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Note 2 - Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amortization of above and below Market Leases			$ 55,000	$ 18,000
Real Estate Investment Property and Lease Intangibles, Net	$ 138,064,936		130,512,230	138,064,936
Impairment of Real Estate			0	608,000
Goodwill and Intangible Asset Impairment, Total			0
Depreciation, Depletion and Amortization, Nonproduction, Total			5,465,015	5,397,498
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	14,702,089		16,516,725	14,702,089
Cash, Uninsured Amount	7,300,000		8,800,000	7,300,000
Restricted Cash, Total	4,700,000		4,400,000	4,700,000
Accounts Receivable, Allowance for Credit Loss, Ending Balance	70,000		138,000	70,000
Deferred Costs, Total	1,300,000		1,500,000	1,300,000
Operating Lease, Initial Direct Cost Expense, over Term			400,000	300,000
Amortization of Debt Issuance Costs			240,090	479,853
Unamortized Deferred Stock Costs	135,000		117,000	135,000
Deferred Offering Costs			$ 0
Percentage of Distributed Taxable Income to Qualify as REIT			90.00%
Marketable Securities, Total	1,514,483		$ 797,749	1,514,483
Marketable Securities, Cost Basis	1,600,000		900,000	1,600,000
Liabilities, Fair Value Disclosure, Total	0		$ 0	$ 0
Earnings Per Share, Basic, Total (in dollars per share)			$ (0.57)	$ (0.46)
Fair Value, Inputs, Level 1 [Member]
Marketable Securities, Total	1,500,000		$ 800,000	$ 1,500,000
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total			18,000,000.0
Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member]
Debt Issuance Costs, Net, Total	600,000		900,000	600,000
Amortization of Debt Issuance Costs			$ 200,000	900,000
Building and Building Improvements [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			39 years
Highland Court [Member]
Real Estate Investment Property and Lease Intangibles, Net					$ 10,500,000
Impairment of Real Estate		$ 300,000
Highland Court [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Disposal Group, Including Discontinued Operation, Consideration					$ 10,200,000
The 300 N.P [Member]
Real Estate Investment Property and Lease Intangibles, Net	2,929,563		$ 2,899,694	2,929,563
Impairment of Real Estate	$ 300,000
Lease Intangibles [Member]
Amortization of Intangible Assets			200,000	300,000
Finite-lived Intangibles, Other Than Lease Intangibles [Member]
Amortization of Intangible Assets			$ 100,000	$ 200,000
Maximum [Member]
Amortization of Value In Place Leases (Year)				10 years
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			5 years
Maximum [Member] | Leasehold Improvements [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			10 years
Maximum [Member] | Furniture and Fixtures [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			5 years
Minimum [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			1 year
Minimum [Member] | Leasehold Improvements [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			1 year
Minimum [Member] | Furniture and Fixtures [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)			4 years
SPAC, Murphy Canyon Acquisition Corp. [Member]
Equity Method Investment, Ownership Percentage			23.50%

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