The amount of current finance lease receivables. [Refer: Finance lease receivables]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_CurrentFinanceLeaseReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2021-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_CurrentLeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of receivables related to finance leases.

+ References

+ Details

Name:	ifrs-full_FinanceLeaseReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2021-01-01
-Paragraph 58
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_58&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2021-01-01
-Paragraph B11D
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_B11D_a&doctype=Appendix&subtype=B
-URIDate 2021-03-24

+ Details

Name:	ifrs-full_GrossLeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

+ Details

Name:	ifrs-full_LeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of non-current finance lease receivables. [Refer: Finance lease receivables]

+ References

+ Details

Name:	ifrs-full_NoncurrentFinanceLeaseReceivables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of non-current lease liabilities. [Refer: Lease liabilities]

+ References

+ Details

Name:	ifrs-full_NoncurrentLeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of gross receivables related to finance leases.

+ References

No definition available.

+ Details

Name:	svm_GrossFinanceLeaseReceivables
Namespace Prefix:	svm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Undiscounted future interest lease liabilities.

+ References

No definition available.

+ Details

Name:	svm_UndiscountedFutureInterestLeaseLiabilities
Namespace Prefix:	svm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Undiscounted future interest lease receivables.

+ References

No definition available.

+ Details

Name:	svm_UndiscountedFutureInterestLeaseReceivables
Namespace Prefix:	svm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=ifrs-full_LeaseReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis=us-gaap_CapitalLeaseObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=svm_BetweenTwoToFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Lease Receivable [Member]
LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value [Line Items]
Total undiscounted amount	$ 186
Less future interest	(4)
Total discounted amount	182	$ 396	$ 534
Less: current portion	(182)
Non-current portion
Lease Obligation [Member]
LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value [Line Items]
Total undiscounted amount	1,343
Less future interest	(80)
Total discounted amount	1,263	$ 1,741	$ 2,069
Less: current portion	(649)
Non-current portion	614
Within a year [Member] \| Lease Receivable [Member]
LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value [Line Items]
Total undiscounted amount	186
Within a year [Member] \| Lease Obligation [Member]
LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value [Line Items]
Total undiscounted amount	677
Between 2 to 5 years [Member] \| Lease Receivable [Member]
LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value [Line Items]
Total undiscounted amount
Between 2 to 5 years [Member] \| Lease Obligation [Member]
LEASES (Details) - Schedule of Reconciliation of Company Undiscounted Cash Flows to Present Value [Line Items]
Total undiscounted amount	$ 666