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Note 8 - Earnings Per Share (Details Textual) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Jun. 30, 2022
Restricted Stock Units (RSUs) [Member] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |  | 341,545 | 323,377
Prefunded Warrants [Member] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |  | 3,930,000 | 3,930,000
Warrant [Member] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) |  | 560,000 | 560,000
Share-Based Payment Arrangement, Option [Member] |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 0 | 0 |

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- 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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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