XML 77 R66.htm IDEA: XBRL DOCUMENT
v3.20.4

Reserves - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Allowance for Doubtful Accounts [Member] |  |
Balance at Beginning of Year | $ 51,096 | $ 82,102
Charged to Costs and Expenses | 303,843 | 411,862
Reduction to Allowance for Write off | (15,303) | (31,200)
Credited to Costs and Expenses | (2,175) | (411,668)
Balance at End of Year | 337,461 | 51,096
Inventory Reserve [Member] |  |
Balance at Beginning of Year | 254,000 | 280,000
Charged to Costs and Expenses | 398,730 | 100,000
Reduction to Allowance for Write off | (218,730) | (44,220)
Credited to Costs and Expenses |  | (81,780)
Balance at End of Year | $ 434,000 | $ 254,000

X
- Definition Reduction to Allowance for Write off. + References No definition available. + Details
Name: | SMDM_ReductionToAllowanceForWriteOff
Namespace Prefix: | SMDM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, credited to costs and expenses. + References No definition available. + Details
Name: | SMDM_ValuationAllowancesAndReservesCreditedToCostsAndExpenses
Namespace Prefix: | SMDM_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesBalance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
Name: | us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_AllowanceForCreditLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ValuationAllowancesAndReservesTypeAxis=us-gaap_InventoryValuationReserveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |