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Note 6 - Other Investments (Details Textual) $ in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Preferred Equity Investments [Member] |  |  |
Equity Method Investments | $ 108.3 | $ 108.3 |
Number of Real Estate Properties | 49 | 49 |
Income (Loss) from Equity Method Investments, Total |  | $ 8.5 | $ 26.8
Equity Method Investment, Realized Gain (Loss) on Disposal, Total |  | (1.2) | $ 15.9
Preferred Equity Investments [Member] | San Antonio, Texas [Member] |  |  |
Payments to Acquire Equity Method Investments |  | $ 54.9 |
Preferred Equity Investments [Member] | Leased Properties [Member] |  |  |
Number of Real Estate Properties | 38 | 38 |
Fifth Wall's Climate Technology Fund [Member] |  |  |
Equity Method Investment, Commitment Amount | $ 25.0 | $ 25.0 |
Payments to Acquire Equity Method Investments | $ 2.3 |  |

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