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Note 5 - Derivative Financial Instruments - Net Derivative Liabilities By Counterparty (Details) - Commodity Contract [Member] $ in Thousands | Jun. 30, 2022 USD ($)
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Net derivative liabilities | $ (31,909)
Fifth Third Bank, National Association [Member] |
Net derivative liabilities | (22,656)
Bank of America, National Association [Member] |
Net derivative liabilities | (9,643)
Bank of Oklahoma, National Association [Member] |
Net derivative liabilities | (3,668)
Citizens Bank, National Association [Member] |
Commodity price derivatives | $ 4,058

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