Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Statement [Line Items] Statement [Line Items] Preferred stock par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Bad debt reserve Allowance for Doubtful Accounts, Premiums and Other Receivables Document And Entity Information [Abstract] Document Information [Table] Document Information [Table] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Related Party Transaction, Due from (to) Related Party [Abstract] Schedule Of Related Party Transactions, By Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Financing Fees, Expensed [Member] Financing Fees, Expensed [Member] Expensed Asset management Fees [Member] Expensed Asset management Fees [Member] Expensed Reimbursement Of Operating Expenses [Member] Expensed Reimbursement Of Operating Expenses [Member] Expensed Property Management Fees [Member] Expensed Property Management Fees [Member] Expensed Disposition Fees [Member] Expensed Disposition Fees [Member] Capitalized Acquisition Fees [Member] Capitalized Acquisition Fees [Member] Capitalized Leasing Fees [Member] Capitalized Leasing Fees [Member] Capitalized Legal Leasing Fees [Member] Capitalized Legal Leasing Fees [Member] Capitalized Construction Management Fees [Member] Capitalized Construction Management Fees [Member] Financing Coordination Fees, Capitalized [Member] Financing Coordination Fees, Capitalized [Member] Financing Coordination Fees, Capitalized [Member] Expensed [Member] Expensed [Member] Expensed. Capitalized [Member] Capitalized [Member] Capitalized. Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Advisor Fees [Member] Advisor Fees [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Summarized below are the related-party transactions Related Party Transactions [Abstract] Related-party costs, Incurred Related Party Transaction, Amounts of Transaction Related-party costs, Payable Due to Related Parties Real Estate Investments, Net [Abstract] Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] Business Acquisition, Pro Forma Information [Table Text Block] Business Acquisition, Pro Forma Information [Table Text Block] Disposal Groups, Including Discontinued Operations [Table Text Block] Disposal Groups, Including Discontinued Operations [Table Text Block] Debt Disclosure [Abstract] Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Joint Venture Contribution [Axis] Joint Venture Contribution [Axis] Joint Venture Contribution [Domain] Joint Venture Contribution [Domain] Subsequent Contributuion [Member] Subsequent Contributuion [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Wilshire Joint Venture [Member] Wilshire Joint Venture [Member] Sunset and Gardner Joint Venture [Member] Sunset and Gardner Joint Venture [Member] Sunset and Gardner Joint Venture [Member] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standard Update 2015-03 [Member] Accounting Standards Update 2015-03 [Member] Short-term Debt [Line Items] Short-term Debt [Line Items] Proceeds from Loan Originations Proceeds from Loan Originations Interest Rate Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Maturity Date Debt Instrument, Maturity Date Earnings Per Share [Abstract] Numerator - basic and diluted Numerator Basic and Diluted [Abstract] Numerator basic and diluted. Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to common stockholders Net Income (Loss) Attributable to Parent Denominator - basic and diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic weighted average common shares Weighted Average Number of Shares Outstanding, Basic Common Units (1) Incremental Common Shares Attributable to Dilutive Effect of Equity Unit Purchase Agreements Diluted weighted average common shares Weighted Average Number of Shares Outstanding, Diluted Earnings per common share - basic and diluted Earnings Per Share, Basic and Diluted [Abstract] Net earnings attributable to common shares Earnings Per Share, Basic and Diluted Organization, Consolidation and Presentation of Financial Statements [Abstract] VARIABLE INTEREST ENTITIES Variable Interest Entity Disclosure [Text Block] Real Estate [Abstract] Asset Acquisition [Table] Asset Acquisition [Table] Asset Acquisition [Table] Asset Acquisition [Axis] Asset Acquisition [Axis] Asset Acquisition [Axis] Asset Acquisition [Domain] Asset Acquisition [Domain] [Domain] for Asset Acquisition [Axis] 388 Fulton [Member] 388 Fulton [Member] 388 Fulton [Member] SilverLake [Member] SilverLake [Member] SilverLake [Member] Asset Acquisition [Line Items] Asset Acquisition [Line Items] [Line Items] for Asset Acquisition [Table] Area