Note 1 - Significant Accounting Policies - Schedule of Other Liabilities (Long-term) (Details) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Total other liabilities (long-term) | $ 9,988 | $ 68,690 |
| Other Noncurrent Liabilities [Member] | ||
| Dispute related to royalty deductions | 4,687 | 4,687 |
| Dispute related to royalty-in-kind | 250 | 2,235 |
| Lease liability (Note 7) | 4,419 | |
| Apache lawsuit (Note 18) | 49,500 | |
| Uncertain tax positions including interest/penalties (Note 13) | 11,523 | |
| Other liabilities, long-term | $ 632 | $ 745 |
| X | ||||||||||
- Definition Amount recognized for uncertainty in income taxes classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of loss contingency liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Represents disputes related to deductions in royalties payable after one year or beyond the normal operating cycle, if longer. No definition available.
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| X | ||||||||||
- Definition Represents disputes related to in-kind royalties payable after one year or beyond the normal operating cycle, if longer. No definition available.
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| X | ||||||||||
- Details
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