Note 7 - Mortgage and Other Indebtedness (Details Textual) $ / shares in Units, $ in Thousands													1 Months Ended	12 Months Ended
		Feb. 08, 2024 USD ($)	Dec. 21, 2023 USD ($)	Oct. 31, 2023 USD ($)	Sep. 29, 2023 USD ($)	Jul. 31, 2023 USD ($)	Jul. 20, 2023 USD ($)	Jun. 30, 2023 USD ($)	May 05, 2023 USD ($)	May 03, 2023	May 01, 2023 USD ($)	Dec. 27, 2019 USD ($) Derivative	Dec. 31, 2019 USD ($) Subsidiary	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)	Jun. 28, 2023	Nov. 23, 2022	Aug. 01, 2022	Oct. 06, 2021 USD ($)
Debt Instrument [Line Items]
Mortgage loans														$ 11,300
Long-term debt outstanding														$ 233,772
Maturity date description														the Basis Term Loan has an outstanding balance of $8.5 million and matures on July 1, 2024.
Debt instrument variable rate																7.73%
Interest expense														$ 18,504	$ 12,710
Mortgage loan														231,049	267,616
Deferred financing costs, gross														3,400	3,200
Deferred financing costs, net														2,000	1,900
Debt discounts, gross														1,300	2,100
Debt instrument net of discount														600	400
Deferred financing costs, amortization expense														800	1,500
Income (expenses) related to fair value adjustments on derivatives														1,200	3,400
Net gain (loss) on fair value change on debt held under the fair value option														2,344	(3,151)
Change in fair value due to credit risk on debt held under the fair value option														$ 491	56
Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate														13.00%
Interest expense														$ 1,900	200
Capitalized interest														$ 1,100	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														$ 16,200	17,900
Net gain (loss) on fair value change on debt held under the fair value option														2,300	(3,100)
Change in fair value due to credit risk on debt held under the fair value option														$ 500	100
Current Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate														5.00%
Capitalized Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate														8.00%
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 Cap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets															200
Interest Rate Swap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets														$ 800	3,200
Basis Term Loan [Member]
Debt Instrument [Line Items]
Number of subsidiaries as borrowers entered in loan agreement | Subsidiary													6
Mortgage loans														8,500	66,900
Long-term debt outstanding														$ 8,500
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 variable rate														8.62%
Debt instrument net of discount														$ 21	$ 79
Debt instrument, effective interest rate														8.62%
Repayments of secured debt			$ 13,900	$ 12,800	$ 14,300	$ 17,400	$ 17,400							$ 41,000
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%	6.125%
Basis Term Loan [Member] | Interest Rate Cap [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate												3.50%
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%
Lamont Street Preferred Interest [Member]
Debt Instrument [Line Items]
Repayments of secured debt								$ 2,300
Hollinswood Loan [Member] | SOFR [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate										2.36%
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]													7.73%
Debt instrument net of discount														$ 9	$ 12
Vista Shops at Golden Mile Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of secured debt		$ 11,200
Vista Shops at Golden Mile Loan [Member] | Interest Rate Swap [Member] | Subsequent Event [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														$ 60	$ 77
Highlandtown Mortgage [Member]
Debt Instrument [Line Items]
Repayments of secured debt									$ 1,900
Crestview Square Shopping Center [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loan					$ 12,000
Debt instrument, effective interest rate					7.83%
Coral Hills Shopping Center [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loan				$ 12,800
Debt instrument, effective interest rate				6.95%
West Broad [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loan			$ 11,800
Debt instrument, effective interest rate			7.00%
Greenwood Village [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loan																			$ 23,500
Debt instrument, effective interest rate											5.85%
Greenwood Village [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate											2.85%
Debt instrument, effective interest rate											5.85%
Greenwood Village [Member] | SOFR [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate											2.85%
Greenwood Village [Member] | Prime Rate [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																			0.35%
Greenwood Village [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest Rate																			4.082%
Debt instrument, effective interest rate											5.85%				4.082%
Amount recieved on termination											$ 2,200
Greenwood Village [Member] | Interest Rate Swap [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate																			4.082%
Highlandtown Village Shopping Center Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate														4.13%
Debt instrument variable rate	[2]													6.09%
Debt instrument net of discount														$ 38	$ 14
Highlandtown Village Shopping Center Loan [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate									6.085%
Debt instrument, effective interest rate									6.085%

[1] On June 28, 2023, the Company entered into an agreement to amend the interest rate to 7.73% and extend the maturity date of this loan to June 24, 2024. On February 8, 2024, the Company refinanced the Vista Shops at Golden Mile Loan to extend the maturity date to February 8, 2029 and entered into an interest rate swap which fixes the interest rate of the new loan at 6.90%.

[2] On May 5, 2023, the Company refinanced the Highlandtown Village Shopping Center Loan to extend the maturity date to May 10, 2028 and entered into an interest rate swap which fixes the interest rate of the new loan at 6.085% as described below under the heading “—Mortgage Indebtedness”. The prior loan carried an interest rate of 4.13%.