Note 7 - Mortgage and Other Indebtedness - (Details Textual) $ / shares in Units, $ in Thousands										1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
		Jul. 20, 2023 USD ($)	May 05, 2023 USD ($)	May 03, 2023	May 01, 2023 USD ($)	Jan. 01, 2023	Jun. 04, 2021 USD ($)	May 21, 2021 USD ($)	Dec. 27, 2019 USD ($) Derivative	Dec. 31, 2019 USD ($) Subsidiary	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) $ / shares	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Nov. 23, 2022	Aug. 01, 2022	Oct. 06, 2021 USD ($)
Debt Instrument [Line Items]
Maturity date description													the Basis Term Loan (as defined below) had an outstanding principal balance of $66.9 million as of June 30, 2023 and matures on January 1, 2024, subject to the remaining one-year extension option that is subject to certain conditions, including a material adverse change clause, and approval by the lender.
Long-term debt outstanding											$ 254,396		$ 254,396
Interest expense											4,735	$ 2,685	9,516	$ 5,273
Balance outstanding											254,396		254,396
Principal balance of mortgage loan											252,581		252,581		$ 267,616
Income (expenses) related to fair value adjustments on derivatives											(300)	800	(300)	2,600
Net (loss) gain on fair value change of debt held under the fair value option											(1,131)	0	2,104	0
Change in fair value due to credit risk on debt held under the fair value option											$ (1,332)	$ 0	400	$ 0
Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Principal balance of mortgage loan			$ 8,700
Mortgages [Member]
Debt Instrument [Line Items]
Outstanding mortgage indebtedness													$ 171,300		180,300
Mortgage Loan [Member] | Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period			2028-05
Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate											12.00%		12.00%
Fair value of loans											$ 15,900		$ 15,900		17,900
Debt Instrument, common stock conversion price | $ / shares											$ 2.00		$ 2.00
Interest expense											$ 400		$ 900
Principal balance of mortgage loan											$ 15,000		$ 15,000
Long term debt maturity date											Dec. 01, 2027		Dec. 01, 2027
Net (loss) gain on fair value change of debt held under the fair value option											$ 1,100		$ 2,100
Change in fair value due to credit risk on debt held under the fair value option											1,300		400
Capitalized interest											$ 200		$ 500
LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate													5.22%
SOFR [Member] | Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Debt instrument variable rate			2.50%
Current Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate											5.00%		5.00%
Capitalized Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate											7.00%		7.00%
Debt Instrument, interest rate increase each year													1.00%
Interest Rate Cap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of derivative assets											$ 200		$ 200		200
Interest Rate Swap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of derivative assets											1,500		1,500		3,200
Interest Rate Swap [Member] | Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate			6.085%
Interest Rate Swap [Member] | Mortgage Loan [Member] | Highlandtown Village Shopping Center [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate			6.085%
Basis Term Loan [Member]
Debt Instrument [Line Items]
Number of subsidiaries as borrowers entered in loan agreement | Subsidiary										6
Mortgage loans											$ 66,900		$ 66,900
Maturity date													Jan. 01, 2024
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	[1]										8.62%		8.62%
Long-term debt outstanding											$ 66,900		$ 66,900
Balance outstanding											66,900		66,900
Debt instrument net of discount											$ 38		$ 38		$ 79
Debt instrument, effective interest rate											8.62%		8.62%
Basis Term Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of secured debt		$ 17,400
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%		8.62%		6.125%
Basis Term Loan [Member] | Interest Rate Cap [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate											3.50%		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%		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]
Description on extended redemption date													September 30, 2024 and September 30, 2025
Payment fee percentage, first extension option													0.25%
Payment fee percentage, second extension option													0.50%
Preferred Investor payments, description													Additionally, at the Lamont Street Redemption Date, Lamont Street was entitled to (i) a redemption fee of 0.50% of the capital contributions returned and (ii) an amount equal to (a) the product of (i) the aggregate amount of capital contributions made and (ii) 0.26 less (b) the aggregate amount of Lamont Street Class A Return payments made to Lamont Street (the “Lamont Street Minimum Multiple Amount”).
Percentage of redemption fee of capital contribution returned													0.50%
Repayments of secured debt													$ 2,300
Lamont Street Preferred Interest [Member] | Class A Units [Member]
Debt Instrument [Line Items]
Annual return percentage on initial capital contribution													13.50%
Cumulative annual return percentage, paid current													10.00%
Cumulative annual return percentage, accrued													3.50%
Lamont Street Preferred Interest [Member] | Class A Units [Member] | Highlandtown [Member]
Debt Instrument [Line Items]
Preferred investor, capital contribution								$ 3,900
Interest percentage in exchange of capital contribution								1.00%
Lamont Street Preferred Interest [Member] | Class A Units [Member] | Spotswood [Member]
Debt Instrument [Line Items]
Preferred investor, capital contribution							$ 3,900
Interest percentage in exchange of capital contribution							1.00%
Greenwood Village [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period													2028-10
Mortgage loan secured by the property																		$ 23,500
Debt instrument, effective interest rate					5.85%
Greenwood Village [Member] | Prime Rate [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																		0.35%
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] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate					5.85%
Amount recieved on termination					$ 2,200
Interest Rate																		4.082%
Greenwood Village [Member] | Interest Rate Swap [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Debt instrument, effective interest rate																		4.082%
Highlandtown Mortgage [Member]
Debt Instrument [Line Items]
Repayments of secured debt			$ 1,900
Vista Shops at Golden Mile Loan [Member]
Debt Instrument [Line Items]
Maturity date	[2]												Jun. 24, 2024
Debt instrument variable rate	[1],[2]										3.83%		3.83%
Debt instrument net of discount											$ 0		$ 0		$ 12
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
Balance outstanding									$ 10,200
Number of derivatives held | Derivative									2

[1] At June 30, 2023, the floating rate loans tied to the London Inter-Bank Offered Rate (“LIBOR”) were based on the one-month LIBOR rate of 5.22%. Beginning July 1, 2023, one-month LIBOR is no longer published and all remaining debt referencing LIBOR was replaced with SOFR (as defined below).

[2] On June 28, 2023, the Company entered into an agreement to extend the maturity date of this loan to June 24, 2024.