Note 6 - Mortgage and Other Indebtedness - Schedule of Debt Balance (Parenthetical) (Details) - USD ($) $ in Thousands				1 Months Ended	12 Months Ended
		Jun. 16, 2020	Dec. 27, 2019	Jul. 31, 2021	Dec. 31, 2021		Dec. 31, 2019	Oct. 06, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020
Debt Instrument [Line Items]
Debt instrument net of discount					$ 1,000					$ 900
Balance outstanding					$ 181,075
MVB Revolver [Member]
Debt Instrument [Line Items]
Interest Rate	[1]				6.75%
Maturity date	[2]				Dec. 27, 2022
Sub-OP [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution		$ 2,900									$ 2,900
Preferred Units Contributed Capital Outstanding					$ 900
LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					0.10%
Prime Rate [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					1.50%
Interest Rate Swap [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Interest Rate					4.06%
Mortgage Loan [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Interest Rate								0.35%
Mortgage Loan [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest Rate								4.082%
Basis Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 373					$ 745
Interest Rate	[1]				6.125%
Interest Rate					6.125%		6.125%			6.125%
Maturity date					Jan. 01, 2023
Balance outstanding					$ 66,900
Basis Term Loan [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution		2,400
Basis Term Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					3.85%		3.85%
Basis Term Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate			6.125%
Basis Term Loan [Member] | Interest Rate Cap [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate			3.85%		3.50%
Basis Preferred Interest [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 75					$ 150
Interest Rate	[1],[3],[4]				14.00%
Maturity date	[4],[5]				Jan. 01, 2023
Vista Shops at Golden Mile Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 39					0
Interest Rate	[1],[6]				3.83%
Interest Rate									3.83%
Maturity date	[6]				Jun. 24, 2023
Vista Shops at Golden Mile Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					2.50%
Vista Shops at Golden Mile Loan [Member] | Mortgage Loan [Member]
Debt Instrument [Line Items]
Maturity date					Jan. 25, 2021
Lamar Station Plaza East Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 8					7
Interest Rate	[1]				4.00%
Maturity date				Jul. 31, 2022	Jul. 17, 2022	[7]
Lamar Station Plaza East Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					3.00%
Lamar Station Plaza East Loan [Member] | LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					1.00%
Cromwell Field Land Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 0					10
Interest Rate	[1],[8]				6.75%
Maturity date	[8]				Jan. 10, 2023
Lamont Street Preferred Interest [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 67					0
Interest Rate	[1],[9]				13.50%
Maturity date	[9]				Sep. 30, 2023
Highlandtown Village Shopping Center Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 46					0
Interest Rate	[1]				4.13%
Maturity date					May 06, 2023
Cromwell Field Shopping Center Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 144					0
Interest Rate	[1]				5.90%
Maturity date					Nov. 15, 2022
Cromwell Field Shopping Center Loan [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					5.40%
Cromwell Field Shopping Center Loan [Member] | LIBOR [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt instrument variable rate					0.50%
Cromwell Field Shopping Center Mezzanine Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 18					0
Interest Rate	[1]				10.00%
Maturity date					Nov. 15, 2022
Spotswood Valley Square Shopping Center Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 94					0
Interest Rate	[1]				4.82%
Maturity date					Jul. 06, 2023
The Shops at Greenwood Village [Member]
Debt Instrument [Line Items]
Debt instrument net of discount					$ 114					0
Interest Rate	[1]				4.08%
Maturity date					Oct. 10, 2028
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]
Balance outstanding			$ 10,200
Brookhill Azalea Shopping Center Loan [Member]
Debt Instrument [Line Items]
Interest Rate	[1]				2.85%
Maturity date					Jan. 31, 2025
Basis Preferred Interest Minimum Multiple Amount [Member]
Debt Instrument [Line Items]
Balance outstanding					$ 800					$ 1,800
Other Capital Contribution [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution		$ 500
Preferred units, cumulative annual return		13.00%			13.00%
Lamont Street Minimum Multiple Amount [Member]
Debt Instrument [Line Items]
Balance outstanding					$ 600
Greenwood Village [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Interest Rate					4.082%			4.082%

[1] At December 31, 2021, the floating rate loans tied to LIBOR were based on the one-month LIBOR rate of 0.1%.

[2] In March 2022, the Company entered into a six-month extension on the MVB Term Loan and MVB Revolver (each as defined below) as described under the heading "—MVB Loans."

[3] 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 $0.9 million was outstanding at December 31, 2021. The Preferred Investor is entitled to a cumulative annual return of 13.0% on the additional contributions.

[4] The outstanding balance includes approximately $0.8 million and $1.8 million of indebtedness as of December 31, 2021 and 2020, respectively, related to the Multiple Minimum Amount owed to the Preferred Investor as described below under the heading “—Basis Preferred Interest.”

[5] If the Basis Term Loan is paid in full earlier than its maturity date, the Basis Preferred Interest in the Sub-OP (as defined below) will mature at that time.

[6] 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.

[7] In July 2021, the Company entered into a modification to the Lamar Station Plaza East loan to extend the maturity date to July 2022 as described below under the heading "—Mortgage Indebtedness".

[8] The Company paid off the remaining principal balance of the Cromwell land loan during the second quarter of 2021.

[9] The outstanding balance includes approximately $0.6 million of indebtedness as of December 31, 2021, related to the Lamont Street Minimum Multiple Amount owed to Lamont Street as described below under the heading "—Lamont Street Preferred Interest."