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Note 13 - Net Income Attributable to Controlling Interests Per Common Share (Details Textual) - shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Weighted Average Number of Shares, Unvested Share-based Payment Awards, Basic (in shares) | 137,046 | 312,792 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 100,000 | 0 | 100,000
Five Point Eight Seven Five Percent Convertible Senior Notes Due Two Thousand Thirty Five [Member] |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities (in shares) |  | 100,000 |
Series A Preferred Stock [Member] |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares) | 4,000,000 | 4,000,000 | 3,800,000

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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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