XML 264 R74.htm IDEA: XBRL DOCUMENT
v3.22.2

ENVIRONMENTAL REHABILITATION (Details) - Schedule of Reconciliation of Obligations Associated Retirement Properties - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Schedule of Reconciliation of Obligations Associated Retirement Properties [Abstract] |  |
Balance, April 1, 2020 | $ 7,863 | $ 8,700
Reclamation expenditures | (467) | (189)
Unwinding of discount of environmental rehabilitation | 269 | 251
Revision of provision | 812 | (1,610)
Foreign exchange impact | 262 | 711
Balance, March 31, 2022 | $ 8,739 | $ 7,863

X
- Definition The amount of expense recognised due to the unwinding of the discount on provisions other than provisions from employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ExpenseDueToUnwindingOfDiscountOnProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of non-current provision for decommissioning, restoration and rehabilitation costs. [Refer: Provision for decommissioning, restoration and rehabilitation costs] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Section D Examples: disclosures -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&doctype=Illustrative%20Examples&dita_xref=IAS37_IE_D__IAS37_IE_D_TI -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2021-01-01 -Paragraph 87 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2021-en-r&anchor=para_87&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Foreign exchange impact on environmental rehabilitation. + References No definition available. + Details
Name: | svm_ForeignExchangeImpactOnEnvironmentalRehabilitation
Namespace Prefix: | svm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reclamation expenditures. + References No definition available. + Details
Name: | svm_ReclamationExpenditures
Namespace Prefix: | svm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Revision of provision. + References No definition available. + Details
Name: | svm_RevisionOfProvision
Namespace Prefix: | svm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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