Name:	strt_BlendedFederalStatutoryTaxRate
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Data Type:	num:percentItemType
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Period Type:	duration

Discrete net tax benefit recorded as a result of the 2017 Tax Cuts and Jobs Act, including the change in measurement of deferred tax assets and liabilities, the on-time transition tax on non-previously taxed post-1986 accumulated foreign earnings, and the change in our annualized effective tax rate.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Income tax.

No definition available.

Name:	strt_IncomeTaxLineItems
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Data Type:	xbrli:stringItemType
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The number of foreign subsidiaries for which the assertion regarding the permanent reinvestment of earnings was changed during the period - such earnings are no longer considered permanently reinvested.

No definition available.

Name:	strt_NumberOfForeignSubsidiariesForWhichEarningsAreNoLongerConsideredPermanentlyReinvested
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Period, in years, over which the one-time transition tax on repatriated earnings of foreign subsidiaries is payable.

No definition available.

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Data Type:	xbrli:durationItemType
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Percentage of domestic Federal statutory tax rate applicable to pretax income (loss) effective January 1, 2018, which rate impact is included in fiscal filers current fiscal period annual effective tax rate, as a result of the 2017 Tax Cut and Jobs Act.

No definition available.

Name:	strt_USFederalStatutoryTaxRateEffectiveJanuary12018ImpactingFiscalFilersCurrentPeriodAnnualEffectiveTaxRate
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Data Type:	num:percentItemType
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Period Type:	duration

Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319

Name:	us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of foreign earnings repatriated from subsidiaries outside the country of domicile.

No definition available.