Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Derivative Financial Instruments - Cash Receipts on Commodity Derivative Contract Settlements (Details)

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Note 6 - Derivative Financial Instruments - Cash Receipts on Commodity Derivative Contract Settlements (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Cash receipts on derivative settlements, net $ 4,404 $ 11,948