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Mortgage Notes Payable (Scheduled Principal Payments of Mortgage Notes Payable) (Detail) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Debt Instrument [Line Items] |  |
2017 | $ 774,370 | $ 3,771,756
2018 | 3,651,695 | 7,366,855
2019 | 18,982,595 | 19,917,067
2020 | 33,158,618 | 5,066,806
2021 | 14,496,465 | 12,081,874
Thereafter | 93,637,314 | 112,624,246
Total | 164,701,057 | 160,828,604
Presidio Property Trust, Inc. [Member] |  |
Debt Instrument [Line Items] |  |
2017 | 474,791 | 1,927,307
2018 | 1,931,368 | 6,213,089
2019 | 2,286,504 | 3,153,040
2020 | 21,156,934 | 2,569,269
2021 | 14,496,465 | 12,081,874
Thereafter | 93,637,314 | 112,624,246
Total | 133,983,376 | 138,568,825
Model Home [Member] |  |
Debt Instrument [Line Items] |  |
2017 | 299,579 | 1,844,449
2018 | 1,720,327 | 1,153,766
2019 | 16,696,091 | 16,764,027
2020 | 12,001,684 | 2,497,537
Total | $ 30,717,681 | $ 22,259,779

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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04.(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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