of Real Estate Property Area of Real Estate Property Payments to Acquire Real Estate Payments to Acquire Real Estate Proceeds from Secured Lines of Credit Proceeds from Secured Lines of Credit Business Combination, Acquisition Related Costs Business Combination, Acquisition Related Costs Stockholders' Equity Note [Abstract] Share Redemption Program Schedule of Stock by Class [Table Text Block] Distributions declared and paid Dividends Declared [Table Text Block] REAL ESTATE INVESTMENTS Real Estate Disclosure [Text Block] Strategic Realty Trust [Member] Strategic Realty Trust [Member] Strategic Realty Trust [Member] Sunset Gardner LA, LLC [Member] Sunset Gardner LA, LLC [Member] Capital Interest Percentage In Joint Venture Capital Interest Percentage In Joint Venture Capital Interest Percentage In Joint Venture Profit Sharing Ratio Of Joint Venture Profit Sharing Ratio Of Joint Venture Profit Sharing Ratio Of Joint Venture Payments to Acquire Interest in Joint Venture Payments to Acquire Interest in Joint Venture Deposits Assets, Current Deposits Assets, Current Equity Method Investments and Joint Ventures [Abstract] 3032 Wilshire SM [Member] 3032 Wilshire SM [Member] 3032 Wilshire SM [Member] GlenboroughPropertyPartnersLLC [Member] GlenboroughPropertyPartnersLLC [Member] GlenboroughPropertyPartnersLLC [Member] SRT Manager [Member] SRT Manager [Member] SGO Retail Acquisition Venture LLC [Member] SGO Retail Acquisition Venture LLC [Member] SGO MN Retail Acquisition Venture LLC [Member] SGO MN Retail Acquisition Venture LLC [Member] Debt, Current Debt, Current Company pays Advisor an acquisition and origination fee for cost of investments acquired Acquisition and Origination Fee On Cost Of Investment Acquired Percentage Acquisition and origination fee on cost of investment acquired, percentage. Financing Coordination Fee, percentage Financing Coordination Fees Percent Financing coordination fees percent. Company pays Advisor a monthly asset management fee on all real estate investments Related Party Asset Management Fee On Acquired Real Estate Investments Related party asset management fee on acquired real estate investments, percentage. Asset Management Fees Asset Management Fees Percentage of Average Invested Assets Percentage of Average Invested Assets Percentage of Average Invested Assets Percent of Net Income Percent of Net Income Percent of Net Income Property Management Fee, Percent Fee Property Management Fee, Percent Fee Advisor or its affiliates also will be paid disposition fees of a customary and competitive real estate commission Related Party Disposition Fees Of Customary and Competitive Real Estate Commission Percentage Maximum Related party disposition fees of customary and competitive real estate commission, percentage, maximum. Advisor or its affiliates also will be paid disposition fees of the contract price Related Party Disposition Fee On Contract Sales Price Percentage Related party disposition fee on contract sales price, percentage. Construction Management Fee, percentage Construction Management Fee, percentage Construction Management Fee, percentage to property manager for coordinating and facilitating the planning and the performance of all construction. Related Party Transaction, Expenses from Transactions with Related Party Related Party Transaction, Expenses from Transactions with Related Party Interest Expense Interest Expense Intangible Assets, Net (Excluding Goodwill) [Abstract] Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Lease intangibles, net Finite-Lived Intangible Assets, Net Below Market Lease, Amortization Income, Maturity Schedule [Abstract] 2019 Below Market Lease, Amortization Income, Next Twelve Months 2020 Below Market Lease, Amortization Income, Year Two 2021 Below Market Lease, Amortization Income, Year Three 2022 Below Market Lease, Amortization Income, Year Four 2023 Below Market Lease, Amortization Income, Year Five Thereafter Below Market Lease, Amortization Income, after Year Five Below Market Lease, Net Below Market Lease, Net Assets Held-for-sale, Not Part of Disposal Group [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Shops at Turkey Creek [Member] Shops at Turkey Creek [Member] Shops at Turkey Creek [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Held-for-sale [Member] Disposal Group, Held-for-sale, Not Discontinued Operations [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Depreciation Depreciation Sales Price Disposal Group, Including Discontinued Operation, Consideration Operating Income (loss) Operating Income (Loss) Land Land