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

Finance leases Property and equipment accumulated depreciation.

No definition available.

Name:	SMDM_FinanceLeasesPropertyAndEquipmentAccumulatedDepreciation
Namespace Prefix:	SMDM_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant