Note 2 - Accounting Policies and Related Matters (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Loss on impairment of real estate assets	$ 973,000	$ 0
Contract assets	0	0
Contract liabilities	827,000	1,252,000
Accounts receivable	1,918,000	1,874,000
Other assets, net	6,327,000	4,511,000
Allowance for accounts receivables	$ 194,000	$ 165,000
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Component of derivative fair value adjustment	Component of derivative fair value adjustment
Component of derivative fair value adjustment	$ (692,000)	$ 2,638,000
Impairment of real estate assets held for sale	2,353,000	0
Properties reclassified as held for sale	0	0
Leasing commission costs	5,000
Impairment charges	$ 0	0
Gain on Business Interruption Insurance Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest and Other Income
Wind Storm
Summary Of Significant Accounting Policies [Line Items]
Proceeds of insurance	$ 2,500,000
Gain of unusual amount	500,000
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts receivable	1,900,000	2,100,000
Other assets, net	1,200,000	1,400,000
Tenant and accounts receivable, net	700,000	700,000
Allowance for accounts receivables	0	0
Deferred Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Contract liabilities	0	200,000
Intangible Lease Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Above -market lease gross value	4,200,000	5,200,000
In-place lease gross value	29,200,000	36,100,000
Unamortized Intangible Lease Liabilities [Member]
Summary Of Significant Accounting Policies [Line Items]
Below -market lease liabilities gross value	3,100,000	5,000,000
Rental Income [Member]
Summary Of Significant Accounting Policies [Line Items]
Variable lease payments	$ 7,700,000	$ 6,900,000