Note 5 - Intangibles - Summary of Expected Amortization of Real Estate Intangible Assets Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Real Estate Intangible Assets Liabilities Amortization [Line Items]
Total net real estate intangible assets		$ 0
Real Estate [Member]
Schedule Of Real Estate Intangible Assets Liabilities Amortization [Line Items]
Total net real estate intangible assets	$ 20,157,000
Amortization of below-market leases, 2020	(915,000)
Amortization of below-market leases, 2021	(784,000)
Amortization of below-market leases, 2022	(684,000)
Amortization of below-market leases, 2023	(524,000)
Amortization of below-market leases, 2024	(326,000)
Amortization of below-market leases, Thereafter	(206,000)
Amortization of below-market leases, Total	(3,439,000)
Total amortization, net,2020	4,234,000
Total amortization, net,2021	2,983,000
Total amortization, net,2022	2,520,000
Total amortization, net,2023	2,138,000
Total amortization, net,2024	1,432,000
Total amortization, net,Thereafter	3,411,000
Total amortization, net	16,718,000
In-Place Leases [Member] | Real Estate [Member]
Schedule Of Real Estate Intangible Assets Liabilities Amortization [Line Items]
2020	4,659,000
2021	3,303,000
2022	2,764,000
2023	2,275,000
2024	1,503,000
Thereafter	3,023,000
Total net real estate intangible assets	17,527,000
Above-Market Leases [Member] | Real Estate [Member]
Schedule Of Real Estate Intangible Assets Liabilities Amortization [Line Items]
2020	490,000
2021	464,000
2022	440,000
2023	387,000
2024	255,000
Thereafter	594,000
Total net real estate intangible assets	$ 2,630,000