XML 54 R43.htm IDEA: XBRL DOCUMENT
v3.20.4

Commitments and Contingencies - Schedule of Supplemental Information Related to Leases (Details) (Parenthetical) | Dec. 31, 2020 USD ($)
--- | ---
Commitments and Contingencies Disclosure [Abstract] |
Finance leases Property and equipment accumulated depreciation | $ 16,582

X
- 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

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