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Note 15 - Stockholders' Equity - Preferred Stock Repurchased (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Purchase price | $ 268 | $ (0)
Class L Cumulative Redeemable Preferred Stock Depositary Shares[Member] |  |
Shares repurchased (in shares) | 5,540 |
Purchase price | $ 111,000 |
Class M Cumulative Redeemable Preferred Stock Depositary Shares [Member] |  |
Shares repurchased (in shares) | 7,741 |
Purchase price | $ 157,000 |

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