Note 5 - Other Revenues - Summary of Other Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Rental income	$ 5,830	$ 5,792	$ 17,642	$ 16,954
Management and accounting services fees	3,922	4,244	11,993	12,703
Insurance services	1,015	1,291	3,497	3,832
Other	(171)	164	452	427
Total other revenues	$ 10,596	$ 11,491	$ 33,584	$ 33,916