Note 1 - Basis of Presentation - Schedule of Other Liabilities (Long-term) (Details) - USD ($) $ in Thousands |
Jun. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Apache lawsuit | $ 49,500 | $ 49,500 |
| Uncertain tax positions including interest/penalties | 11,523 | |
| Dispute related to royalty deductions | 4,687 | 4,687 |
| Dispute related to royalty-in-kind | 2,197 | 2,135 |
| Other liabilities, long-term | 5,001 | 845 |
| Total other liabilities (long-term) | $ 61,385 | $ 68,690 |
| 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 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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