XML 52 R37.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Lease Intangibles (Net Value of Other Intangible Assets and Amortization by Class) (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Lease intangibles | $ 9,096,794 | $ 12,663,629
Accumulated amortization | (5,182,342) | (7,033,976)
Lease intangibles, net | 3,914,452 | 5,629,653
Leases, Acquired-in-Place [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Lease intangibles | 4,958,477 | 6,180,817
Accumulated amortization | (2,899,042) | (3,156,194)
Lease intangibles, net | 2,059,435 | 3,024,623
Leasing Cost [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Lease intangibles | 3,628,080 | 4,632,619
Accumulated amortization | (1,990,154) | (2,339,434)
Lease intangibles, net | 1,637,926 | 2,293,185
Above Market Leases [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Lease intangibles | 510,237 | 1,850,193
Accumulated amortization | (293,146) | (1,538,348)
Lease intangibles, net | $ 217,091 | $ 311,845

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=sqft_LeasingCostMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |