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Note 19 - Subsequent Event (Details Textual) - 12 months ended Mar. 31, 2016 - Oki Sensor Device Corporation [Member] $ in Millions, ¥ in Billions	USD ($)	JPY (¥)
Revenues	$ 56.0	¥ 6.8
Standex Electronics [Member]
Revenues	$ 12.9

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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

X

- Details

Name:	dei_LegalEntityAxis=sxi_OkiSensorDeviceCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=sxi_StandexElectronicsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: