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v3.22.2

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) | 12 Months Ended
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Mar. 31, 2022 USD ($)
Disclosure of analysis of other comprehensive income by item [text block] [Abstract] |
Currency translation adjustment net of tax |

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- Definition It represent currency translation adjustment net of tax. + References No definition available. + Details
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Namespace Prefix: | svm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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