Note 8 - Share-based Compensation and Cash-based Incentive Compensation - Summary of Compensation Expense Related to Share-Based Awards and Cash-Based Awards (Details) - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
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| Share-based compensation expense | $ 1,048 | $ (78) | ||
| Total charged to operating income | 5,528 | 1,894 | ||
| General and Administrative Expense [Member] | ||||
| Share-based compensation expense | 1,048 | (78) | ||
| Cash-based incentive compensation | [1] | 3,631 | 2,095 | |
| Lease Operating Expense [Member] | ||||
| Cash-based incentive compensation | [1] | $ 849 | $ (123) | |
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| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Cash-based incentive compensation charged to operating income (loss). No definition available.
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| X | ||||||||||
- Definition The total amount of share-based and cash-based incentive compensation charged to operating income. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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