Note 4 - Intangibles (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Net amortization related to above market leases and below market leases	$ (0.1)	$ (0.1)	$ (0.3)	$ (0.3)
Weighted average remaining amortization period of below-market lease intangibles			1 year 9 months 18 days
In-Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of in-place leases	$ 1.8	$ 1.6	$ 5.7	$ 3.6
Weighted average remaining amortization period of in-place lease intangibles			3 years
Above-Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining amortization period of above-market lease intangibles			4 years