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Property and Equipment - Components of Property and Equipment (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]    
Proved oil and gas properties, at cost $ 528,971 $ 527,729
Less: Accumulated depletion and depreciation (329,967) (322,409)
Oil and Gas Properties, Net 199,004 205,320
Field and office equipment 28,116 27,542
Less: Accumulated depreciation (21,136) (20,762)
Field and Office Equipment, Net 6,980 6,780
Total Property and Equipment, Net $ 205,984 $ 212,100