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Note 8 - Fair Value Measurements (Details Textual) $ in Thousands | Dec. 20, 2011 | Jun. 30, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | --- | ---
Debt Securities, Available-for-Sale, Amortized Cost, Total |  | $ 17,800 |
Debt Security Interest Rate Stated Percentage |  | 7.50% |
Debt Security, Available-For-Sale, Fair Value Discount Amount |  | $ 2,300 | $ 2,300
Business Combination Contingent Consideration Arrangements, Payment To Option Holder Percentage Of Ebitda | 1.00% |  |
Business Combination, Contingent Consideration, Liability, Total |  | 0 | 0
Business Combination, Contingent Consideration, Liability, Current |  |  | 100
Prepaid Expenses and Other Current Assets [Member] |  |  |
Debt Securities, Available-for-Sale, Current |  | 700 | 600
Other Noncurrent Assets [Member] |  |  |
Debt Securities, Available-for-Sale, Noncurrent |  | $ 13,400 | $ 15,200
Measurement Input, Discount Rate [Member] |  |  |
Debt Securities, Available-for-Sale, Measurement Input |  | 0.116 | 0.101

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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