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SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 USD ($) Integer $ / shares shares | Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) $ / shares shares | Sep. 30, 2021 USD ($) Integer $ / shares | Sep. 30, 2020 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) $ / shares
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization of above and below Market Leases | $ 6,000 |  |  | $ 26,000 | $ 4,000 |  | $ 84,000 | $ 100,000 |  | $ 100,000 |
Amortization of financing costs | 68,000 |  |  | 116,000 | 275,000 |  | 369,000 | 200,000 |  | 300,000 |
Deferred costs, total | 1,300,000 |  |  |  | 1,300,000 |  |  | 1,900,000 |  | 2,100,000 |
Operating lease, iInitial direct cost expense, over term | 85,000 |  |  | 106,000 | 257,000 |  | 306,000 | 400,000 |  | 600,000 |
Cash equivalents, at carrying value, total | 27,800,000 |  |  |  | 27,800,000 |  |  | 11,500,000 |  |  |
Restricted cash, total | $ 3,800,000 |  |  |  | $ 3,800,000 |  |  | 4,200,000 |  |  |
Number of real estate properties held for sale | Integer | 1 |  |  |  | 1 |  |  |  |  |  |
Unamortized Deferred Stock Costs | $ 2,000 |  |  |  | $ 2,000 |  |  | 109,000 |  |  |
Real estate investment property and lease intangibles, net | 125,888,000 |  |  |  | 125,888,000 |  |  | 166,254,000 |  | 200,207,000 |
Impairment of real estate |  |  |  |  | 300,000 |  | 845,674 | 1,730,851 |  |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | shares | 401,167 |  |  | 212,517 |  |  |  |  |  |  |
Amortization of intangible assets, total |  |  |  |  |  |  |  | 400,000 |  | 600,000 |
Asset impairment charges |  |  |  |  |  |  |  | $ 0 |  | 0 |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  | 39 years |  |  |
Depreciation and amortization |  |  |  |  | 4,104,018 |  | 4,823,673 | $ 6,274,321 |  | 7,364,688 |
Cash, FDIC insured amount |  |  |  |  |  |  |  | 250,000 |  |  |
Escrow deposit |  |  |  |  |  |  |  | 9,800,000 |  |  |
Restricted Cash |  |  |  |  |  |  |  | 4,100,000 |  |  |
Accounts receivables |  |  |  |  |  |  |  | 70,000 |  | 21,000 |
Amortization of Debt Issuance Costs |  |  |  |  | $ 431,806 |  | $ 992,705 | 1,287,430 |  | 965,239 |
Deferred Offering Costs |  |  |  |  |  |  |  | 108,660 |  |  |
Noninterest Expense Offering Cost |  |  |  |  |  |  |  | $ 530,639 |  |  |
Percentage of Distributed Taxable Income to Qualify as REIT |  |  |  |  |  |  |  | 90.00% |  |  |
Earnings Per Share, Basic and Diluted | $ / shares | $ 0.13 |  |  | $ 0.20 | $ 0.33 |  | $ 0.54 | $ 0.85 |  | $ 0.07 |
Domestic Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating Loss Carryforwards, Total |  |  |  |  |  |  |  | $ 11,000,000.0 |  |  |
Mortgage Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  |  |  |  |  | 800,000 |  | $ 1,100,000 |
Amortization of Debt Issuance Costs |  |  |  |  |  |  |  | 400,000 |  | 500,000 |
Notes Payable to Banks [Member] | Polar Multi Strategy Master Fund [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  |  |  |  |  | 200,000 |  |  |
Amortization of Debt Issuance Costs |  |  |  |  |  |  |  | 900,000 |  | 400,000 |
Series D Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital, stock issued, issuance costs |  |  |  |  | $ 2,500,000 |  |  |  |  |  |
Class A Common Stock and Related Warrants [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital, stock issued, issuance costs |  |  |  |  | $ 1,100,000 |  |  |  |  |  |
Series B Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unamortized Deferred Stock Costs |  |  |  |  |  |  |  |  |  | 100,000 |
Model Home [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties held for sale | Integer | 3 |  |  |  | 3 |  |  |  |  |  |
Highland Court [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Real estate investment property and lease intangibles, net |  | [1],[2] |  |  |  | [1],[2] |  | 10,500,000 | [1],[2],[3] | 11,421,000 | [3]
Impairment of real estate |  |  | $ 300,000 |  |  |  |  | 1,300,000 |  | $ 400,000 |
Highland Court [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  |  |  |  |  | $ 10,200,000 |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization of value in place leases (Year) |  |  |  |  | 10 years |  |  | 10 years |  |  |
Investment in real estate and accumulated depreciation, life used for depreciation (Year) |  |  |  |  | 5 years |  |  | 5 years |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  | 10 years |  |  |
Maximum [Member] | Furniture and Fixtures [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease, remaining lease term |  |  |  |  |  |  |  | 5 years |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Investment in real estate and accumulated depreciation, life used for depreciation (Year) |  |  |  |  | 1 year |  |  | 1 year |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  | 1 year |  |  |
Minimum [Member] | Furniture and Fixtures [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease, remaining lease term |  |  |  |  |  |  |  | 4 years |  |  |
[1] | A portion of the proceeds from the sale of Highland Court were used in like-kind exchange transactions pursued under Section 1031 of the Internal Revenue for the acquisition of our Mandolin property. Mandolin is owned by NetREIT Palm Self-Storage LP, through its wholly owned subsidiary NetREIT Highland LLC, and the Company is the sole general partner and owns 61.3% of NetREIT Palm Self-Storage LP.
[2] | This property was sold during the nine months ended September 30, 2021.
[3] | Property held for sale as of December 31, 2020.

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