Note 5 - Debt - (Details Textual)									1 Months Ended			3 Months Ended			12 Months Ended
		Sep. 30, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 18, 2021 USD ($)	Jul. 02, 2020 USD ($)	Jun. 16, 2020 USD ($) Capital	Apr. 20, 2020 USD ($)	Dec. 27, 2019 USD ($) Subsidiary Derivative	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)		Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)		Apr. 30, 2020 USD ($)
Debt Instrument [Line Items]
Preferred investor approval rights, Minimum amount of capital expenditure to be incurred												$ 250,000
Preferred investor, additional capital contribution, treated as debt											$ 2,900,000
Preferred units, cumulative annual return											13.00%
Repayment of debt												2,887,000		$ 73,000
Deferred financing costs, gross												1,300,000			$ 1,300,000
Deferred financing costs, net												1,200,000			1,300,000
Debt discounts, gross												1,400,000			1,300,000
Debt instrument net of discount												1,200,000			$ 1,300,000
Expenses related to fair value adjustments on derivatives												600,000		0
COVID-19 [Member]
Debt Instrument [Line Items]
Gains (losses) on modification of loan												$ 0
Gain loss on modification of loan description												No gain or loss was recognized as the carrying amount of the original loans were not greater than the undiscounted cash flows of the modified loans.
Repayment of debt												$ 250,000
2020 Real Estate Acquisitions [Member] | Lamar Station Plaza East [Member] | Loan Agreement [Member]
Debt Instrument [Line Items]
Debt instrument payment terms												The loan was in default of the debt service coverage ratio (as defined in the loan agreement) upon the Company’s assumption of the loan agreement.
Subsequent Event [Member]
Debt Instrument [Line Items]
PPP loan, interest rate							1.00%
Subsequent Event [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Repayment of debt			$ 250,000
Subsequent Event [Member] | Lamar Station Plaza East [Member]
Debt Instrument [Line Items]
Long-term debt amount			3,400,000						$ 3,400,000
Subsequent Event [Member] | 2020 Real Estate Acquisitions [Member] | Lamar Station Plaza East [Member]
Debt Instrument [Line Items]
Assumption of debt					$ 2,500,000
Subsequent Event [Member] | 2020 Real Estate Acquisitions [Member] | Lamar Station Plaza East [Member] | Loan Agreement [Member]
Debt Instrument [Line Items]
Maximum principal amount					$ 4,100,000
MVB Revolver [Member]
Debt Instrument [Line Items]
Maturity Date	[1]											Dec. 27, 2021			Dec. 27, 2021
Interest Rate	[2]											6.75%			6.75%
MVB Revolver [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Long-term debt outstanding												$ 2,000
MVB Term Loan [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Maturity Date												Dec. 27, 2022
Mortgages [Member]
Debt Instrument [Line Items]
Outstanding mortgage indebtedness												$ 33,400,000			$ 32,100,000
PPP Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Unsecured loan							$ 800,000
PPP Loan [Member] | Subsequent Event [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Unsecured loan			800,000						800,000								$ 800,000
Second PPP Loan [Member]
Debt Instrument [Line Items]
Maturity Date												Mar. 18, 2026
Second PPP Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Unsecured loan				$ 800,000
PPP loan, interest rate				1.00%
Sub-OP [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Number of additional capital contribution from preferred investor | Capital						2
Preferred investor, additional capital contribution, treated as debt						$ 2,900,000
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate												0.99%
Prime Rate [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Debt instrument variable rate												1.50%
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Fair value of interest rate swap liability												$ 800,000			100,000
Interest Rate Swap [Member] | Accounts Payable and Accrued Expenses [Member]
Debt Instrument [Line Items]
Fair value of interest rate swap liability												800,000			100,000
Maximum [Member]
Debt Instrument [Line Items]
Deferred financing costs, amortization expense												$ 200,000		$ 0
Maximum [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Deferred principal and interest payments, period												6 months
Maximum [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets												$ 100,000			100,000
Maximum [Member] | Interest Rate Cap [Member] | Other Assets, Net [Member]
Debt Instrument [Line Items]
Fair value of interest rate cap assets												$ 100,000			$ 100,000
Minimum [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Deferred principal and interest payments, period												3 months
Basis Term Loan [Member]
Debt Instrument [Line Items]
Number of subsidiaries as borrowers entered in loan agreement | Subsidiary								6
Long-term debt outstanding												$ 63,800,000
Maturity Date								Jan. 01, 2023				Jan. 01, 2023			Jan. 01, 2023
Maturity date description												The Basis Term Loan matures on January 1, 2023, subject to two one-year extension options, subject to certain conditions.
Interest Rate								6.125%				6.125%	[2]		6.125%	[2]
Preferred investor, additional capital contribution, treated as debt												$ 2,900,000
Debt instrument net of discount												1,025,000			$ 1,118,000
Basis Term Loan [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred units remaining contributed capital												$ 1,200,000
Basis Term Loan [Member] | Sub-OP [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution, treated as debt						2,400,000
Basis Term Loan [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate								3.85%				3.85%
Basis Term Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Long-term debt amount								$ 66,900,000
Debt instrument variable rate								6.125%
Basis Term Loan [Member] | Interest Rate Cap [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate								3.85%				3.50%
Derivative variable rate								3.50%
Debt instrument, effective interest rate								3.50%
Basis Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Long-term debt amount								$ 66,900,000
