Note 2 - Accounting Policies and Related Matters (Details Textual)	12 Months Ended
	Dec. 31, 2024 USD ($) Segment Property	Dec. 31, 2023 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of reporting segment | Segment	1
Loss on impairment of real estate assets	$ 560,000	$ 973,000
Contract assets	0	0
Contract liabilities	841,000	827,000
Receivables due from related parties	1,465,000	1,663,000
Other assets, net	6,564,000	6,327,000
Tenant and accounts receivable, net	1,690,000	1,918,000
Allowance for credit losses of accounts receivables	374,000	194,000
Receivables due from related party	1,000,000	1,100,000
Allowance for credit losses of other receivables	$ 400,000	$ 200,000
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	$ 589,000	$ (692,000)
Impairment of real estate assets held for sale	0	2,353,000
Properties reclassified as held for sale	$ 0	0
Number of Properties | Property	15
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	Interest and Other Income
Wind Storm [Member]
Summary Of Significant Accounting Policies [Line Items]
Proceeds of insurance		$ 2,500,000
Gain of unusual amount		500,000
Fire [Member]
Summary Of Significant Accounting Policies [Line Items]
Number of Properties | Property	2
Proceeds of insurance	$ 2,500,000
Unspent funds	100,000
Gain of unusual amount	300,000
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Receivables due from related parties	2,100,000	1,900,000
Other assets, net	1,200,000	1,200,000
Tenant and accounts receivable, net	900,000	700,000
Allowance for credit losses of accounts receivables	0	0
Deferred Revenue [Member]
Summary Of Significant Accounting Policies [Line Items]
Contract liabilities	0	0
Intangible Lease Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Above -market lease gross value	4,200,000	4,200,000
In-place lease gross value	28,800,000	29,200,000
Unamortized Intangible Lease Liabilities [Member]
Summary Of Significant Accounting Policies [Line Items]
Below -market lease liabilities gross value	3,100,000	3,100,000
Rental Income [Member]
Summary Of Significant Accounting Policies [Line Items]
Variable lease payments	$ 8,100,000	$ 7,700,000