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Note 9 - Stock Incentive Plan (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2025 | Dec. 31, 2024
Minimum [Member] |  |  |  |  |
Decline of Book Value Per Share |  | 15.00% | 10.00% |  |
Performance Shares [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) | [1],[2] |  |  | 2,393 | 14,365
Share-Based Compensation Arrangement by Share-Based Payment Award, Increase (Decrease) in Number of Awards Due to Impairment (in shares) |  |  |  |  | (14,365)
Performance Shares [Member] | Former Employee [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) |  |  |  | 2,393 |
Stock Awards [Member] |  |  |  |  |
Share-Based Payment Arrangement, Amount Accrued |  |  |  | $ 0.6 | $ 0.6
The 2021 Incentive Plan [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum |  |  |  | 10.00% |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  | 1,473,324 |
[1] | During 2024, the number of shares of common stock issuable upon the vesting of the remaining outstanding PUs as of December 31, 2023 was reduced by 14,365 shares as a result of a book value impairment event that occurred pursuant to the terms of the long term equity incentive compensation plans (the “Plans”) established under the Company’s Incentive Plans. The book value impairment event occurred when the Company's book value per share declined by more than 15% during the quarter ended September 30, 2023 and the Company’s book value per share decline from July 1, 2023 to December 31, 2023 was more than 10%. The Plans provide that if such a book value impairment event occurs, then the number of outstanding PUs that are outstanding as of the last day of such two quarter period shall be reduced by 15%.
[2] | During 2025, a participant's service as an employee of the Manager ended resulting in the forfeiture of 2,393 PUs as provided in the Plans (as defined below).

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-4 + Details
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