Note 4 - Real Estate - Relative Fair Value of Assets Acquired and Liabilities Assumed (Details) - 2019 Real Estate Acquisitions [Member] $ in Thousands	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Land	$ 34,350
Building	103,238
Building and site improvements	15,734
Intangible lease assets	20,222
Total real estate assets acquired	173,544
Other assets	2,725
Total assets acquired	176,269
Accounts payable and accrued expenses	(6,814)
Intangible lease liabilities	(3,451)
Deferred tax liabilities	(16,985)
Assumed mortgage and other indebtedness	(18,249)
Total liabilities assumed	(45,499)
Assets acquired net of liabilities assumed	$ 130,770