Represents the occupancy percentage for a property under triple net lease.

No definition available.

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- Definition

Amount of consideration transferred for the purchase of real estate.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
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-SubTopic 10
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-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126905981&loc=d3e2443-110228

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Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
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-Section S99
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-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

- Definition

The cash outflow for acquisition of buildings (properties) whether for investment or use.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow from the acquisition of residential property intended to generate income for the owner.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3179-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix:
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Balance Type:
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- Details

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

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=sqft_ModelHomeMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sqft_MortgageNotesMember
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Data Type:	na
Balance Type:
Period Type:

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Period Type:

- Details

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Data Type:	na
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Period Type:

- Details

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- Details

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- Details

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Note 3 - Recent Real Estate Transactions (Details Textual) $ in Millions						9 Months Ended
	Aug. 17, 2021 USD ($) a	May 21, 2021 USD ($)	May 20, 2021 USD ($)	Feb. 19, 2021 USD ($)	Jan. 28, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Discontinued Operations, Disposed of by Sale [Member]
Number of Real Estate Properties							39
Proceeds from Sale of Real Estate						$ 13.5	$ 19.0
Gain (Loss) on Sale of Properties						$ 4.3	$ 2.9
NetREIT Palm Self Storage, LP and NetREIT Highland LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent	61.30%
Model Home [Member]
Number of Real Estate Properties						15	6
Real Estate Property, Consideration Transferred, Total						$ 8.1	$ 2.9
Payments to Acquire Residential Real Estate						2.5	0.9
Model Home [Member] \| Mortgage Notes [Member]
Notes Payable, Total						5.6	$ 2.0
Mandolin [Member]
Area of Real Estate Property (Acre) \| a	10,500
Payments to Acquire Buildings	$ 4.9
Property Under Triple Net Lease, Percent Occupied	100.00%
Waterman Plaza [Member] \| Discontinued Operations [Member]
Proceeds from Sale of Real Estate						10.0
Gain (Loss) on Sale of Properties						$ (0.3)
Waterman Plaza [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate					$ 3.5
Gain (Loss) on Sale of Properties					$ (0.2)
Garden Gateway [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate				$ 11.2
Gain (Loss) on Sale of Properties				$ (1.4)
Highland Court [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate			$ 10.2
Gain (Loss) on Sale of Properties			$ (1.6)
Executive Office Park [Member] \| Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate		$ 8.1
Gain (Loss) on Sale of Properties		$ 2.5