Basis Preferred Interest [Member]
Debt Instrument [Line Items]
Maturity Date	[3],[4]											Jan. 01, 2023			Jan. 01, 2023
Interest Rate	[2],[4],[5]											14.00%			14.00%
Preferred investor, capital contribution												$ 6,900,000
Debt instrument net of discount												$ 206,000			$ 224,000
Basis Preferred Interest [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred investor investment commitment amount								$ 10,700,000
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 is 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”).
Basis Preferred Interest [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												$ 2,500,000			2,800,000
Basis Preferred Interest Minimum Multiple Amount [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Long-term debt outstanding												2,500,000			$ 2,800,000
MVB Loan Agreement [Member]
Debt Instrument [Line Items]
Long-term debt outstanding								6,500,000
Loan agreement deposit requirement												$ 3,000,000
Loan agreement deposit requirement default interest charges percentage												1.00%
MVB Loan Agreement [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Long-term debt outstanding								$ 2,000,000
Maturity Date								Dec. 27, 2020				Dec. 27, 2022
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%
Line of credit facility, frequency of payments												require monthly principal payments as calculated over a 10-year amortization schedule
MVB Loan Agreement [Member] | MVB Term Loan [Member] | Scenario Forecast [Member]
Debt Instrument [Line Items]
Line of credit facility, periodic payment required		$ 250,000
MVB Loan Agreement [Member] | MVB Term Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Funds available under other lines of credit										$ 3,000,000
Line of credit facility, periodic payment required			$ 250,000							$ 250,000
Line of credit facility, amortization period			10 years							10 years
MVB Loan Agreement [Member] | Prime Rate [Member] | MVB Revolver [Member]
Debt Instrument [Line Items]
Debt instrument variable rate								1.50%
MVB Loan Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio												1.30%
MVB Loan Agreement [Member] | Maximum [Member] | MVB Term Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt service coverage ratio										1.00%
MVB Loan Agreement [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio												1.00%
Consolidated funded debt ratio												8.00%
Funds available under other lines of credit												$ 5,000,000
MVB Loan Agreement [Member] | Minimum [Member] | MVB Term Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Debt service coverage ratio										1.00%
Hollinswood Loan [Member]
Debt Instrument [Line Items]
Maturity date description												The deferred amounts for the Hollinswood mortgage loan are due in six equal monthly installments beginning in November 2020.
Hollinswood Loan [Member] | COVID-19 [Member]
Debt Instrument [Line Items]
Maturity date description												The deferred amount for the Hollinswood mortgage is due in six equal monthly installments beginning November 2020.
Hollinswood Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio												1.40%
Hollinswood Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio															1.00%
Vista Mortgage [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio												1.35%
Vista Mortgage [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio															1.00%
Brookhill Mortgage [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio												1.35%
Brookhill Mortgage [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt service coverage ratio															1.00%
Other Capital Contribution [Member] | Sub-OP [Member]
Debt Instrument [Line Items]
Preferred units remaining contributed capital												$ 1,200,000
Other Capital Contribution [Member] | Sub-OP [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Preferred investor, additional capital contribution, treated as debt						$ 500,000
Preferred units, cumulative annual return						13.00%
2021 Debt Agreements and Modifications [Member] | Vista Shops Mortgage Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Long-term debt amount			$ 8,900,000						$ 8,900,000
Maturity Date									Jun. 30, 2023
Interest Rate			3.83%						3.83%
Proceeds from refinance to repayment									$ 1,900,000
Maximum principal amount			$ 11,700,000						11,700,000
Escrow Deposit			$ 900,000						900,000
2021 Debt Agreements and Modifications [Member] | Vista Shops Mortgage Loan [Member] | Subsequent Event [Member] | Forbearance Agreements and Debt Amendments [Member]
Debt Instrument [Line Items]
Repayment of debt									800,000
2021 Debt Agreements and Modifications [Member] | Vista Shops Mortgage Loan [Member] | Subsequent Event [Member] | Accrued Interest [Member]
Debt Instrument [Line Items]
Repayment of debt									$ 200,000
2021 Debt Agreements and Modifications [Member] | Sub-OP [Member] | Vista Shops Mortgage Loan [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Proceeds from refinance to repayment						$ 800,000
Hollinswood Loan [Member]
Debt Instrument [Line Items]
Maturity Date												Dec. 01, 2024			Dec. 01, 2024
Interest Rate	[2]											4.06%			4.06%
Hollinswood Loan [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate												2.25%			2.25%
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
Number of derivatives held | Derivative								2
Debt instrument additional borrowing available								$ 3,000,000

[1] In March 2021, the Company entered into a one-year extension on the MVB Revolver as described below under the heading “—Forbearance Agreements and Debt Amendments”.

[2] For floating rate loans tied to LIBOR, based on the one-month LIBOR rate of 0.99%, as of March 31, 2020.

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

[4] The outstanding balance includes approximately $2.5 million and $2.8 million of indebtedness as of March 31, 2020 and December 31, 2019, 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 “—Forbearance Agreements and Debt Amendments”. The Preferred Investor is entitled to a cumulative annual return of 13.0% on the additional contributions.