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Mortgage Notes Payable (Scheduled Principal Payments of Mortgage Notes Payable) (Details)	Jun. 30, 2019 USD ($)
Debt Instrument [Line Items]
Six months remaining in 2019	$ 6,167,637
2020	28,430,992
2021	21,911,529
2022	13,922,504
2023	1,783,291
Thereafter	77,137,134
Total	149,353,087
Presidio Property Trust, Inc. [Member]
Debt Instrument [Line Items]
Six months remaining in 2019	951,000
2020	16,968,243
2021	10,745,976
2022	10,055,656
2023	1,783,291
Thereafter	77,137,134
Total	117,641,300
Model Home [Member]
Debt Instrument [Line Items]
Six months remaining in 2019	5,216,637
2020	11,462,749
2021	11,165,553
2022	3,866,848
Total	$ 31,711,787

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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