Note 7 - Mortgage Notes Payable - Mortgage Notes Payable (Details) - USD ($)		Sep. 30, 2022	Dec. 31, 2021
Mortgage Notes Payable, net		$ 94,141,380	$ 88,859,832
Mortgage Notes [Member]
Mortgage Notes Payable		94,828,477	89,422,132
Unamortized loan costs		(687,097)	(562,300)
Mortgage Notes [Member] | The 300 N.P [Member]
Mortgage Notes Payable	[1]	$ 0	2,232,923
Interest rate	[1],[2]	4.95%
Mortgage Notes [Member] | Dakota Center [Member]
Mortgage Notes Payable		$ 9,502,870	9,677,108
Interest rate	[2]	4.74%
Mortgage Notes [Member] | Research Parkway [Member]
Mortgage Notes Payable		$ 1,662,749	1,705,438
Interest rate	[2]	3.94%
Mortgage Notes [Member] | Arapahoe Center [Member]
Mortgage Notes Payable		$ 7,645,349	7,770,887
Interest rate	[2]	4.34%
Mortgage Notes [Member] | Union Town Center [Member]
Mortgage Notes Payable		$ 8,063,205	8,173,568
Interest rate	[2]	4.28%
Mortgage Notes [Member] | One Park Centre [Member]
Mortgage Notes Payable		$ 6,192,311	6,276,849
Interest rate	[2]	4.77%
Mortgage Notes [Member] | Genesis Plaza [Member]
Mortgage Notes Payable		$ 6,084,613	6,168,604
Interest rate	[2]	4.71%
Mortgage Notes [Member] | Shea Center II [Member]
Mortgage Notes Payable		$ 17,297,630	17,494,527
Interest rate	[2]	4.92%
Mortgage Notes [Member] | West Fargo Industrial [Member]
Mortgage Notes Payable	[3]	$ 4,060,187	4,148,405
Interest rate	[2],[3]	3.27%
Mortgage Notes [Member] | Grand Pacific Center [Member]
Mortgage Notes Payable	[4],[5]	$ 3,527,628	3,619,695
Interest rate	[2],[4],[5]	4.02%
Mortgage Notes [Member] | Baltimore [Member]
Mortgage Notes Payable		$ 5,670,000	0
Interest rate	[2]	4.67%
Mortgage Notes [Member] | Mandolin [Member]
Mortgage Notes Payable		$ 3,650,580	0
Interest rate	[2]	4.35%
Mortgage Notes [Member] | Subtotal, Presidio Property Trust, Inc. Properties [Member]
Mortgage Notes Payable		$ 73,357,122	67,268,004
Mortgage Notes [Member] | Model Home [Member]
Mortgage Notes Payable	[5],[6]	$ 21,471,355	$ 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. The Company paid this note in full on May 11, 2022 with available cash on hand.

[2] Interest rates as of September 30, 2022.

[3] Interest rate is subject to possible reset on August 5, 2023.

[4] Interest rate is subject to possible reset on September 1, 2023.

[5] Property held for sale as of September 30, 2022. There were three model homes included as real estate assets held for sale.

[6] Our model homes have stand-alone mortgage notes at interest rates ranging from 2.50% to 5.34% per annum as of September 30, 2022.