Name:	ck0001412502_AcquisitionFeesAndExpensesNetPercentage
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amounts owed for acquisition fees to Advisor

No definition available.

Name:	ck0001412502_AcquisitionFeesOutstanding
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Advisory disposition fee sale of cap amount

No definition available.

Name:	ck0001412502_AdvisoryDispositionFeeSaleOfCapAmount
Namespace Prefix:	ck0001412502_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

The percentage of the sales price of each investment, charged for services in the effort to sell any investment.

No definition available.

Name:	ck0001412502_AdvisoryDispositionFeeSaleOfInvestments
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Fees incurred to cover the office facilities, equipment, supplies and staff required to manage the Real Estate Investment Trust (REIT).

No definition available.

Name:	ck0001412502_AdvisoryManagementFees
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amounts owed for management fees to Advisor.

No definition available.

Name:	ck0001412502_AdvisoryManagementFeesOutstanding
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The percentage of the purchase price of each property acquired, charged for services in investigating and negotiating acquisitions of investments.

No definition available.

Name:	ck0001412502_BusinessAcquisitionPurchasePriceAllocationAcquisitionFees
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amounts incurred related to the construction of residential property to a related party as of the end of the period.

No definition available.

Name:	ck0001412502_ConstructionExpenses
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The cap per acquisition for acquisition fees charged by the Advisor.

No definition available.

Name:	ck0001412502_CriteriaAcquisitionFees
Namespace Prefix:	ck0001412502_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

The maximum percentage of total project costs, charged as development fee.

No definition available.

Name:	ck0001412502_DevelopmentFeePercentage
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the lower or upper end of the range of development fees that may be incurred based on the total project costs sliding scale.

No definition available.

Name:	ck0001412502_DevelopmentFeeRangeValue
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Total development fees incurred with our Advisor.

No definition available.

Name:	ck0001412502_DevelopmentFees
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amounts owed for development fees to Advisor.

No definition available.

Name:	ck0001412502_DevelopmentFeesOutstanding
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Total disposition fees incurred with our Advisor.

No definition available.

Name:	ck0001412502_DispositionFees
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amounts owed for disposition fees to Advisor.

No definition available.

Name:	ck0001412502_DispositionFeesOutstanding
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of finance fee capped per loan.

No definition available.

Name:	ck0001412502_FinanceFeeCappedPerLoan
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The percentage of all amounts made available pursuant to any loan, refinancing (excluding rate and/or term modifications of an existing loan with the same lender), line of credit or other credit facility, charged for services related to the financing.

No definition available.

Name:	ck0001412502_FinancingFee
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Total financing fees incurred with our Advisor for loan financing and refinancing activities.

No definition available.

Name:	ck0001412502_FinancingFeesForLoanFinancingAndRefinancingActivities
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amounts owed for financing fees to Advisor

No definition available.

Name:	ck0001412502_FinancingFeesForLoanFinancingAndRefinancingOutstanding
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Management Fee Percentage Of Assets

No definition available.

Name:	ck0001412502_ManagementFeePercentageOfAssets
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Maximum Management Fee Payable In Cash Or Common Shares

No definition available.

Name:	ck0001412502_MaximumManagementFeePayableInCashOrCommonShares
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Number Of Paid Employees

No definition available.

Name:	ck0001412502_NumberOfPaidEmployees
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of operating partnership (OP) units issued in connection with acquisitions.

No definition available.

Name:	ck0001412502_OperatingPartnershipUnitsIssuedInConnectionWithAcquisitionUnits
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The value of operating partnership (OP) units issued in connection with acquisitions.

No definition available.

Name:	ck0001412502_OperatingPartnershipUnitsIssuedInConnectionWithAcquisitionValue
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Percentage of outstanding development fees as a part of hold back.

No definition available.

Name:	ck0001412502_PercentageOfDevelopmentFeesHoldBack
Namespace Prefix:	ck0001412502_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Total real estate commissions incurred with a related party.

No definition available.

Name:	ck0001412502_RealEstateCommissions
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amounts owed to related party for real estate commissions.

No definition available.

Name:	ck0001412502_RealEstateCommissionsOutstanding
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amounts owed to related party that have been withheld because of retainage provisions in a contract.

No definition available.

Name:	ck0001412502_RetentionPayableRelatedParty
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The total project cost used to calculate the development fee.

No definition available.

Name:	ck0001412502_TotalProjectCostUsedToCalculateDevelopmentFee
Namespace Prefix:	ck0001412502_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460

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

Carrying value as of the balance sheet date of obligations incurred and payable for the acquisition of merchandise, materials, supplies and services pertaining to construction projects such as a housing development or factory expansion not classified as trade payables.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Name:	us-gaap_ConstructionPayableCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The total amount of lease revenue recognized for the period for which the lessee was obligated under leasing arrangements regardless of any other events or conditions. This amount excludes contingent revenue and sublease revenue.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707

Name:	us-gaap_OperatingLeasesIncomeStatementMinimumLeaseRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

A description of what the property management fee percentage is taken against to determine the fee charged to clients.

No definition available.

Name:	us-gaap_PropertyManagementFeePercentFeeDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_RelatedPartyTransactionAxis=ck0001412502_AdvisoryAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ck0001412502_DevelopmentFeeRangeAxis=ck0001412502_RangeOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ck0001412502_DevelopmentFeeRangeAxis=ck0001412502_RangeTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ck0001412502_DevelopmentFeeRangeAxis=ck0001412502_RangeThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ck0001412502_DevelopmentFeeRangeAxis=ck0001412502_RangeFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ck0001412502_DevelopmentFeeRangeAxis=ck0001412502_RangeFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ck0001412502_SterlingManagementLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ck0001412502_GoldmarkPropertyManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ck0001412502_GoldmarkSchlossmanCommercialRealEstateServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=ck0001412502_EntityAffiliatedWithMessrsReganAndWielandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: