Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2015	Jun. 30, 2014
Current Year Restructuring Initiatives [Member]
Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives [Line Items]
Restructuring liabilities, period start	$ 0
Additions	3,166
Payments	(2,782)
Restructuring liabilities, period end	384	$ 0
Prior Year Initiatives [Member]
Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives [Line Items]
Restructuring liabilities, period start	555	10
Additions	277	4,579
Payments	(832)	(4,034)
Restructuring liabilities, period end		555
Involuntary Employee Severance And Benefit Costs [Member] \| Current Year Restructuring Initiatives [Member]
Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives [Line Items]
Restructuring liabilities, period start	0
Additions	847
Payments	(769)
Restructuring liabilities, period end	78	0
Involuntary Employee Severance And Benefit Costs [Member] \| Prior Year Initiatives [Member]
Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives [Line Items]
Restructuring liabilities, period start	555	10
Additions	11	1,528
Payments	(566)	(983)
Restructuring liabilities, period end		555
Other Restructuring [Member] \| Current Year Restructuring Initiatives [Member]
Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives [Line Items]
Restructuring liabilities, period start	0
Additions	2,319
Payments	(2,013)
Restructuring liabilities, period end	306	0
Other Restructuring [Member] \| Prior Year Initiatives [Member]
Note 16 - Restructuring (Details) - Summary of Activity in Reserves Related to Restructuring Initiatives [Line Items]
Additions	266	3,051
Payments	$ (266)	$ (3,051)

No definition available.

Name:	sxi_Note16RestructuringDetailsSummaryofActivityinReservesRelatedtoRestructuringInitiativesLineItems
Namespace Prefix:	sxi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

+ Details

Name:	us-gaap_PaymentsForRestructuring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

+ Details

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

+ References

+ Details

Name:	us-gaap_RestructuringReservePeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RestructuringPlanAxis=sxi_CurrentYearRestructuringInitiativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringPlanAxis=sxi_PriorYearInitiativesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=sxi_InvoluntaryEmployeeSeveranceAndBenefitCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_OtherRestructuringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: