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Note 7 - Mortgage Notes Payable - Mortgage Notes Payable (Details) - USD ($) | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Mortgage Notes Payable, net |  | $ 92,839,456 | $ 88,859,832
Mortgage Notes [Member] |  |  |
Mortgage Notes Payable |  | 93,512,753 | 89,422,132
Unamortized loan costs |  | (673,297) | (562,300)
Mortgage Notes [Member] | The 300 N.P [Member] |  |  |
Mortgage Notes Payable | [1] | $ 2,222,085 | 2,232,923
Interest rate | [1],[2] | 4.95% |
Mortgage Notes [Member] | Dakota Center [Member] |  |  |
Mortgage Notes Payable |  | $ 9,618,055 | 9,677,108
Interest rate | [2] | 4.74% |
Mortgage Notes [Member] | Research Parkway [Member] |  |  |
Mortgage Notes Payable |  | $ 1,691,348 | 1,705,438
Interest rate | [2] | 3.94% |
Mortgage Notes [Member] | Arapahoe Center [Member] |  |  |
Mortgage Notes Payable |  | $ 7,728,270 | 7,770,887
Interest rate | [2] | 4.34% |
Mortgage Notes [Member] | Union Town Center [Member] |  |  |
Mortgage Notes Payable |  | $ 8,135,901 | 8,173,568
Interest rate | [2] | 4.28% |
Mortgage Notes [Member] | One Park Centre [Member] |  |  |
Mortgage Notes Payable |  | $ 6,247,917 | 6,276,849
Interest rate | [2] | 4.77% |
Mortgage Notes [Member] | Genesis Plaza [Member] |  |  |
Mortgage Notes Payable |  | $ 6,139,881 | 6,168,604
Interest rate | [2] | 4.71% |
Mortgage Notes [Member] | Shea Center II [Member] |  |  |
Mortgage Notes Payable |  | $ 17,426,568 | 17,494,527
Interest rate | [2] | 4.92% |
Mortgage Notes [Member] | West Fargo Industrial [Member] |  |  |
Mortgage Notes Payable |  | $ 4,119,239 | 4,148,405
Interest rate | [2] | 3.27% |
Mortgage Notes [Member] | Baltimore [Member] |  |  |
Mortgage Notes Payable |  | $ 5,670,000 | 0
Interest rate | [2],[3],[4] | 4.67% |
Mortgage Notes [Member] | Grand Pacific Center [Member] |  |  |
Mortgage Notes Payable | [3],[4] | $ 3,589,291 | 3,619,695
Interest rate | [2] | 4.02% |
Mortgage Notes [Member] | Subtotal, Presidio Property Trust, Inc. Properties [Member] |  |  |
Mortgage Notes Payable |  | $ 72,588,555 | 67,268,004
Mortgage Notes [Member] | Model Home [Member] |  |  |
Mortgage Notes Payable | [4],[5] | $ 20,924,198 | $ 22,154,128
[1] | The mortgage note payable for 300 N.P. is an amortizing loan with a balloon payment of $2.2 million due at maturity, on June 11, 2022, and is no longer subject to defeasance or yield maintenance. The Company paid this note in full on May 11, 2022 with available cash on hand.
[2] | Interest rates as of March 31, 2022.
[3] | Interest rate is subject to reset on September 1, 2023.
[4] | Property held for sale as of March 31, 2022. There were four model homes included as real estate assets held for sale.
[5] | Our model homes have stand-alone mortgage note at interest rates ranging from 2.50% to 5.63% per annum as of March 31, 2022.

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