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Note 1 - Organization and Nature of Business (Details Textual)				1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 01, 2020 USD ($)	Dec. 27, 2019 Merger	May 28, 2019 Merger Entity	Dec. 31, 2019 Merger	Mar. 31, 2021 USD ($) property Merger shares	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jul. 02, 2020 Merger	Apr. 30, 2020 USD ($)	Apr. 20, 2020 USD ($)
Real Estate Properties [Line Items]
Real estate investments					$ 186,300,000
Number of real estate properties \| property					11
Long-term debt outstanding					$ 126,986,000
Repayments of debt					9,372,000	$ 2,887,000
Remaining availability from preferred capital contributions					1,000,000
Mortgages with principal balances outstanding					$ 3,500,000
MVB Revolver [Member]
Real Estate Properties [Line Items]
Maturity date					Dec. 27, 2021		Dec. 27, 2021
Hollinswood Loan [Member]
Real Estate Properties [Line Items]
Maturity date					Dec. 01, 2024		Dec. 01, 2024
Vista Shops at Golden Mile Loan [Member]
Real Estate Properties [Line Items]
Maturity date					Jun. 24, 2023		Jun. 24, 2023
Brookhill Azalea Shopping Center Loan [Member]
Real Estate Properties [Line Items]
Maturity date					Jan. 31, 2025		Jan. 31, 2025
Avondale Shops Loan [Member]
Real Estate Properties [Line Items]
Maturity date					Jun. 01, 2025		Jun. 01, 2025
MVB Term Loan [Member]
Real Estate Properties [Line Items]
Maturity date					Dec. 27, 2022		Dec. 27, 2022
Basis Term Loan [Member]
Real Estate Properties [Line Items]
Maturity date description					The Basis Term Loan matures on January 1, 2023, subject to two one-year extension options, subject to certain conditions.
Long-term debt outstanding					$ 66,900,000
Maturity date				Jan. 01, 2023	Jan. 01, 2023		Jan. 01, 2023
Preferred investor, additional capital contribution, treated as debt					$ 2,900,000
PPP Loan [Member]
Real Estate Properties [Line Items]
Unsecured loan										$ 800,000
COVID-19 [Member]
Real Estate Properties [Line Items]
Number of mergers delayed in closing \| Merger					6
Event of default					has been unable to meet and anticipates being unable to meet certain debt covenants included in the Company’s loan agreements, and has certain debt maturities occurring within the next twelve months.
Deferred contractual revenue	$ 400,000
Deferred contractual revenue waived	$ 300,000
Repayments of debt					$ 250,000
Amortization schedule duration					10 years
COVID-19 [Member] \| MVB Revolver [Member]
Real Estate Properties [Line Items]
Long-term debt outstanding					$ 2,000
COVID-19 [Member] \| Hollinswood Loan [Member]
Real Estate Properties [Line Items]
Debt instrument term defer payments of principal and interest.							6 months
COVID-19 [Member] \| Vista Shops at Golden Mile Loan [Member]
Real Estate Properties [Line Items]
Debt instrument term defer payments of principal and interest.							6 months
COVID-19 [Member] \| Brookhill Azalea Shopping Center Loan [Member]
Real Estate Properties [Line Items]
Debt instrument term defer payments of principal and interest.							3 months
COVID-19 [Member] \| Avondale Shops Loan [Member]
Real Estate Properties [Line Items]
Debt instrument term defer payments of principal and interest.							4 months
COVID-19 [Member] \| MVB Term Loan [Member]
Real Estate Properties [Line Items]
Debt instrument term defer payments of principal and interest.							3 months
COVID-19 [Member] \| Hollinswood Loan [Member]
Real Estate Properties [Line Items]
Maturity date description					The deferred amount for the Hollinswood mortgage is due in six equal monthly installments beginning November 2020.
COVID-19 [Member] \| PPP Loan [Member]
Real Estate Properties [Line Items]
Unsecured loan					$ 800,000				$ 800,000
COVID-19 [Member] \| MVB Term Loan [Member]
Real Estate Properties [Line Items]
Maturity date					Dec. 27, 2022
COVID-19 [Member] \| April 2020 through March 2021 [Member]
Real Estate Properties [Line Items]
Deferred contractual revenue							$ 400,000
Deferred contractual revenue waived							$ 300,000
MedAmerica [Member]
Real Estate Properties [Line Items]
Number of merger agreements \| Merger			19
Number of entities that own properties acquired \| Entity			17
Date of merger		Dec. 27, 2019
Number of merger completed \| Merger		11
Number of merger not yet completed \| Merger					6
MedAmerica [Member] \| Common Stock [Member]
Real Estate Properties [Line Items]
Equity interest issued as consideration for the mergers \| shares					10,400,779
MedAmerica [Member] \| OP units [Member]
Real Estate Properties [Line Items]
Equity interest issued as consideration for the mergers \| shares					573,529
MedAmerica [Member] \| Mergers [Member]
Real Estate Properties [Line Items]
Cash portion of consideration for initial mergers					$ 1,100,000
MedAmerica [Member] \| Mergers [Member] \| Common Stock [Member]
Real Estate Properties [Line Items]
Equity interest issued as consideration for the mergers \| shares					19,660,911
MedAmerica [Member] \| Mergers [Member] \| OP units [Member]
Real Estate Properties [Line Items]
Equity interest issued as consideration for the mergers \| shares					2,827,904
MedAmerica [Member] \| Brookhill Azalea Shopping Center [Member]
Real Estate Properties [Line Items]
Number of additional merger \| Merger				1
MedAmerica [Member] \| Lamar Station Plaza East [Member]
Real Estate Properties [Line Items]
Number of merger closed \| Merger								1
MedAmerica [Member] \| Broad Street Entities [Member]
Real Estate Properties [Line Items]
Number of merger completed \| Merger		9
2020 Real Estate Acquisitions [Member] \| Lamar Station Plaza East [Member] \| COVID-19 [Member] \| Covenants [Member]
Real Estate Properties [Line Items]
Closing date of merger property					2020-07
Operating Partnership [Member]
Real Estate Properties [Line Items]
Operating partnership percentage					88.90%