Building and improvements Investment Building and Building Improvements Tenant improvements Tenant Improvements Real Estate Investment Property, at Cost Real Estate Investment Property, at Cost Real Estate Investment Property, Accumulated Depreciation Real Estate Investment Property, Accumulated Depreciation Real Estate Investment Property, Net Real Estate Investment Property, Net Accounts Receivable, Net Accounts Receivable, Net Lease intangibles, net Assets Held-for-sale Assets Held-for-sale, Not Part of Disposal Group Notes Payable Notes Payable Below-market lease liabilities, net Off-market Lease, Unfavorable Disposal Group, Including Discontinued Operation, Liabilities Disposal Group, Including Discontinued Operation, Liabilities SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract] SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Text Block] SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Text Block] Accounting Policies [Abstract] Concentration Risk [Table] Concentration Risk [Table] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Clover Juice [Member] Clover Juice [Member] Clover Juice [Member] Conner Concepts [Member] Conner Concepts [Member] Conner Concepts [Member] Western Sizzling [Member] Western Sizzling [Member] Western Sizzling [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Fair Value, Concentration of Risk, Accounts Receivable Fair Value, Concentration of Risk, Accounts Receivable ASSETS Assets [Abstract] Investments in real estate Real Estate Investment Property, Net [Abstract] Land Investments in real estate, gross Accumulated depreciation Investments in real estate, net Properties under development and development costs Inventory, Operative Builders [Abstract] Land Land Available for Development Buildings Inventory, Buildings and Improvements Development costs Development in Process Properties under development and development costs Inventory, Operative Builders Cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Prepaid expenses and other assets, net Prepaid Expense and Other Assets Tenant receivables, net of $40 and $0 bad debt reserve Investments in unconsolidated joint ventures Equity Method Investments Assets held for sale Deferred financing costs, net Deferred Costs, Noncurrent TOTAL ASSETS (1) Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] LIABILITIES Liabilities [Abstract] Notes payable, net Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Amounts due to affiliates Due to Affiliate Other liabilities Other Liabilities Liabilities related to assets held for sale Deferred gain on sale of properties to unconsolidated joint venture Deferred Gain on Sale of Property TOTAL LIABILITIES (1) Liabilities Commitments and contingencies (Note 13) Commitments and Contingencies EQUITY Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value; 50,000,000 shares authorized, none issued and outstanding Preferred Stock, Value, Issued Common stock, $0.01 par value; 400,000,000 shares authorized; 10,863,299 and 10,988,438 shares issued and outstanding at December 31, 2018 and 2017, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Total stockholders’ equity Stockholders' Equity Attributable to Parent Non-controlling interests Stockholders' Equity Attributable to Noncontrolling Interest TOTAL EQUITY Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest TOTAL LIABILITIES AND EQUITY Liabilities and Equity Schedule of Real Estate Properties [Table Text Block] Schedule of Real Estate Properties [Table Text Block] Schedule III Real Estate and Accumulated Depreciation [Table Text Block] Schedule III Real Estate and Accumulated Depreciation [Table Text Block] Schedule III Real Estate and Accumulated Depreciation [Table Text Block] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Unconsolidated Joint Ventures [Member] Unconsolidated Joint Ventures [Member] Unconsolidated Joint Ventures [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Other Assets Other Assets TOTAL ASSETS (1) Other Liabilities TOTAL LIABILITIES (1) Equity Method Investment Summarized Financial Information, Equity Equity Method Investment Summarized Financial Information, Equity Equity Method Investment, Summarized Financial Information, Liabilities and Equity Equity Method Investment, Summarized Financial Information, Liabilities and Equity Revenue Equity Method Investment, Summarized Financial Information, Revenue Expenses Operating Expenses Operating loss Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations Other Income Other Income Net income (loss) Equity Method Investment, Summarized Financial