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Note J - Earnings Per Share (Details Textual) - shares shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Share-based Payment Arrangement, Option [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 32 | 100
Unvested Shares [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 500 | 200
Convertible Preferred Stock [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 1,000 | 1,000
Series A Preferred Stock [Member] |  |
Preferred Stock, Dividend Rate, Percentage | 5.00% |

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
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