Note 5 - Debt - Schedule of Debt Balance (Parenthetical) (Details) - USD ($) $ in Thousands			1 Months Ended	3 Months Ended		12 Months Ended
		Dec. 27, 2019	Jun. 30, 2020	Mar. 31, 2020		Dec. 31, 2019
Debt Instrument [Line Items]
Debt instrument net of discount				$ 1,200		$ 1,300
Preferred investor, additional capital contribution			$ 2,900
Preferred units, cumulative annual return			13.00%
MVB Revolver [Member]
Debt Instrument [Line Items]
Interest Rate	[1]			6.75%		6.75%
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] | Hollinswood Loan [Member]
Debt Instrument [Line Items]
Interest Rate				4.06%
Basis Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount				$ 1,025		$ 1,118
Interest Rate		6.125%		6.125%	[1]	6.125%	[1]
Balance outstanding				$ 63,800
Preferred investor, additional capital contribution				$ 2,900
Basis Term Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate		6.125%
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] | London Interbank Offered Rate (LIBOR) | Interest Rate Cap [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				$ 206		$ 224
Interest Rate	[1],[2],[3]			14.00%		14.00%
Cromwell Land Loan [Member]
Debt Instrument [Line Items]
Debt instrument net of discount				$ 13
Interest Rate	[1]			6.75%		6.75%
Hollinswood Loan [Member]
Debt Instrument [Line Items]
Interest Rate	[1]			4.06%		4.06%
Hollinswood Loan [Member] | Interest Rate Cap [Member]
Debt Instrument [Line Items]
Debt instrument variable rate		4.06%
Hollinswood Loan [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate				2.25%		2.25%
Vista Shops at Golden Mile Loan [Member]
Debt Instrument [Line Items]
Interest Rate	[1]			3.49%		3.49%
Vista Shops at Golden Mile Loan [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate				2.50%		2.50%
Brookhill Azalea Shopping Center Loan [Member]
Debt Instrument [Line Items]
Interest Rate	[1]			3.74%		3.74%
Brookhill Azalea Shopping Center Loan [Member] | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument variable rate				2.75%		2.75%
Basis Preferred Interest Minimum Multiple Amount [Member]
Debt Instrument [Line Items]
Balance outstanding				$ 2,500		$ 2,800

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

[2] 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.

[3] 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”.