Note 15 - Stockholders' Equity - Preferred Stock Repurchased (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Purchase price	$ 3,441	$ (0)
Class L Cumulative Redeemable Preferred Stock Depositary Shares[Member]
Shares repurchased (in shares)	54,508
Purchase price	$ 1,300
Class M Cumulative Redeemable Preferred Stock Depositary Shares [Member]
Shares repurchased (in shares)	90,760
Purchase price	$ 2,100