XML 62 R47.htm IDEA: XBRL DOCUMENT
v3.19.1

Stockholders' Equity (Dividends) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 23, 2012 | Mar. 22, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash Dividends [Abstract] |  |  |  |
Cash dividends paid |  |  | $ 0 |
Cash dividends paid, net of reinvested stock dividends |  |  |  | $ 3,621,000
Annualized dividend rate (in dollars per share) |  |  |  | $ 0.40
Dividend Reinvestment Plan [Abstract] |  |  |  |
Registered shares of common stock pursuant to dividend reinvestment plan (in shares) | 3,000,000 |  |  |
Percentage of purchase price per share (in hundredths) | 95.00% |  |  |
Former sales price per share (in dollars per share) | $ 10.00 |  |  |
Payment of sales commission or dealer manager fee | $ 0 |  |  |
Notice period for amendments to Dividend Reinvestment Plan |  |  | 30 days |
Dividend reinvestments |  |  | $ 0 |
Common stock issued under dividend reinvestment plan |  |  | $ 17,424,399 |
Common stock issued under dividend reinvestment plan (in shares) |  |  | 1,834,147 |
Subsequent Event [Member] |  |  |  |
Cash Dividends [Abstract] |  |  |  |
Cash dividends paid |  | $ 1,075,000 |  |
Annualized dividend rate (in dollars per share) |  | $ 0.06 |  |

X
- Definition Amount of cash outflow in the form of dividends, net of reinvested stock dividends. + References No definition available. + Details
Name: | sqft_CashDividendsPaidNetOfReinvestedStockDividends
Namespace Prefix: | sqft_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Dividend Reinvestment Plan [Abstract] + References No definition available. + Details
Name: | sqft_DividendReinvestmentPlanAbstract
Namespace Prefix: | sqft_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Dividend of reinvestments. + References No definition available. + Details
Name: | sqft_DividendReinvestments
Namespace Prefix: | sqft_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The period of notice for an amendment, suspension or termination to the Dividend Reinvestment Plan prior to a designated dividend record date. + References No definition available. + Details
Name: | sqft_NoticePeriodForAmendmentsToDividendReinvestmentPlan
Namespace Prefix: | sqft_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payment of sales commission or dealer manager fee. + References No definition available. + Details
Name: | sqft_PaymentOfSalesCommissionOrDealerManagerFee
Namespace Prefix: | sqft_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of the purchase price per share of the entity. + References No definition available. + Details
Name: | sqft_PercentageOfPurchasePricePerShare
Namespace Prefix: | sqft_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of registered shares of common stock pursuant to the dividend reinvestment plan. + References No definition available. + Details
Name: | sqft_RegisteredSharesOfCommonStockPursuantToDividendReinvestmentPlan
Namespace Prefix: | sqft_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Per share amount for each share of common stock formerly sold. + References No definition available. + Details
Name: | sqft_SalesPricePerShareOfStock
Namespace Prefix: | sqft_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DividendsCashAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_DividendsCommonStockCash
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value of stock issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the holder of the stock to reinvest dividends paid to them by the entity on new issues of stock by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |