Note 8 - Mortgage and Other Indebtedness (Details Textual) $ / shares in Units, $ in Thousands			1 Months Ended	12 Months Ended
		Dec. 27, 2019 USD ($) Derivative	Dec. 31, 2019 USD ($) Subsidiary	Dec. 31, 2024 USD ($) $ / shares	Dec. 31, 2023 USD ($)	Mar. 27, 2025 USD ($)	Apr. 30, 2024 USD ($)	Feb. 08, 2024	May 05, 2023	May 01, 2023 USD ($)	Nov. 23, 2022	Aug. 01, 2022
Debt Instrument [Line Items]
Mortgage loans				$ 9,200
Long-term debt outstanding				250,623
Mortgage loan				247,050	$ 231,049
Deferred financing costs, gross				3,600	3,400
Deferred financing costs, net				2,100	2,000
Debt discounts, gross				1,200	1,300
Debt instrument net of discount				600	600
Deferred financing costs, amortization expense				900	800
Income (expenses) related to fair value adjustments on derivatives				100	1,200
Net gain on fair value change on debt held under the fair value option				2,318	2,344
Change in fair value due to credit risk on debt held under the fair value option				$ (1,651)	491
Subsequent Event [Member]
Debt Instrument [Line Items]
Mortgage loans						$ 12,100
Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				14.00%
Interest expense				$ 2,200	1,900
Capitalized interest				$ 1,400	1,100
Long term debt maturity date				Dec. 01, 2027
Mortgage loan				$ 15,000
Debt Instrument, common stock conversion price | $ / shares				$ 2
Fair value of loans				$ 16,900	16,200
Net gain on fair value change on debt held under the fair value option				2,300	2,300
Change in fair value due to credit risk on debt held under the fair value option				$ (1,700)	500
Current Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				5.00%
Capitalized Interest Rate [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				9.00%
Capitalized Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				9.00%
Debt Instrument, interest rate increase each year				1.00%
Initial Capitalized Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				7.00%
Initial Mezzanine Loan Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				12.00%
Interest Rate Swap [Member] | Derivative Assets [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets				$ 700	800
Interest Rate Swap [Member] | Accounts Payable and Accrued Liabilities [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets				$ 100
Basis Term Loan [Member]
Debt Instrument [Line Items]
Number of subsidiaries as borrowers entered in loan agreement | Subsidiary			6
Maturity date description				The Basis Term Loan initial maturity was January 1, 2023, subject to two one-year extension options, subject to certain conditions.
Debt instrument net of discount				$ 0	$ 21
Basis Term Loan [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate			3.97%		3.97%
Basis Term Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Mortgage loans		$ 66,900
Debt instrument, effective interest rate					8.62%
Basis Term Loan [Member] | Interest Rate Cap [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				3.50%
Basis Term Loan [Member] | Interest Rate Cap [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate		3.97%
Debt instrument variable rate											4.65%	3.50%
Basis Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Mortgage loans			$ 66,900
Debt instrument variable rate			6.125%		6.125%
Basis Term Loan [Member] | Maximum [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate		6.125%
Hollinswood Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate		4.06%
Hollinswood Loan [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Long-term debt outstanding		$ 10,200
Debt instrument additional borrowing available		$ 3,000
Number of derivatives held | Derivative		2
Vista Shops at Golden Mile Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate	[1]			6.90%
Debt instrument net of discount				$ 82	$ 9
Vista Shops at Golden Mile Loan [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate								6.90%
Debt instrument, effective interest rate								6.90%
Cromwell Field Shopping Center Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				6.71%
Debt instrument net of discount				$ 45	60
Midtown Colonial and Midtown Lamonticello Properties [Member | Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loans							$ 19,200
Debt instrument variable rate							7.92%
Greenwood Village [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate										5.85%
Greenwood Village [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate										5.85%
Greenwood Village [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate										5.85%
Amount recieved on termination										$ 2,200
Highlandtown Village Shopping Center Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				6.09%
Debt instrument net of discount				$ 29	$ 38
Highlandtown Village Shopping Center Loan [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate									6.085%

[1] On February 8, 2024, the Company refinanced the Vista Shops at Golden Mile Loan. The maturity date of the new loan is February 8, 2029. The Company entered into an interest rate swap which fixes the interest rate of the new loan at 6.90% for the term of the loan.