Leases (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset		$ 2,928		$ 2,740
Operating Lease, Payments		218	$ 39
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 2,500	306	2,572
Operating Lease, Liability, Current		927		847
Operating Lease, Liability, Noncurrent		2,335		2,232
Operating Lease, Liability		$ 3,262		$ 3,079
Operating Lease, Weighted Average Remaining Lease Term		3 years 9 months 18 days		4 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent		3.26%		5.97%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year		$ 689
Lessee, Operating Lease, Liability, Payments, Due Year Two		894
Lessee, Operating Lease, Liability, Payments, Due Year Three		874
Lessee, Operating Lease, Liability, Payments, Due Year Four		873
Lessee, Operating Lease, Liability, Payments, Due after Year Five		144
Lessee, Operating Lease, Liability, Payments, Due		3,474
Lessee, Operating Lease, Liability, Undiscounted Excess Amount		(212)
Operating Lease, Cost		210	163
Short-term Lease, Cost		11,296	11,571
Variable Lease, Cost		5,657	5,095
Amounts charged as dilling costs		(10,621)	(10,851)
Lease, Cost		6,542	5,978
Natural Gas, Gathering, Transportation, Marketing and Processing [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		2,800	2,100
Operating Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		3,500	3,700
General and Administrative Expense [Member]
Lessee, Lease, Description [Line Items]
Lease, Cost		$ 200	$ 200
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract		2 years