Information, Net Income (Loss) Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash, Cash Equivalents and Restricted Cash [Table Text Block] Cash, Cash Equivalents and Restricted Cash [Table Text Block] Cash, Cash Equivalents and Restricted Cash [Table Text Block] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Pro Forma [Member] Pro Forma [Member] Rental and reimbursement revenues Operating Leases, Income Statement, Minimum Lease Revenue Net income Profit (Loss) from Real Estate Operations Equity [Abstract] Preferred Stock, Shares Authorized Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Issued Income Statement [Abstract] Revenue: Revenues [Abstract] Rental and reimbursements Expense: Operating Expenses [Abstract] Operating and maintenance Operating Costs and Expenses General and administrative General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Transaction expense Business Combination and Related Party Transaction Expenses Expenses recognized resulting from transactions with related party also includes transaction expenses relate to acquisition expenses and disposition expenses. Interest expense Total expense Operating income (loss) Other income (loss): Nonoperating Income (Expense) [Abstract] Equity in income (loss) of unconsolidated joint ventures Income (Loss) from Equity Method Investments Net gain on disposal of real estate Gains (Losses) on Sales of Investment Real Estate Other income Other Nonoperating Income (Expense) Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income taxes Income Tax Expense (Benefit) Net income Net income attributable to non-controlling interests Net income attributable to common stockholders Earnings per common share - basic and diluted Weighted average shares outstanding used to calculate earnings per common share - basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Finite-Lived Intangible Assets, Net [Abstract] Lease Intangibles, Cost Finite-Lived Intangible Assets, Gross Lease Intangibles, Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Below - Market Lease Liabilities, Cost Below Market Lease, Gross Below - Market Lease Liabilities, Accumulated amortization Below Market Lease, Accumulated Amortization Schedule Of Long-Term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Secured Line Of Credit [Member] Line of Credit [Member] Long-Term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-Term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Line of Credit [Member] Minimum [Member] Maximum [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Long-term Debt, Gross Long-term Debt, Gross Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Current Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Expiration Date Line of Credit Facility, Expiration Date Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Usage Under Credit Facility Usage Under Credit Facility Usage Under Credit Facility, percentage Principles of Consolidation and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] NonControllingInterestsPolicyTextBlock [Policy Text Block] NonControllingInterestsPolicyTextBlock [Policy Text Block] NonControllingInterestsPolicyTextBlock [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Cash, Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Receivables, Policy [Policy Text Block] Receivables, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration Risk, Credit Risk, Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Segment Reporting, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Property, Plant and Equipment, Policy [Policy Text Block] Real Estate Held for Development and Sale, Policy [Policy Text Block] Real Estate Held for Development and Sale, Policy [Policy Text Block] Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Assets Held for Sale and Discontinued Operations [Policy Text Block] srtr_AssetsHeldforSaleandDiscontinuedOperations [Policy Text Block] srtr_AssetsHeldforSaleandDiscontinuedOperations [Policy Text Block] Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurement, Policy [Policy Text Block] Deferred Charges, Policy [Policy Text Block] Deferred Charges, Policy [Policy Text Block] Equity Method Investments [Policy Text Block] Equity Method Investments [Policy Text Block] Income Tax, Policy [Policy Text Block] Income Tax, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Earnings Per Share, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Acquired Lease Intangibles and Below Market Lease Liabilities Schedule of Finite-Lived Intangible Assets [Table Text Block] Amortization Of Finite Lease Intangibles and Below-Market Lease Liabilities Amortization of Lease Intangibles and Below-Market Lease Liabilities [Table Text Block] Tabular disclosure of amortization of lease intangibles and below-market lease liabilities. Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Accounting Standards Update 2016-18 [Member] Accounting Standards Update 2016-18 [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents Total cash, cash equivalents, and restricted cash Change in Operating Cash Flows Change in Operating Cash Flows Change in Operating Cash Flows due to adoption of accounting pronouncement ASU 2016-18 Change in Investing Cash Flows Change in Investing Cash Flows Change in Investing Cash Flows due to adoption of accounting pronouncement ASU 2016-18 Statement of Cash Flows [Abstract] Additional Paid-in Capital Additional Paid-in Capital [Member] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net gain on disposal of real estate Loss on extinguishment of debt Equity in (income) loss of unconsolidated joint ventures Straight-line rent Straight Line Rent Amortization of deferred costs Amortization of Debt Issuance Costs and Discounts Amortization of above and below-market leases Amortization of above and below Market Leases Bad debt expense Provision for Doubtful Accounts Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Tenant receivables Increase (Decrease) in Accounts Receivable Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Amounts due to affiliates Increase (Decrease) in Due to Affiliates, Current Other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Net proceeds from the sale of real estate Proceeds from Sale of Other Real Estate Acquisition of real estate Investment in properties under development and development costs Payments for Construction in Process Improvements, capital expenditures, and leasing costs Payments for Leasing Costs, Commissions, and Tenant Improvements Investments in unconsolidated joint ventures Distributions from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Net cash provided by investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Redemption of common shares Payments for Repurchase of Equity Quarterly distributions Payments of Dividends Proceeds from notes payable Proceeds from Notes Payable Repayment of notes payable Repayments of Notes Payable Loan proceeds from an affiliate Loan Proceeds from an Affiliate Loan Proceeds from an Affiliate Repayment of loan from an affiliate Repayments of Related Party Debt Payment of penalties associated with early repayment of notes payable Payment for Debt Extinguishment or Debt Prepayment Cost Payment of loan fees from investments in consolidated variable interest entities Payment of loan fees from investments in consolidated variable interest entities Payment of loan fees from investments in consolidated variable interest entities Payment of loan fees and financing costs Payments of Financing Costs Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, cash equivalents and restricted cash – beginning of period Cash, cash equivalents and restricted cash – end of period Supplemental disclosure of non-cash investing and financing activities and other cash flow information: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Distributions declared but not paid Dividends Change in accrued liabilities capitalized to investment in development Change in accrued liabilities capitalized to investment in development Change in accrued liabilities capitalized to investment in development Change to accrued mortgage note payable interest capitalized to investment in development Change in Accrued Mortgage Note Payable Interest Capitalized to Investment in Development Change in Accrued Mortgage Note Payable Interest Capitalized to Investment in Development Amortization of deferred loan fees capitalized to investment in development Amortization of deferred loan fees capitalized to investment in development Amortization of deferred loan fees capitalized to investment in development Conversion of OP units to common shares Stock Issued During Period, Value, Conversion of Units Cumulative effect from change in accounting principle Cumulative Effect on Retained Earnings, before Tax Cash paid for interest, net of amounts capitalized Interest Paid, Net RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events [Text Block] INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES Equity Method Investments and Joint Ventures Disclosure [Text Block] Dividends [Table] Dividends [Table] Dividends [Table] Dividends [Line Items] Dividends [Line Items] [Line