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Note 17 - Employee Benefit Plans (Details) - Company's Participation in Multiemployer Pension Plans - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 1,070	$ 1,200	$ 1,050
New England Teamsters and Trucking Industry Pension Fund [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	437	541	427
IAM National Pension Fund National Pension Plan [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 633	$ 659	$ 623

X

- Definition

Amount of contributions made to multiemployer plans by the employer. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 80



-Section 50



-Paragraph 11



-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450702-114947



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 80



-Section 50



-Paragraph 9



-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450691-114947



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 80



-Section 50



-Paragraph 5



-Subparagraph (e)(1)



-URI http://asc.fasb.org/extlink&oid=49170332&loc=SL14450657-114947

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_MultiemployerPlansLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_MultiemployerPlanNameAxis=sxi_NewEnglandTeamstersAndTruckingIndustryPensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MultiemployerPlanNameAxis=sxi_IAMNationalPensionFundNationalPensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: