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MORTGAGE NOTES PAYABLE (Scheduled Principal Payments of Mortgage Notes Payable) (Details)	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Three months remaining in 2019	$ 2,755,146
2020	28,432,118
2021	16,630,718
2022	14,341,881
2023	1,783,291
Thereafter	77,141,721
Total	141,084,875
Presidio Property Trust, Inc. Notes Payable
Debt Instrument [Line Items]
Three months remaining in 2019	482,495
2020	16,846,577
2021	4,951,463
2022	10,055,657
2023	1,783,291
Thereafter	77,141,721
Total	111,261,204
Model Home
Debt Instrument [Line Items]
Three months remaining in 2019	2,272,651
2020	11,585,541
2021	11,679,255
2022	4,286,224
2023	0
Thereafter	0
Total	$ 29,823,671

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