Note 5 - Debt - Schedule of Debt Balance (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		12 Months Ended
		Dec. 31, 2019	Mar. 31, 2021		Dec. 31, 2020
Debt Instrument [Line Items]
Balance outstanding			$ 126,107		$ 122,977
Unamortized deferred financing costs			(1,070)		(917)
Total Mortgage and Other Indebtedness			$ 125,037		$ 122,060
Basis Term Loan [Member]
Debt Instrument [Line Items]
Maturity date		Jan. 01, 2023	Jan. 01, 2023		Jan. 01, 2023
Rate Type	[1]		Floating		Floating
Interest Rate		6.125%	6.125%	[2]	6.125%	[2]
Balance outstanding			$ 66,532		$ 66,439
Basis Preferred Interest [Member]
Debt Instrument [Line Items]
Maturity date	[3],[4]		Jan. 01, 2023		Jan. 01, 2023
Rate Type	[4]		Fixed		Fixed
Interest Rate	[2],[4],[5]		14.00%		14.00%
Balance outstanding	[4]		$ 11,211		$ 11,434
MVB Term Loan [Member]
Debt Instrument [Line Items]
Maturity date			Dec. 27, 2022		Dec. 27, 2022
Rate Type			Fixed		Fixed
Interest Rate	[2]		6.75%		6.75%
Balance outstanding			$ 4,193		$ 4,277
Hollinswood Loan [Member]
Debt Instrument [Line Items]
Maturity date			Dec. 01, 2024		Dec. 01, 2024
Rate Type	[6]		LIBOR + 2.25%		LIBOR + 2.25%
Interest Rate	[2]		4.06%		4.06%
Balance outstanding			$ 12,619		$ 11,670
Avondale Shops Loan [Member]
Debt Instrument [Line Items]
Maturity date			Jun. 01, 2025		Jun. 01, 2025
Rate Type			Fixed		Fixed
Interest Rate	[2]		4.00%		4.00%
Balance outstanding			$ 3,179		$ 3,205
Vista Shops at Golden Mile Loan [Member]
Debt Instrument [Line Items]
Maturity date			Jun. 24, 2023		Jun. 24, 2023
Rate Type			Fixed		Fixed
Interest Rate	[2]		3.83%		3.83%
Balance outstanding			$ 11,617		$ 8,902
Total Mortgage and Other Indebtedness			$ 11,700
Brookhill Azalea Shopping Center Loan [Member]
Debt Instrument [Line Items]
Maturity date			Jan. 31, 2025		Jan. 31, 2025
Rate Type			LIBOR + 2.75%		LIBOR + 2.75%
Interest Rate	[2]		2.86%		2.86%
Balance outstanding			$ 9,329		$ 9,432
Lamar Station Plaza East Loan [Member]
Debt Instrument [Line Items]
Maturity date			Jul. 17, 2021		Jul. 17, 2021
Rate Type	[7]		LIBOR + 3.00%		LIBOR + 3.00%
Interest Rate	[2]		4.00%		4.00%
Balance outstanding			$ 3,497		$ 3,446
Cromwell Land Loan [Member]
Debt Instrument [Line Items]
Maturity date			Jan. 10, 2023		Jan. 10, 2023
Rate Type			Fixed		Fixed
Interest Rate	[2]		6.75%		6.75%
Balance outstanding			$ 1,411		$ 1,415
First Paycheck Protection Program Loan [Member]
Debt Instrument [Line Items]
Maturity date	[8]		Apr. 20, 2022		Apr. 20, 2022
Rate Type			Fixed		Fixed
Interest Rate	[2]		1.00%		1.00%
Balance outstanding					$ 757
Second Paycheck Protection Program Loan [Member]
Debt Instrument [Line Items]
Maturity date			Mar. 18, 2026		Mar. 18, 2026
Rate Type			Fixed		Fixed
Interest Rate	[2]		1.00%		1.00%
Balance outstanding			$ 769
MVB Revolver [Member]
Debt Instrument [Line Items]
Maturity date			Dec. 27, 2021		Dec. 27, 2021
Rate Type	[9]		Floating		Floating
Interest Rate	[2]		6.75%		6.75%
Balance outstanding			$ 1,750		$ 2,000

[1] The interest rate for the Basis Term Loan is the greater of (i) LIBOR plus 3.850% per annum and (ii) 6.125% per annum. The Company has entered into an interest rate cap that caps the LIBOR rate on this loan at 3.5%.

[2] For floating rate loans tied to LIBOR, based on the one-month LIBOR rate of 0.11%, as of March 31, 2021.

[3] 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.

[4] The outstanding balance includes approximately $1.5 million and $1.8 million of indebtedness as of March 31, 2021 and December 31, 2020, respectively, related to the Multiple Minimum Amount owed to the Preferred Investor as described below under the heading “—Basis Preferred Interest”.

[5] In June 2020, the Preferred Investor made additional capital contributions of approximately $2.9 million as described below under the heading “—Basis Preferred Interest”. The Preferred Investor is entitled to a cumulative annual return of 13.0% on the additional contributions.

[6] The Company has entered into an interest rate swap which fixes the interest rate of the loan at 4.06%.

[7] The interest rate on the Lamar Station Plaza East Loan is LIBOR plus 3.00% per annum with a minimum LIBOR rate of 1.00%.

[8] During the first quarter of 2021, the Company received forgiveness for its first Paycheck Protection Program Loan as described below under the heading “—PPP Loans”.

[9] The interest rate on the MVB Revolver is the greater of (i) prime rate plus 1.5% and (ii) 6.75%.