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Note 14 - Financial Instruments (Details Textual) $ in Thousands |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 21, 2020 USD ($) | Jan. 21, 2020 USD ($) | Jul. 15, 2019 USD ($) | Jan. 17, 2019 USD ($) | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) | Nov. 06, 2019 shares
Assets Held-for-sale, Not Part of Disposal Group, Total |  |  |  |  |  | $ 55,581 |  |
Assets Held-for-sale, Long Lived, Fair Value Disclosure |  |  |  |  |  | 43,271 |  |
Impairment of Long-Lived Assets to be Disposed of |  |  |  |  |  | 12,310 |  |
Equity Method Investments |  |  |  |  |  | 22,450 |  |
Equity Method Investments, Fair Value Disclosure |  |  |  |  |  | 19,306 |  |
Equity Method Investment, Other than Temporary Impairment |  |  |  |  | $ (0) | $ 3,144 | $ (0) |
Increase (Decrease) in Volatility Rate Applied |  |  |  |  | 5.00% |  |  |
Fair Value Assumptions Resulting Increase (Decrease) in Fair Value |  |  |  |  | 1.00% |  |  |
Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  | 1.09 |  |  |
Class B Warrants [Member] |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  |  |  |  | 168,000 | 168,000 |  | 168,000
Class B Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  |  |  | 1.34
Interest Rate Swap [Member] |  |  |  |  |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain |  |  |  | $ 213 |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Loss | $ 927 | $ 405 | $ 205 |  |  |  |  |

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- Definition Fair value portion of assets classified as held for sale. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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