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v3.23.2

Note 1 - Organization (Details Textual) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2023 USD ($)
Number of Limited Liability Companies | 2
Number of Limited Partnerships in which Company is Sole General Partner | 5
Future Principal Mortgage Notes Payables, Due | $ 3.8
Model Home Properties [Member] |
Number of Limited Partnerships in which Company is Sole General Partner | 5
Future Principal Mortgage Notes Payables, Due | $ 3.1
Commercial Property [Member] |
Number of Real Estate Properties, Fee Simple | 12
Commercial Property [Member] | Partially Owned Properties [Member] |
Number of Real Estate Properties, Fee Simple | 2

X
- Definition The amount of future principal mortgage notes payables due. + References No definition available. + Details
Name: | sqft_FuturePrincipalMortgageNotesPayablesDue
Namespace Prefix: | sqft_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the number of limited liability companies. + References No definition available. + Details
Name: | sqft_NumberOfLimitedLiabilityCompanies
Namespace Prefix: | sqft_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of limited partnerships in which the Company is the sole general partner. + References No definition available. + Details
Name: | sqft_NumberOfLimitedPartnershipsInWhichCompanyIsSoleGeneralPartner
Namespace Prefix: | sqft_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned as of the statement of financial position to which the entity has fee simple title. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstatePropertiesFeeSimple
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=sqft_ModelHomePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=us-gaap_PartiallyOwnedPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |