Note 11 - Contingencies (Details Textual) - USD ($) $ in Thousands |
9 Months Ended | ||||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2019 |
Jul. 25, 2017 |
Dec. 31, 2010 |
|
| Additional Royalty Due to Disallowed Deductions | $ 4,700 | ||||
| Bonds Posted to Appeal IBLA Decision | $ 7,200 | ||||
| Collateral for Bonds Posted Related to Appeal with IBLA | $ 6,900 | ||||
| Long-term Debt, Total | $ 624,747 | $ 719,533 | |||
| Paycheck Protection Program CARES Act [Member] | |||||
| Long-term Debt, Total | 0 | ||||
| BSEE [Member] | |||||
| Payment for Civil Penalty | 0 | $ 0 | |||
| Proposed Civil Penalties | 7,700 | ||||
| Loss Contingency Accrual, Ending Balance | $ 3,500 | $ 3,500 | |||
| X | ||||||||||
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 Additional royalty payments made related to revised regulation interpretations referred to as unbundling. No definition available.
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| X | ||||||||||
- Definition Amount of bonds posted to appeal a decision made by the Interior Board of Land Appeals. No definition available.
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| X | ||||||||||
- Definition Cash collateral deposited related to bonds posted to appeal a decision made by the Interior Board of Land Appeals. No definition available.
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| X | ||||||||||
- Definition Payments made to government agencies for civil penalties related to incidents of non-compliance issued by the BSEE. No definition available.
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| X | ||||||||||
- Definition The amount of civil penalties proposed. No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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