Name:	smdm_OperatingLossCarryForwardsCurrent
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 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
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 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
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 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

The sum of domestic, foreign and state and local operating loss carryforwards, 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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 48

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.