Note 6 - Mortgage and Other Indebtedness (Details Textual)										1 Months Ended					3 Months Ended		12 Months Ended
		Dec. 22, 2022 USD ($)	Dec. 09, 2022 USD ($)	Nov. 23, 2022 USD ($)	Mar. 22, 2022 USD ($)	Jun. 04, 2021 USD ($)	May 21, 2021 USD ($)	Jun. 16, 2020 USD ($) Capital	Dec. 27, 2019 USD ($) Derivative	Nov. 30, 2022 USD ($)	Jul. 31, 2021	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($) Subsidiary	Oct. 17, 2022	Jun. 30, 2021 USD ($)	Dec. 31, 2022 USD ($) $ / shares		Dec. 31, 2021 USD ($)	Nov. 22, 2022 USD ($)	Aug. 01, 2022	Mar. 31, 2022	Oct. 06, 2021 USD ($)	Oct. 01, 2021 USD ($)	Sep. 30, 2021	Mar. 18, 2021 USD ($)	Apr. 20, 2020 USD ($)
Debt Instrument [Line Items]
Long-term debt outstanding																	$ 267,152,000
Maturity date description																	the Basis Term Loan (as defined below), has an outstanding balance of $66.9 million 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.
Interest expense																	$ 12,710,000		$ 9,961,000
Debt principal amount																	267,616,000		178,982,000
Deferred financing costs, gross																	3,200,000		2,100,000
Deferred financing costs, net																	1,900,000		1,100,000
Debt discounts, gross																	2,100,000		2,100,000
Debt instrument net of discount																	400,000		1,000,000.0
Deferred financing costs, amortization expense																	1,500,000		1,300,000
Income (expenses) related to fair value adjustments on derivatives																	3,400,000		400,000
Net loss on fair value change on debt held under the fair value option																	(3,151,000)		0
Change in fair value due to credit risk on debt held under the fair value option																	$ 56,000		0
MVB Revolver [Member]
Debt Instrument [Line Items]
Maturity date	[1]																Jun. 27, 2023
Interest Rate																	7.75%
MVB and Second MVB Term Loan [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Repayment of Long Term Debt				$ 6,800,000
Mortgage Loan [Member]
Debt Instrument [Line Items]
Mortgage loan maturity period																	2028-10
Debt principal amount										$ 76,000,000.0
Mortgage loan secured by the property																							$ 23,500,000
Mortgage Loan [Member] | Midtown Row [Member]
Debt Instrument [Line Items]
Interest Rate										6.48%
Mortgage loan maturity period										2027-12
Mezzanine Loan [Member]
Debt Instrument [Line Items]
Fair value of loans																	$ 17,895,000		0
Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Interest Rate																	12.00%
Interest expense																	$ 200,000
Capitalized interest																	$ 100,000
Long term debt maturity date																	Dec. 01, 2027
Debt principal amount																	$ 15,000,000.0
Debt Instrument, common stock conversion price | $ / shares																	$ 2.00
Fair value of loans																	$ 17,900,000			$ 14,700,000
Net loss on fair value change on debt held under the fair value option																	3,100,000
Change in fair value due to credit risk on debt held under the fair value option																	100,000
Mortgages [Member]
Debt Instrument [Line Items]
Outstanding mortgage indebtedness																	$ 180,300,000		94,900,000
Sub-OP [Member]
Debt Instrument [Line Items]
Number of additional capital contribution from preferred investor | Capital								2
Preferred investor, additional capital contribution								$ 2,900,000					$ 2,900,000
Proceeds from refinance to repayment								(750,000)
Preferred Units Available Contributed Capital								300,000																$ 1,000,000.0
LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																	4.39%
Prime Rate [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																	1.50%
Prime Rate [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Interest Rate																							0.35%
Current Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Interest Rate																	5.00%
Capitalized Interest Rate [Member] | Fortress Mezzanine Loan [Member]
Debt Instrument [Line Items]
Interest Rate																	7.00%
Debt Instrument, interest rate increase each year																	1.00%
Interest Rate Cap [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets																	$ 3,400,000
Interest Rate Cap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets																	200,000
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Fair value of interest rate swap liability																			400,000
Interest Rate Swap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets																	$ 3,200,000
Fair value of interest rate swap liability																			400,000
Interest Rate Swap [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Interest Rate																							4.082%
Maximum [Member] | Interest Rate Cap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets																			100,000
Minimum [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Interest Rate																	6.75%
Basis Term Loan [Member]
Debt Instrument [Line Items]
Number of subsidiaries as borrowers entered in loan agreement | Subsidiary														6
Balance outstanding																	$ 66,900,000
Long-term debt outstanding																	$ 66,900,000
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.
Interest Rate																	6.125%
Interest Rate														6.125%
Debt instrument net of discount																	$ 79,000		$ 373,000
Basis Term Loan [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution								2,400,000
Basis Term Loan [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																	3.97%
Basis Term Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Balance outstanding									$ 66,900,000
Debt instrument variable rate									6.125%								6.125%		6.125%
Basis Term Loan [Member] | Interest Rate Cap [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Derivative variable rate																	3.50%
Debt instrument, effective interest rate									3.50%
Basis Term Loan [Member] | Interest Rate Cap [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate				4.65%					3.97%
Interest Rate																					3.50%
Derivative variable rate																					3.50%
Debt instrument, effective interest rate				4.65%
Basis Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Balance outstanding														$ 66,900,000
Basis Preferred Interest [Member]
Debt Instrument [Line Items]
Maturity date	[2],[3]																Jan. 01, 2023
Interest Rate	[3],[4]																14.00%
Repayment of Long Term Debt				$ 8,500,000
Debt instrument net of discount																	$ 0		$ 75,000
Basis Preferred Interest [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Long-term debt outstanding																			800,000
