognized expense for share-based compensation				$ 1,300
Weighted-average period for over which unrecognized expense will be recognized				1 year 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in shares)	193,921			193,921
Non-vested shares outstanding at the end of the period (in shares)				193,921
Weighted Average Grant Date Fair Value
Granted (in dollars per share)				$ 6.77
Non-vested shares outstanding at the end of the period (in dollars per share)				$ 6.77
Executive Management | 2019 Performance Stock Units | Prior to vesting employment termination between 6 and 12 months of performance period
Share-Based Compensation
Percentage of share forfeited on termination employment				50.00%
Percentage of share remains eligible for vesting on termination employment				50.00%
Executive Management | 2019 Performance Stock Units | Prior to vesting employment termination between 12 and 24 months of performance period
Share-Based Compensation
Percentage of share remains eligible for vesting on termination employment				100.00%
Executive Management | Restricted Stock Units | Maximum
Share-Based Compensation
Change of control price of restricted stock units of the terminated executive will be forfeited				$ 9.50
Executive Management | Restricted Stock Units | Minimum
Share-Based Compensation
Change of control price of restricted stock units of the terminated executive will be Vested				$ 9.50