Leases - Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Lease operating expense	$ 29,131	$ 28,683
Total lease expense	1,016	1,085
General and administrative expense
Lessee, Lease, Description [Line Items]
Lease operating expense	786	754
Depreciation, depletion and amortization
Lessee, Lease, Description [Line Items]
Amortization of right-of-use assets	217	298
Interest expense, net
Lessee, Lease, Description [Line Items]
Interest on lease liability	$ 13	$ 33