Preferred investor investment commitment amount														10,700,000
Preferred investor, capital contribution														$ 6,900,000
Annual return percentage on initial capital contribution														14.00%
Interest percentage on excess of commitment amount														20.00%
Description on extended redemption date																	December 31, 2023 and December 31, 2024
Payment fee percentage, first extension option														0.25%
Payment fee percentage, second extension option														0.50%
Preferred Investor payments, description																	Additionally, at the Redemption Date, the Preferred Investor was entitled to an amount equal to (a) the product of (i) the aggregate amount of capital contributions made and (ii) 0.4, less (b) the aggregate amount of Class A Return payments made to the Preferred Investor (the “Minimum Multiple Amount”). As of December 31, 2021, the Minimum Multiple Amount was approximately $0.8 million, which is included as indebtedness on the consolidated balance sheets.
Basis Preferred Interest [Member] | Sub-OP [Member] | Class A Units [Member]
Debt Instrument [Line Items]
Interest percentage in exchange of capital contribution														1.00%
Basis Preferred Interest [Member] | Maximum [Member]
Debt Instrument [Line Items]
Preferred investor investment commitment amount														$ 10,700,000
Basis Preferred Interest Minimum Multiple Amount [Member]
Debt Instrument [Line Items]
Long-term debt outstanding																			$ 800,000
Other Capital Contribution [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution								$ 500,000
Preferred units, cumulative annual return								13.00%					13.00%
MVB Loan Agreement [Member]
Debt Instrument [Line Items]
Long-term debt outstanding														6,500,000
MVB Loan Agreement [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Long-term debt outstanding														$ 2,000,000.0
Maturity date														Dec. 27, 2020
Interest Rate														6.75%
MVB Loan Agreement [Member] | MVB Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt outstanding														$ 4,500,000
Maturity date														Dec. 27, 2022
Interest Rate														6.75%
MVB Loan Agreement [Member] | PPP Loan [Member]
Debt Instrument [Line Items]
Unsecured loan																											$ 800,000
MVB Loan Agreement [Member] | Second PPP Loan [Member]
Debt Instrument [Line Items]
Unsecured loan																										$ 800,000
MVB Loan Agreement [Member] | Prime Rate [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Debt instrument variable rate														1.50%
MVB Amendments [Member] | Second MVB Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt outstanding					$ 2,000,000.0
Maturity date					Jun. 27, 2023
Lamont Street Preferred Interest [Member]
Debt Instrument [Line Items]
Long-term debt outstanding																	$ 300,000
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%
Percentage of redemption fee of capital contribution returned																	0.50%
Preferred Investor payments, description																	Additionally, at the Lamont Street Redemption Date, Lamont Street is 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").
Interest expense																$ 1,000,000.0
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							$ 3,900,000
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						$ 3,900,000
Interest percentage in exchange of capital contribution						1.00%
Lamont Street Preferred Interest [Member] | Minimum [Member] | Highlandtown [Member]
Debt Instrument [Line Items]
Preferred investor approval rights, Minimum amount of capital expenditure to be incurred																	$ 100,000
Lamont Street Preferred Interest [Member] | Minimum [Member] | Spotswood [Member]
Debt Instrument [Line Items]
Preferred investor approval rights, Minimum amount of capital expenditure to be incurred																	$ 100,000
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									$ 10,200,000
Debt instrument additional borrowing available									$ 3,000,000.0
Number of derivatives held | Derivative									2
Lamar Station Plaza East [Member]
Debt Instrument [Line Items]
Maturity date											Jul. 31, 2022				Oct. 17, 2022
Lamar Station Plaza East [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio																			1.15%			1.25%			1.05%
Lamar Station Plaza East [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio																			1.00%			1.00%			1.00%
Lamar Station Plaza West [Member]
Debt Instrument [Line Items]
Interest Rate			5.67%
Mortgage loan maturity period			2027-12
Debt principal amount			$ 19,000,000.0
Loan funded at closing			$ 18,400,000
Vista Shops at Golden Mile Loan [Member]
Debt Instrument [Line Items]
Maturity date	[5]																Jun. 24, 2023
Interest Rate												3.83%					3.83%	[5]
Mortgage loan maturity period												2023-06
Debt principal amount												$ 11,700,000					$ 11,500,000
Payment of basis preferred interest												$ 1,900,000
Payment of accrued interest																46,000
Payment to escrow account																1,100,000
Debt instrument net of discount																	$ 12,000		$ 39,000
Vista Shops at Golden Mile Loan [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Maturity date																	Jan. 25, 2021
Vista Shops at Golden Mile Loan [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Payment of basis preferred interest																$ 750,000
Vista Shops at Golden Mile Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																	2.50%
Lamar Station Plaza East Loan [Member]
Debt Instrument [Line Items]
Maturity date															Oct. 17, 2022		Oct. 17, 2022	[6]
Interest Rate																	6.14%
Debt instrument net of discount																	$ 0		8,000
Lamar Station Plaza East Loan [Member] | SOFR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate														3.97%
Cromwell Field Shopping Center Loan [Member]
Debt Instrument [Line Items]
Maturity date	[7]																Dec. 22, 2027
Interest Rate		6.71%															6.71%
Mortgage loan maturity period		2027-12
Debt principal amount		$ 15,000,000.0
Loan funded at closing		$ 10,200,000
Debt instrument net of discount																	$ 77,000		$ 144,000
Cromwell Field Shopping Center Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																	5.40%
Cromwell Field Shopping Center Loan [Member] | Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate																	0.50%
Greenwood Village [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest Rate																							4.082%
Debt instrument, effective interest rate																	4.082%

