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Note I - Income Taxes (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 21.00% |  |
Proceeds from Income Tax Refunds CARES Act |  | $ 17,100 |  |
Proceeds from Income Tax Refunds |  | 9,600 |  |
Expected Proceeds from Income Tax Refunds, Carryback of Loss |  | 7,500 |  |
Deferred Tax Assets, Valuation Allowance, Total |  | 30,841 | $ 38,379 | $ 31,170
Unrecognized Tax Benefits, Ending Balance |  | 0 | 0 |
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect |  |  | $ (11,355) |
Domestic Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total |  | 21,600 |  |
Foreign Tax Authority [Member] |  |  |  |
Operating Loss Carryforwards, Total |  | 6,200 |  |
Tax Credit Carryforward, Amount |  | 3,700 |  |
Operating Loss Carryforwards, Valuation Allowance, Total |  | 6,200 |  |
State and Local Jurisdiction [Member] |  |  |  |
Operating Loss Carryforwards, Total |  | $ 90,300 |  |
Accounting Standards Update 2018-02 [Member] |  |  |  |
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect | $ 11,400 |  |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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