Significant accounting policies - Additional Information (Details)	12 Months Ended
Jun. 30, 2026 cash_generating_unit day
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage of options vest on first anniversary of grant	25.00%
Periodic vesting period for remaining percentage of options until fourth anniversary of commencement date	3 months
Intangible assets useful life	3 years
Number of cash generating unit \| cash_generating_unit	1
RSU
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period	3 years
PSU
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting period	3 years
Number of trading days \| day	5
PSU \| Market Based Performance Targets
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage	100.00%
PSU \| Non-Market Based Performance Targets
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage	50.00%
Minimum
Disclosure of terms and conditions of share-based payment arrangement [line items]
Contractual term	1 month
Minimum \| PSU
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage	0.00%
Minimum \| PSU \| Market Based Performance Targets
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage	50.00%
Maximum
Disclosure of terms and conditions of share-based payment arrangement [line items]
Contractual term	7 years
Maximum \| PSU
Disclosure of terms and conditions of share-based payment arrangement [line items]
Vesting percentage	150.00%

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amortization Of Intangible Assets Useful Life

+ References

No definition available.

+ Details

Name:	sang_AmortizationOfIntangibleAssetsUsefulLife
Namespace Prefix:	sang_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Cash Generating Units

+ References

No definition available.

+ Details

Name:	sang_NumberOfCashGeneratingUnits
Namespace Prefix:	sang_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Trading Days

+ References

No definition available.

+ Details

Name:	sang_NumberOfTradingDays
Namespace Prefix:	sang_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of vesting of stock options on the first anniversary of grant under share-based payment arrangement.

+ References

No definition available.

+ Details

Name:	sang_PercentageOfVestingOfStockOptionsUnderShareBasedPaymentArrangementOnFirstAnniversaryOfGrant
Namespace Prefix:	sang_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of periodic vesting of remaining percentage of stock options under share-based payment arrangement until the fifth anniversary of the commencement date.

+ References

No definition available.

+ Details

Name:	sang_PeriodicVestingPeriodForRemainingPercentageOfOptionsUnderShareBasedPaymentArrangement
Namespace Prefix:	sang_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Revenue Recognition, Contractual Term

+ References

No definition available.

+ Details

Name:	sang_RevenueRecognitionContractualTerm
Namespace Prefix:	sang_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period

+ References

No definition available.

+ Details

Name:	sang_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod
Namespace Prefix:	sang_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Rights, Percentage1

+ References

No definition available.

+ Details

Name:	sang_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentage1
Namespace Prefix:	sang_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ifrs-full_RestrictedShareUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=sang_PerformanceShareUnitPSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	sang_PerformanceTargetsAxis=sang_MarketBasedPerformanceTargetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	sang_PerformanceTargetsAxis=sang_NonMarketBasedPerformanceTargetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: