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Note 6 - Other Assets (Details Textual) Pure in Thousands	Dec. 31, 2025	Dec. 31, 2024
Number of Publicly Traded REITs in which Common Shares are Owned	0	0
Number of Publicly Traded REITs in which Options are Owned	0	0

X

- Definition

Represents the number of publicly traded REITs in which the reporting entity owns common shares as of the specified date.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the number of publicly traded REITs in which the reporting entity owns options as of the specified date.

+ References

No definition available.

+ Details

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