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| | | |
| | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
|
| | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
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| | concept | ssmt:NumberOfSharesSubjectToPaymentsWhollyInCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | concept | ssmt:NumberOfSharesSubjectToPaymentsWhollyInCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | concept | ssmt:NumberOfSharesSubjectToPaymentsWhollyInCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | concept | ssmt:NumberOfSharesSubjectToPaymentsWhollyInCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
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| | concept | ssmt:NumberOfSharesSubjectToPaymentOtherwiseThanCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | concept | ssmt:NumberOfSharesSubjectToPaymentOtherwiseThanCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | concept | ssmt:NumberOfSharesSubjectToPaymentOtherwiseThanCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | concept | ssmt:NumberOfSharesSubjectToPaymentOtherwiseThanCash | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
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| | concept | ssmt:NumberOfSharesIssued | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | concept | ssmt:NumberOfSharesIssued | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | concept | ssmt:NumberOfSharesIssued | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | concept | ssmt:NumberOfSharesIssued | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
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| | concept | ssmt:OtherDetailsOnShareCapitalAbstract | y | | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | concept | ssmt:OtherDetailsOnShareCapitalAbstract | y | | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | concept | ssmt:OtherDetailsOnShareCapitalAbstract | y | | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | concept | ssmt:OtherDetailsOnShareCapitalAbstract | y | | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
|
| | concept | ssmt:NumberOfSharesForfeited | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | concept | ssmt:NumberOfSharesForfeited | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | concept | ssmt:NumberOfSharesForfeited | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | concept | ssmt:NumberOfSharesForfeited | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
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| | concept | ssmt:NumberOfSharesHeldAsTreasuryShares | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OrdinarySharesMember | x |
| | concept | ssmt:NumberOfSharesHeldAsTreasuryShares | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:PreferenceSharesMember | x |
| | concept | ssmt:NumberOfSharesHeldAsTreasuryShares | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:OtherKindsOfSharesMember | x |
| | concept | ssmt:NumberOfSharesHeldAsTreasuryShares | y | | measure | xbrli:shares | y | | ssmt:TypeOfSharesAxis | ssmt:SharesMember | x |
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