Name:	stho_NotesReceivableAndOtherLendingInvestmentsCurrentInPaymentStatusAndRiskRatingOfThree
Namespace Prefix:	stho_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Number of additional funded loan.

No definition available.

Name:	stho_NumberOfAdditionalFundedLoan
Namespace Prefix:	stho_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The number of loans receivable repaid during the period.

No definition available.

Name:	stho_NumberOfLoansReceivableRepaid
Namespace Prefix:	stho_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of loan funded through non cash.

No definition available.

Name:	stho_NumberOfNonCashFundedLoan
Namespace Prefix:	stho_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Proceeds from Principal Repayments on Portfolio of Assets from one loan.

No definition available.

Name:	stho_ProceedsFromPrincipalRepaymentsOnPortfolioOfAssetsFromOneLoan
Namespace Prefix:	stho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of writeoff of financing receivable, charged against allowance for credit loss.

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

Amount of credit loss expense (reversal of expense) for financing receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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