Note 17 - Subsequent Events (Details Textual) - Subsequent Event [Member] $ in Millions	Dec. 11, 2020 USD ($)	Jul. 02, 2020 Merger
COVID-19 [Member]
Subsequent Event [Line Items]
Deferred contractual revenue	$ 0.3
Deferred contractual revenue waived	$ 0.3
Weighted average payback period of deferred rent	7 months
MedAmerica [Member] | Lamar Station Plaza East and Cromwell Field Shopping Center [Member]
Subsequent Event [Line Items]
Number of merger closed | Merger		1