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Note 10 - Impairment of Long-lived Assets (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Loss on impairment of Long-Lived Assets | $ 0 | $ 0 | $ 0 | $ 33,780
Residential Property At 10 West 65th Street [Member] |  |  |  |
Loss on impairment of Long-Lived Assets |  |  | 33,780 |
Disposal Group, Including Discontinued Operation, Consideration | $ 45,500 |  | $ 45,500 |

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- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-3 + Details
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Period Type: | instant

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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- Details
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Balance Type: |
Period Type: |