Name:	smdm_OperatingLossCarryForwardsCurrent
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The sum of domestic, foreign and state and local operating loss carryforwards expiring in the fifth fiscal year following the latest fiscal year, before tax effects, available to reduce future taxable income under enacted tax laws.

No definition available.

Name:	smdm_OperatingLossCarryForwardsInFiveYears
Namespace Prefix:	smdm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The sum of domestic, foreign and state and local operating loss carryforwards expiring in the fourth fiscal year following the latest fiscal year, before tax effects, available to reduce future taxable income under enacted tax laws.

No definition available.

Name:	smdm_OperatingLossCarryForwardsInFourYears
Namespace Prefix:	smdm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The sum of domestic, foreign and state and local operating loss carryforwards expiring after the fifth fiscal year following the latest fiscal year, before tax effects, available to reduce future taxable income under enacted tax laws.

No definition available.

Name:	smdm_OperatingLossCarryForwardsInSixYearsThereafter
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The sum of domestic, foreign and state and local operating loss carryforwards expiring in the third fiscal year following the latest fiscal year, before tax effects, available to reduce future taxable income under enacted tax laws.

No definition available.

Name:	smdm_OperatingLossCarryForwardsInThreeYears
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The sum of domestic, foreign and state and local operating loss carryforwards expiring in the second fiscal year following the latest fiscal year , before tax effects, available to reduce future taxable income under enacted tax laws.

No definition available.

Name:	smdm_OperatingLossCarryForwardsinTwoYears
Namespace Prefix:	smdm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	smdm_ScheduleOfOperatingLossCarryForwardsLineItems
Namespace Prefix:	smdm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319