Derivative And Financial Instruments (Changes In Fair Value) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Warrants
Derivative [Line Items]
Net gain (loss)	$ 664
Ending fair value	$ 664
Commodity derivatives
Derivative [Line Items]
Beginning fair value		$ (759)
Net gain (loss)		3,901
Oil | Commodity derivatives
Derivative [Line Items]
Net gain (loss)		3,814
Net settlements received on derivative contracts		(2,829)
Natural Gas | Commodity derivatives
Derivative [Line Items]
Net gain (loss)		87
Net settlements received on derivative contracts		$ (313)