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Note 15 - Discontinued Operations - Assets and Liabilities Related to Discontinued Operations (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Jun. 30, 2015
--- | --- | ---
Current assets |  | $ 23
Non-current assets | 14 | 3,014
Current liabilities | 1,204 | 1,383
Non-current liabilities | $ 55 | $ 896

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- Definition Current assets of discontinued operation. + References No definition available. + Details
Name: | sxi_AssetsOfDiscontinuedOperationCurrent
Namespace Prefix: | sxi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Non-current assets of discontinued operation. + References No definition available. + Details
Name: | sxi_AssetsOfDiscontinuedOperationNoncurrent
Namespace Prefix: | sxi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Accrued liabilities for the discontinued operation. + References No definition available. + Details
Name: | sxi_DiscontinuedOperationAccruedLiabilities
Namespace Prefix: | sxi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Non-current liabilities of the discontinued operation. + References No definition available. + Details
Name: | sxi_LiabilitiesOfDiscontinuedOperationsNoncurrent
Namespace Prefix: | sxi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant