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Note 2 - Income Per Share (Details Textual) - shares | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares) | 167,000 | 132,000
Restricted Stock [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share Because the Performance Targets Were Not Achieved , Amount (in shares) | 153,000 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 0 | 0
Share-Based Payment Arrangement, Option [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share Because the Performance Targets Were Not Achieved , Amount (in shares) | 196,000 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 0 | 0

X
- Definition Represents antidilutive securities excluded from computation of earnings per share because the performance targets were not achieved. + References No definition available. + Details
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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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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