Note 6 - Mortgage and Other Indebtedness - Schedule of Minimum Debt Service Coverage (Details)	Dec. 31, 2021
Hollinswood Shopping Center [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.40
Vista Shops At Golden Mile [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.50
Brookhill Azalea Shopping Center [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.30
Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.30
Cromwell Field Shopping Center [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.00
Spotswood Valley Square Shopping Center [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.15
The Shops At Greenwood Village [Member]
Debt Instrument [Line Items]
Minimum Debt Service Coverage Ratio	1.40