[1] In March 2022, the Company entered into a six-month extension on the MVB Term Loan and the MVB Revolver (each as defined below) as described under the heading "—MVB Loans." The Company repaid the MVB Term Loan and MVB Revolver on November 23, 2022 with proceeds from the Preferred Equity Investment.

[2] If the Basis Term Loan was paid in full earlier than its maturity date, the Basis Preferred Interest in the Sub-OP (as defined below) would have matured at that time.

[3] The outstanding balance included approximately $0.8 million of indebtedness as of December 31, 2021 related to the Minimum Multiple Amount (as defined below) owed to the Preferred Investor as described below under the heading “—Basis Preferred Interest.” The Basis Preferred Interest was repaid on November 23, 2022 with proceeds from the Preferred Equity Investment.

[4] In June 2020, the Preferred Investor made additional capital contributions of approximately $2.9 million as described below under the heading “—Basis Preferred Interest” of which approximately $0.9 million was outstanding at December 31, 2021. The Preferred Investor was entitled to a cumulative annual return of 13.0% on the additional contributions.

[5] The Company completed the refinance of this loan in March 2021 as described below under the heading “—Mortgage Indebtedness.” The prior loan matured on January 25, 2021 and carried an interest rate of LIBOR plus 2.5% per annum.

[6] In August 2022, the Company entered into a modification to the Lamar Station Plaza East loan to extend the maturity date to October 17, 2022, effective July 17, 2022, as described below under the heading "—Mortgage Indebtedness". The Lamar Station Plaza East loan was repaid on November 23, 2022 with proceeds from the Preferred Equity Investment.

[7] On November 9, 2022, the Company entered into a modification to the Cromwell Field Shopping Center mortgage and mezzanine loans to extend the maturity dates to December 31, 2022. In December 2022, the Company refinanced the Cromwell Field Shopping Center mortgage.