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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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