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Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | --- | ---
Total assets | $ 62,743 | $ 71,995 | $ 80,493
Interest rate swap | 5,001 | 7,606 | 8,353
Total liabilities | 5,001 | 7,606 | 8,353
Fair Value, Inputs, Level 1 [Member] |  |  |
Total assets | 62,743 | 71,995 | 80,493
Interest rate swap | 0 | 0 | 0
Total liabilities | 0 | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |  |
Total assets | 0 | 0 | 0
Interest rate swap | 5,001 | 7,606 | 8,353
Total liabilities | 5,001 | 7,606 | 8,353
Fair Value, Inputs, Level 3 [Member] |  |  |
Total assets | 0 | 0 | 0
Interest rate swap | 0 | 0 | 0
Total liabilities | 0 | 0 | 0
Money Market Funds [Member] |  |  |
Cash equivalents | 61,231 | 70,483 | 78,981
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Cash equivalents | 61,231 | 70,483 | 78,981
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Cash equivalents | 0 | 0 | 0
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Cash equivalents | 0 | 0 | 0
Restricted Cash [Member] |  |  |
Other noncurrent assets | 1,512 | 1,512 | 1,512
Restricted Cash [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Other noncurrent assets | 1,512 | 1,512 | 1,512
Restricted Cash [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Other noncurrent assets | 0 | 0 | 0
Restricted Cash [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Other noncurrent assets | $ 0 | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value of all liability derivatives designated as cash flow hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Fair value portion of other assets. + References No definition available. + Details
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