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Commitments and Contingencies - Schedule of Supplemental Information Related to Leases (Details) (Parenthetical) | Mar. 31, 2020 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Finance leases Property and equipment accumulated depreciation | $ 11,918

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- Definition Finance leases Property and equipment accumulated depreciation. + References No definition available. + Details
Name: | SMDM_FinanceLeasesPropertyAndEquipmentAccumulatedDepreciation
Namespace Prefix: | SMDM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration