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Note 10 - Derivative Financial Instruments (Details) (USD $) | Dec. 31, 2014 | Jun. 30, 2014
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Interest Rate Swap [Member] |  |
Note 10 - Derivative Financial Instruments (Details) [Line Items] |  |
Derivative, Notional Amount | $ 75,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Derivative, Average Fixed Interest Rate | 1.99%us-gaap_DerivativeAverageFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Foreign Exchange Contract [Member] |  |
Note 10 - Derivative Financial Instruments (Details) [Line Items] |  |
Outstanding forward contracts, unrealized gain loss | $ (100,000)sxi_OutstandingForwardContractsNetUnrealizedGainLoss / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember | $ (1,200,000)sxi_OutstandingForwardContractsNetUnrealizedGainLoss / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Details
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- Definition Information pertaining to outstanding forward contracts. + References No definition available. + Details
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Namespace Prefix: | sxi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Average fixed interest rate related to the group of interest rate derivatives. + References No definition available. + Details
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- Details
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- Details
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Balance Type: |
Period Type: |