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Note 3 - Fair Value of Financial Instruments - Financial Instruments Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative Assets (Liabilities), at Fair Value, Net, Total | $ (1,827) | $ (3,106) | [1]
Fair Value of Securities | 1,541 | 1,310 |
Fair Value, Inputs, Level 1 [Member] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net, Total | 0 | 0 | [1]
Fair Value of Securities | 1,310 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net, Total | (1,827) | (3,106) | [1]
Fair Value of Securities | 0 | 0 |
Fair Value, Inputs, Level 3 [Member] |  |  |
Derivative Assets (Liabilities), at Fair Value, Net, Total | 0 | 0 | [1]
Fair Value of Securities | $ 0 | $ 0 |
[1] | Includes derivative assets of $122 at December 31, 2020.

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- Definition The fair value portion of investment in marketable securities. + References No definition available. + Details
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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958 + Details
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