XML 72 R54.htm IDEA: XBRL DOCUMENT
v3.26.1

Note 7 - Mortgage Notes Payable (Details Textual) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 06, 2025 | Jun. 20, 2024 | Jul. 31, 2025 | Dec. 31, 2025 | Dec. 31, 2024
Impairment of Real Estate |  |  |  | $ 6,371,437 | $ 1,784,311
Mortgage Loan on West Fargo Industrial Properties [Member] |  |  |  |  |
Debt Instrument, Term (Year) |  | 5 years |  |  |
Mortgage Loan on One Park Center [Member] |  |  |  |  |
Debt Instrument, Term (Year) | 5 years |  |  |  |
Dakota Center [Member] |  |  |  |  |
Real Estate, Purchase Offer Price |  |  | $ 5,125,000 |  |
Impairment of Real Estate |  |  |  | 3,500,000 |
Shea Center II [Member] |  |  |  |  |
Impairment of Real Estate |  |  |  | 2,500,000 |
Model Home [Member] |  |  |  |  |
Impairment of Real Estate |  |  |  | $ 300,000 |
Model Home [Member] | Mortgage Notes [Member] |  |  |  |  |
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio |  |  |  | 1.1 |
Model Home [Member] | Mortgage Notes [Member] | Minimum [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 5.94% |
Model Home [Member] | Mortgage Notes [Member] | Maximum [Member] |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 8.00% |

X
- Definition Minimum fixed charge coverage ratio under the covenant of the debt instrument. + References No definition available. + Details
Name: | sqft_DebtInstrumentCovenantMinimumFixedChargeCoverageRatio
Namespace Prefix: | sqft_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The purchase offer price for real estate. + References No definition available. + Details
Name: | sqft_RealEstatePurchaseOfferPrice
Namespace Prefix: | sqft_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-2 + Details
Name: | us-gaap_ImpairmentOfRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sqft_MortgageLoanOnWestFargoIndustrialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sqft_MortgageLoanOnOneParkCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_DakotaCenterMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_SheaCenterIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_ModelHomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=sqft_MortgageNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |