Note 4 - Intangibles (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Intangible Assets And Liabilities [Line Items]
Net amortization related to intangibles	$ 5.1	$ 4.4
Weighted average remaining amortization period of below-market lease intangibles	2 years 6 months
Above-Market Leases [Member]
Schedule Of Intangible Assets And Liabilities [Line Items]
Weighted average remaining amortization period	4 years 8 months 12 days
In-Place Leases [Member]
Schedule Of Intangible Assets And Liabilities [Line Items]
Weighted average remaining amortization period	3 years 8 months 12 days