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Note T - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 09, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Lease, Expense |  | $ 1,230 | $ 1,206 |
Loss Contingency, Obligation for Sales and Use Tax [Member] |  |  |  |
Loss Contingency, Potential Obligation | $ 1,000 |  |  |
Loss Contingency Accrual, Payments | 400 |  |  |
Loss Contingency, Obligation for Sales and Use Tax [Member] | Minimum [Member] |  |  |  |
Loss Contingency, Estimate of Possible Loss | 200 |  |  |
Loss Contingency, Obligation for Sales and Use Tax [Member] | Maximum [Member] |  |  |  |
Loss Contingency, Estimate of Possible Loss | $ 400 |  |  |
Other Commitments, Rent Expense [Member] |  |  |  |
Operating Lease, Expense |  | $ 1,300 | $ 1,400 | $ 1,300

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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
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