Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Basis of Presentation - Schedule of Other Liabilities (Long-term) (Details)

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Note 1 - Basis of Presentation - Schedule of Other Liabilities (Long-term) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Black Elk escrow and other $ 12,090 $ 632
Total other liabilities (long-term) 28,998 9,988
Other Noncurrent Liabilities [Member]    
Dispute related to royalty deductions 4,687 4,687
Dispute related to royalty-in-kind 250 250
Derivatives 2,137 0
Lease liability (Note 7) $ 9,834 $ 4,419