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Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) (USD $) | 9 Months Ended |
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Mar. 31, 2015 | Jun. 30, 2014
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Fair Value | $ (809,000)us-gaap_DerivativeFairValueOfDerivativeLiability | $ (1,061,000)us-gaap_DerivativeFairValueOfDerivativeLiability
Effective Date 1 [Member] | Interest Rate Swap 1 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 5,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap1Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member |
Fixed Rate | 2.495%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap1Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member |
Maturity | May 24, 2015 |
Fair Value | (20,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap1Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member | (108,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap1Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member
Effective Date 1 [Member] | Interest Rate Swap 2 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 5,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap2Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member |
Fixed Rate | 2.495%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap2Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member |
Maturity | May 24, 2015 |
Fair Value | (20,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap2Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member | (108,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap2Member / us-gaap_RangeAxis = sxi_EffectiveDate1Member
Effective Date 2 [Member] | Interest Rate Swap 3 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 10,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap3Member / us-gaap_RangeAxis = sxi_EffectiveDate2Member |
Fixed Rate | 2.395%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap3Member / us-gaap_RangeAxis = sxi_EffectiveDate2Member |
Maturity | May 26, 2015 |
Fair Value | (19,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap3Member / us-gaap_RangeAxis = sxi_EffectiveDate2Member | (206,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap3Member / us-gaap_RangeAxis = sxi_EffectiveDate2Member
Effective Date 3 [Member] | Interest Rate Swap 4 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 5,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap4Member / us-gaap_RangeAxis = sxi_EffectiveDate3Member |
Fixed Rate | 2.34%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap4Member / us-gaap_RangeAxis = sxi_EffectiveDate3Member |
Maturity | May 26, 2015 |
Fair Value | (39,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap4Member / us-gaap_RangeAxis = sxi_EffectiveDate3Member | (100,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap4Member / us-gaap_RangeAxis = sxi_EffectiveDate3Member
Effective Date 4 [Member] | Interest Rate Swap 5 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 5,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap5Member / us-gaap_RangeAxis = sxi_EffectiveDate4Member |
Fixed Rate | 2.38%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap5Member / us-gaap_RangeAxis = sxi_EffectiveDate4Member |
Maturity | May 24, 2015 |
Fair Value | (19,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap5Member / us-gaap_RangeAxis = sxi_EffectiveDate4Member | (103,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap5Member / us-gaap_RangeAxis = sxi_EffectiveDate4Member
Effective Date 5 [Member] | Interest Rate Swap 6 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 5,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap6Member / us-gaap_RangeAxis = sxi_EffectiveDate5Member |
Fixed Rate | 1.595%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap6Member / us-gaap_RangeAxis = sxi_EffectiveDate5Member |
Maturity | Sep. 22, 2014 |
Fair Value |  | (18,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap6Member / us-gaap_RangeAxis = sxi_EffectiveDate5Member
Effective Date 6 [Member] | Interest Rate Swap 7 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 10,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap7Member / us-gaap_RangeAxis = sxi_EffectiveDate6Member |
Fixed Rate | 2.745%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap7Member / us-gaap_RangeAxis = sxi_EffectiveDate6Member |
Maturity | Mar. 15, 2016 |
Fair Value | (245,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap7Member / us-gaap_RangeAxis = sxi_EffectiveDate6Member | (418,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap7Member / us-gaap_RangeAxis = sxi_EffectiveDate6Member
Effective Date 7 [Member] | Interest Rate Swap 8 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 20,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap8Member / us-gaap_RangeAxis = sxi_EffectiveDate7Member |
Fixed Rate | 1.18%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap8Member / us-gaap_RangeAxis = sxi_EffectiveDate7Member |
Maturity | Dec. 19, 2017 |
Fair Value | (163,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap8Member / us-gaap_RangeAxis = sxi_EffectiveDate7Member |
Effective Date 7 [Member] | Interest Rate Swap 9 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 5,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap9Member / us-gaap_RangeAxis = sxi_EffectiveDate7Member |
Fixed Rate | 1.20%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap9Member / us-gaap_RangeAxis = sxi_EffectiveDate7Member |
Maturity | Dec. 19, 2017 |
Fair Value | (44,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap9Member / us-gaap_RangeAxis = sxi_EffectiveDate7Member |
Effective Date 8 [Member] | Interest Rate Swap 10 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 10,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap10Member / us-gaap_RangeAxis = sxi_EffectiveDate8Member |
Fixed Rate | 2.005%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap10Member / us-gaap_RangeAxis = sxi_EffectiveDate8Member |
Maturity | Dec. 19, 2019 |
Fair Value | (190,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap10Member / us-gaap_RangeAxis = sxi_EffectiveDate8Member |
Effective Date 9 [Member] | Interest Rate Swap 11 [Member] |  |
Note 10 - Derivative Financial Instruments (Details) - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Loss) [Line Items] |  |
Notional Amount | 15,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap11Member / us-gaap_RangeAxis = sxi_EffectiveDate9Member |
Fixed Rate | 1.46%us-gaap_DerivativeFixedInterestRate / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap11Member / us-gaap_RangeAxis = sxi_EffectiveDate9Member |
Maturity | Dec. 19, 2018 |
Fair Value | $ (50,000)us-gaap_DerivativeFairValueOfDerivativeLiability / us-gaap_DerivativeInstrumentRiskAxis = sxi_InterestRateSwap11Member / us-gaap_RangeAxis = sxi_EffectiveDate9Member |

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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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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719 + Details
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