Items] for Dividends [Table] Minimum Percentage of Taxable Income Distributed to Shareholders Minimum Percentage of Taxable Income Distributed to Shareholders Represents the minimum percentage of taxable income distributed to shareholders. Dividends Payable, Date Declared Dividends Payable, Date Declared Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Common Stock, Dividends, Per Share, Declared Common Stock, Dividends, Per Share, Declared Distribution Limit, percentage Distribution Limit, percentage Distribution Limit, percentage Distribution Limit, value Distribution Limit, value Distribution Limit, value Total Common Stockholders Distribution Dividends, Common Stock Total Common Unit Holders Distribution Common Unit Holders Distribution Common unit holders distribution. Total Distribution Dividend Distribution To Common Stockholders And Unit Holders Payment of dividend to common stockholders and unit holders during the period. Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Common Stock, Par or Stated Value Per Share Common Stock, Shares Authorized Common Stock, Shares, Issued Proceeds from Issuance of Common Stock Proceeds from Issuance of Common Stock Stock Issued During Period, Value, Dividend Reinvestment Plan Stock Issued During Period, Value, Dividend Reinvestment Plan Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Special Distribution Shares Issued To Stockholders Special Distribution Shares Issued To Stockholders Special Distribution Shares Issued To Stockholders Cumulative stock redeemed to date, shares Cumulative stock redeemed to date, shares Cumulative stock redeemed to date, shares Cumulative stock redeemed to date, value Cumulative stock redeemed to date, value Cumulative stock redeemed to date, value Amortization [Abstract] Amortization of Intangible Assets Amortization of Intangible Assets Amortization of Below-Market Lease Liabilities Amortization of Below Market Lease Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building and Building Improvements [Member] Building and Building Improvements [Member] Tenant Improvements [Member] Tenant Improvements [Member] Tenant Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Schedule of Capital Units [Table] Schedule of Capital Units [Table] Affiliated Entity [Member] Affiliated Entity [Member] Pinehurst Square East [Member] Pinehurst Square East [Member] Pinehurst Square East [Member] Capital Units by Class [Axis] Capital Units by Class [Axis] Capital Unit, Class [Domain] Capital Unit, Class [Domain] Capital Unit [Line Items] Capital Unit [Line Items] Common Unit, Issued Common Unit, Issued Common Unit, Issuance Value Common Unit, Issuance Value Common Unit Issuance Value per Unit Common Unit Issuance Value per Unit Common Unit Issuance Value per Unit Stock Issued During Period, Shares, Conversion of Units Stock Issued During Period, Shares, Conversion of Units Conversion of Stock, Amount Converted Conversion of Stock, Amount Converted Related Party Transaction, Amounts of Transaction Operating Partnership Interest Operating Partnership Interest Operating Partnership Interest Cumulative Rate of Return Cumulative Rate of Return Cumulative Rate of Return Antidiluted Convertible Common Units of Redemption Antidiluted Convertible Common Units of Redemption Number of antidilutive shares convertible common units pursuant to the redemption rights. SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] SEC Schedule III, Real Estate and Accumulated Depreciation, by Property [Table] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] Real Estate [Abstract] Balance at the beginning of the year SEC Schedule III, Real Estate, Gross Acquisitions SEC Schedule III, Real Estate, Other Acquisitions Improvements SEC Schedule III, Real Estate, Improvements Dispositions SEC Schedule III, Real Estate, Cost of Real Estate Sold Balances associated with changes in reporting presentation (1) SEC Schedule III, Real Estate, Period Increase (Decrease) Balance at the end of the year SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract] SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract] Balance at the beginning of the year SEC Schedule III, Real Estate Accumulated Depreciation Depreciation expense SEC Schedule III, Real Estate Accumulated Depreciation, Depreciation Expense Dispositions SEC Schedule III, Real Estate Accumulated Depreciation, Real Estate Sold Balances associated with changes in reporting presentation (1) SEC Schedule III, Real Estate Accumulated Depreciation, Period Increase (Decrease) Balance at the end of the year Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Death of a shareholder [Member] Death of a shareholder [Member] Disability of a Shareholder [Member] Disability of a Shareholder [Member] Disability of a Shareholder [Member] Common Stock Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Redeemed or Called During Period, Shares Stock Redeemed or Called During Period, Shares Stock Redeemed or Called During Period, Value Stock Redeemed or Called During Period, Value Common Stock Outstanding Percentage Common Stock Outstanding Percentage Common Stock Outstanding Percentage Redemption Price for Shares Percentage Redemption Price for Shares Percentage Redemption Price for Shares Percentage Share Redemption Amount Minimum Limit Share Redemption Amount Minimum Limit Share Redemption Amount Minimum Limit Distribution Type [Axis] Distribution Type [Axis] Distribution Type [Domain] Distribution Type [Domain] More Than Seventeen Percent Internal Rate of Return [Member] More Than Seventeen Percent Internal Rate of Return [Member] More Than Seventeen Percent Internal Rate of Return [Member] More Than Twenty Two Percent Internal Rate of Return [Member] [Member] More Than Twenty Two Percent Internal Rate of Return [Member] [Member] More Than Twenty Two Percent Internal Rate of Return [Member] [Member] More Than Twelve Percent Of Return [Member] More Than Twelve Percent Of Return [Member] More Than Twelve Percent Of Return [Member] Oaktree [Member] Oaktree [Member] Oaktree [Member] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Mortgage Loans on Real Estate, New Mortgage Loans Mortgage Loans on Real Estate, New Mortgage Loans Number of Real Estate Properties Number of Real Estate Properties Investments In Joint Venture Internal Rate Of Return Investments In Joint Venture Internal Rate Of Return Investments In Joint Venture Internal Rate Of Return Investments In Joint Venture Distributions Made Percentage Investments In Joint Venture Distributions Made Percentage Investments In Joint Venture Distributions Made Percentage EquityMultipleonCapitalContribution EquityMultipleonCapitalContribution EquityMultipleonCapitalContribution Antidiluted Convertible Common Units of Redemption Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value Disclosures [Abstract] FAIR VALUE DISCLOSURES Fair Value Disclosures [Text Block] ACQUIRED LEASE INTANGIBLES AND BELOW-MARKET LEASE LIABILITIES Intangible Assets Disclosure [Text Block] EARNINGS PER SHARE Earnings Per Share [Text Block] Schedule of maturities for notes payable outstanding Schedule of Maturities of Long-term Debt [Table Text Block] NOTES PAYABLE Debt Disclosure [Text Block] Schedule of Real Estate Properties [Table] Schedule of Real Estate Properties [Table] Real Estate Property Ownership [Axis] Real Estate Property Ownership [Axis] Real Estate Properties [Domain] Real Estate Properties [Domain] Real Estate Properties [Line Items] Real Estate Properties [Line Items] Partnership Interest Ownership Percentage Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Net Rentable Area Net Rentable Area Number of States in which Entity Operates Number of States in which Entity Operates Percent of Real Estate Properties Leased Percent of Real Estate Properties Leased Percent of Real Estate Properties Leased Equity Method Investment, Other than Temporary Impairment Equity Method Investment, Other than Temporary Impairment Interest Costs Capitalized Interest Costs Capitalized EQUITY Stockholders' Equity Note Disclosure [Text Block] Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Company's basic and diluted (loss)earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Dispositon Fee Percentage Dispositon Fee Percentage Dispositon Fee Percentage Ownership Interest in Joint Venture Ownership Interest in Joint Venture Ownership Interest in Joint Venture Deferred Gain on Sale of Property Realized Gain Deferred percentage Realized Gain Deferred percentage Realized Gain Deferred percentage Equity Method Investment, Realized Gain (Loss) on Disposal Equity Method Investment, Realized Gain (Loss) on Disposal Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Operating Leases, Future Minimum Payments Receivable [Abstract] Schedule of Future Minimum Rental Receivable For Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] FUTURE MINIMUM RENTAL INCOME Lessor, Operating Leases [Text Block] Dispositions [Abstract] Dispositions [Abstract] Florissant [Member] Florissant [Member] Florissant [Member] Ensenada [Member] Ensenada [Member] Ensenada [Member] Topaz-Davita [Member] Topaz-Davita [Member] Topaz-Davita [Member] Morningside Marketplace [Member] Morningside Marketplace [Member] Morningside Marketplace [Member] Cochran Bypass [Member] Cochran Bypass [Member] Cochran Bypass [Member] Woodland West Marketplace [Member] Woodland West Marketplace [Member] Woodland West Marketplace [Member] Repayments of Lines of Credit Repayments of Lines of Credit Gains (Losses) on Sales of Investment Real Estate SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Alternative Minimum Tax [Member] Alternative Minimum Tax [Member] Alternative Minimum Tax [Member] Income Tax Expense (Benefit) Tax Adjustments, Settlements, and Unusual Provisions Tax Adjustments, Settlements, and Unusual Provisions Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority Required Distribution Rate To Maintain REIT Status srtr_RequiredDistributionRateToMaintainREITStatus srtr_RequiredDistributionRateToMaintainREITStatus 2019 Operating Leases, Future Minimum Payments Receivable, Current 2020 Operating Leases, Future Minimum Payments Receivable, in Two Years 2021 Operating Leases, Future Minimum Payments Receivable, in Three Years 2022 Operating Leases, Future Minimum Payments Receivable, in Four Years 2023 Operating Leases, Future Minimum Payments Receivable, in Five Years Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Total Operating Leases, Future Minimum Payments Receivable Amortization of Debt Issuance Costs Amortization of Debt Issuance Costs Interest Payable Interest Payable Schedule of Investment in Unconsolidated Joint Ventures Equity Method Investments [Table Text Block] Condensed Balance Sheet [Table Text Block] Condensed Balance Sheet [Table Text Block] Condensed Income Statement [Table Text Block] Condensed Income Statement [Table Text Block] Leases [Abstract] Lessee, Operating Lease, Term of Contract Lessor, Operating Lease, Term of Contract Operating Leases Weighted Average Remaining Term Operating Lease, Weighted Average Remaining Lease Term Security Deposit Security Deposit ASSETS Properties under development and development costs: Land Buildings Development costs Prepaid expenses and other assets, net LIABILITIES Amounts due to affiliates Deferred Costs Deferred Costs Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] SGO Joint Venture [Member] SGO Joint Venture [Member] Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Retained Earnings [Member] Retained Earnings [Member] Deferred Rent Receivables, Net Deferred Rent Receivables, Net Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Topaz Marketplace [Member] Topaz Marketplace [Member] Topaz Marketplace [Member] 400 Grove [Member] 400 Grove [Member] 400 Grove [Member] 8 Octavia [Member] 8 Octavia [Member] 8 Octavia [Member] Fulton Shops [Member] Fulton Shops [Member] Fulton Shops [Member] 450 Hayes [Member] 450 Hayes [Member] 450 Hayes [Member] Land SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land Building & Improvements SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements Cost Capitalized Subsequent to Acquisition(1) SEC Schedule III, Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs Land SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Land Building & Improvements SEC Schedule III, Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements Total (2) Accumulated Depreciation Acquisition Date SEC Schedule III, Real Estate and Accumulated Depreciation, Date Acquired Life on which Depreciation in Latest Statement of Operations is Computed(3) SEC Schedule III, Real Estate and Accumulated Depreciation, Life Used for Depreciation SEC Schedule III, Real Estate, Federal Income Tax Basis SEC Schedule III, Real Estate, Federal Income Tax Basis Deferred Costs Schedule of maturities for notes payable outstanding Long-term Debt, Fiscal Year Maturity [Abstract] 2019 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two Total (1) Long-term Debt ORGANIZATION AND BUSINESS Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Statement of Stockholders' Equity [Abstract] Shareholders' Equity Class [Axis] Shareholders' Equity Class [Axis] Fair Value by Shareholders' Equity Class [Domain] Fair Value by Shareholders' Equity Class [Domain] Total Stockholders' Equity Shareholders' Equity [Member] Accumulated Deficit Non-controlling Interests Noncontrolling Interest [Member] BALANCE BALANCE (in shares) Shares, Issued Redemption of common shares (in shares) Redemption of common shares, value Stock Dividends, Shares Stock Dividends, Shares Quarterly distributions Dividends, Cash Cumulative effect from change in accounting principle (Note 2) Net income (loss) BALANCE BALANCE (in shares)