Note 4 - Intangibles - Summary of Carrying Amount of Intangible Assets and Liabilities (Details) - Real Estate [Member] - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets:
Above-market leases	$ 5,150	$ 5,150
In-place leases	36,078	36,078
Total net real estate intangible assets	18,233	20,778
Liabilities
Below-market leases	4,992	4,992
Below-market leases accumulated amortization	(3,632)	(3,439)
Total net real estate intangible liabilities	1,360	1,553
Above-Market Leases [Member]
Assets:
Accumulated amortization	(2,440)	(2,199)
Total net real estate intangible assets	2,710
In-Place Leases [Member]
Assets:
Accumulated amortization	(20,555)	$ (18,251)
Total net real estate intangible assets	$ 15,523