Note 17 - Related Party Transaction (Details Textual) - Huhui Supply Agreement [Member] $ in Thousands	12 Months Ended
Dec. 31, 2015 USD ($)	Dec. 31, 2014 MWh
Related Party Transaction, Agreement Term		1 year
Related Party Transaction, Automatic Renewal Additional Term		1 year
Zhangjiagang Huhui Segpv Co Ltd [Member]
Related Party Transaction, Minimum Square Meters Transaction \| MWh		535
Related Party Transaction, Deposit Percentage on Minimum Amount		10.00%
Related Party Transaction, Notice Period Prior to End of Current Term		90 days
Zhangjiagang Huhui Segpv Co Ltd [Member] \| Accrued Liabilities [Member]
Related Party Transaction, Client Deposit Received from Related Party \| $	$ 1,148

The term of the related party transaction agreement.

No definition available.

Name:	stri_RelatedPartyTransactionAgreementTerm
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Period Type:	duration

The term of the related party automatic renewal in the absence of termination.

No definition available.

Name:	stri_RelatedPartyTransactionAutomaticRenewalAdditionalTerm
Namespace Prefix:	stri_
Data Type:	xbrli:durationItemType
Balance Type:	na
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Represents the information pertaining to amount as a client deposit received from related party.

No definition available.

Name:	stri_RelatedPartyTransactionClientDepositReceivedFromRelatedParty
Namespace Prefix:	stri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Represents the information pertaining to deposit percentage on minimum amount.

No definition available.

Name:	stri_RelatedPartyTransactionDepositPercentageOnMinimumAmount
Namespace Prefix:	stri_
Data Type:	num:percentItemType
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Represents the information pertaining to minimum encapsulants transaction.

No definition available.

Name:	stri_RelatedPartyTransactionMinimumSquareMetersTransaction
Namespace Prefix:	stri_
Data Type:	num:energyItemType
Balance Type:	na
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Represents the information pertaining to notice period prior to end of current term.

No definition available.

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Namespace Prefix:	stri_
Data Type:	xbrli:durationItemType
Balance Type:	na
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Name:	us-gaap_RelatedPartyTransactionAxis=stri_HuhuiSupplyAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: