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SCHEDULE OF RESERVE FOR SALES RETURNS (Details) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Reserve For Sales Returns |  |  |  |
Reserve for sales returns at beginning of the year | $ 960,000 | $ 1,224,000 | $ 1,224,000 | $ 896,000
Provision for estimated sales returns | 4,020,000 | 4,187,000 | 3,881,000 | 5,771,000
Sales returns received | (2,058,000) | (2,445,000) | (4,145,000) | (5,443,000)
Reserve for sales returns at end of the period | $ 2,922,000 | $ 2,966,000 | $ 960,000 | $ 1,224,000

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

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- Definition Provision for estimated sales returns. + References No definition available. + Details
Name: | SMDM_ProvisionForEstimatedSalesReturns
Namespace Prefix: | SMDM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Reserve for sales returns. + References No definition available. + Details
Name: | SMDM_ReserveForSalesReturn
Namespace Prefix: | SMDM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Sales returns received. + References No definition available. + Details
Name: | SMDM_SalesReturnsReceived
Namespace Prefix: | SMDM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration