Note 4 - Real Estate Assets (Details Textual)	9 Months Ended
Sep. 30, 2023 ft²	May 05, 2023 ft²
Number of States Real Estate Property is Located	5
Number of Limited Partnerships in which Company is Sole General Partner	5
Number of Limited Liability Companies	2
NetREIT Palm Self-Storage LP [Member]
Subsidiary, Ownership Percentage, Parent	61.30%
Office/Industrial Properties [Member]
Area of Real Estate Property (Square Foot)	758,356
Retail Properties [Member]
Area of Real Estate Property (Square Foot)	65,242
Model Home [Member]
Number of Real Estate Properties	102
Area of Real Estate Property (Square Foot)	309,257
Number of Limited Partnerships in which Company is Sole General Partner	5
Number of Limited Liability Companies	1
Office Building [Member] \| Office/Industrial Properties [Member]
Number of Real Estate Properties	1
Genesis Plaza [Member] \| Tenant-in-common One [Member]
Percentage Ownership in Property	57.00%
Genesis Plaza [Member] \| Tenant-in-common Two [Member]
Percentage Ownership in Property	43.00%
Percentage Beneficial Ownership in Property	76.40%
Grand Pacific Center [Member]
Area of Real Estate Property (Square Foot)	33,296	33,296
Lessee, Operating Lease, Term of Contract (Year)	10 years
Office Buildings [Member] \| Office/Industrial Properties [Member]
Number of Real Estate Properties	8
Retail Site [Member] \| Retail Properties [Member]
Number of Real Estate Properties	3
COLOMBIA
Number of Real Estate Properties	5
NORTH DAKOTA
Number of Real Estate Properties	4
CALIFORNIA
Number of Real Estate Properties	1
TEXAS
Number of Real Estate Properties	1
MARYLAND
Number of Real Estate Properties	1

Represents the number of limited liability companies.

No definition available.

Name:	sqft_NumberOfLimitedLiabilityCompanies
Namespace Prefix:	sqft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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

- Definition

The number of states in which real estate property is located.

+ References

No definition available.

+ Details

Name:	sqft_NumberOfStatesRealEstatePropertyIsLocated
Namespace Prefix:	sqft_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the aggregate percentage ownership by the reporting entity in the specified property.

+ References

No definition available.

+ Details

Name:	sqft_PercentageBeneficialOwnershipInProperty
Namespace Prefix:	sqft_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of the property owned.

+ References

No definition available.

+ Details

Name:	sqft_PercentageOwnershipInProperty
Namespace Prefix:	sqft_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_OwnershipAxis=sqft_NetREITPalmSelfStorageLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sqft_OfficeIndustrialPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sqft_RetailPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=sqft_ModelHomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=srt_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_GenesisPlazaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sqft_TenantInCommonOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sqft_TenantInCommonTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_GrandPacificCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_OfficeBuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_CO
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_ND
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_TX
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_MD
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: