Commitments and Contingencies (Estimated Obligations and Companies Share for the Annual Charter Payment) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
VAALCO ENERGY, INC. [Member]
Estimated obligation and company share for annual charter payment
Annual charter payment, 2020	$ 10,010
Annual charter payment, 2021	7,467
Annual charter payment, Total	17,477
Full Charter Payment [Member]
Estimated obligation and company share for annual charter payment
Annual charter payment, 2020	32,233
Annual charter payment, 2021	24,042
Annual charter payment, Total	$ 56,275