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GOVERNMENT FEES AND OTHER TAXES (Details) - Schedule of Government Fees and Other Taxes Consist - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Schedule of Government Fees and Other Taxes Consist [Abstract]
Government fees	$ 69	$ 63
Other taxes	2,574	2,311
Total government fees and other taxes consist	$ 2,643	$ 2,374

X

- Definition

The amount of tax expense exclusive of income tax expense.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 85
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_85&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_TaxExpenseOtherThanIncomeTaxExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Government fees.

+ References

No definition available.

+ Details

Name:	svm_GovernmentFees
Namespace Prefix:	svm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Other taxes.

+ References

No definition available.

+ Details

Name:	svm_OtherTaxes
Namespace Prefix:	svm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	svm_ScheduleOfGovernmentFeesAndOtherTaxesConsistAbstract
Namespace Prefix:	svm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration