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Note 10 - Derivative Financial Instruments (Details) (USD $)	Mar. 31, 2015	Jun. 30, 2014
Interest Rate Swap [Member]
Note 10 - Derivative Financial Instruments (Details) [Line Items]
Derivative, Notional Amount	$ 90,000,000invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Derivative, Average Fixed Interest Rate	1.91%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)	$ 500,000sxi_OutstandingForwardContractsNetUnrealizedGainLoss / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember	$ (1,200,000)sxi_OutstandingForwardContractsNetUnrealizedGainLoss / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_ForeignExchangeContractMember

X

- 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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X

- Details

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X

- Definition

Information pertaining to outstanding forward contracts.

+ References

No definition available.

+ Details

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X

- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

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X

- Details

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- Details

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