Note 4 - Other Revenues - Summary of Other Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Rental income	$ 5,679	$ 5,608
Management and accounting services fees	4,478	4,751
Insurance services	1,382	1,524
Other	490	291
Total other revenues	$ 12,029	$ 12,174