| r0.c0 | Shareholding Structure/Ordinary shares | | | | ssmt:OrdinarySharesMember |
| r0.c1 | Shareholding Structure/Preference shares | | | | ssmt:PreferenceSharesMember |
| r0.c2 | Shareholding Structure/Other kinds of shares | | | | ssmt:OtherKindsOfSharesMember |
| r0.c3 | Shareholding Structure/Total | | | | ssmt:SharesMember |
| r1.c0 | Summary of shareholding structure/Ordinary shares | | | | ssmt:OrdinarySharesMember |
| r1.c1 | Summary of shareholding structure/Preference shares | | | | ssmt:PreferenceSharesMember |
| r1.c2 | Summary of shareholding structure/Other kinds of shares | | | | ssmt:OtherKindsOfSharesMember |
| r1.c3 | Summary of shareholding structure/Total | | | | ssmt:SharesMember |
| r2.c0 | Total amount of authorized share capital, if applicable/Ordinary shares | ssmt:AmountOfAuthorizedShareCapital | xbrli:monetaryItemType | instant | ssmt:OrdinarySharesMember |
| r2.c1 | Total amount of authorized share capital, if applicable/Preference shares | ssmt:AmountOfAuthorizedShareCapital | xbrli:monetaryItemType | instant | ssmt:PreferenceSharesMember |
| r2.c2 | Total amount of authorized share capital, if applicable/Other kinds of shares | ssmt:AmountOfAuthorizedShareCapital | xbrli:monetaryItemType | instant | ssmt:OtherKindsOfSharesMember |
| r2.c3 | Total amount of authorized share capital, if applicable/Total | ssmt:AmountOfAuthorizedShareCapital | xbrli:monetaryItemType | instant | ssmt:SharesMember |
| r3.c0 | Total amount of paid up share capital/Ordinary shares | ssmt:AmountOfIssuedShareCapital | xbrli:monetaryItemType | instant | ssmt:OrdinarySharesMember |
| r3.c1 | Total amount of paid up share capital/Preference shares | ssmt:AmountOfIssuedShareCapital | xbrli:monetaryItemType | instant | ssmt:PreferenceSharesMember |
| r3.c2 | Total amount of paid up share capital/Other kinds of shares | ssmt:AmountOfIssuedShareCapital | xbrli:monetaryItemType | instant | ssmt:OtherKindsOfSharesMember |
| r3.c3 | Total amount of paid up share capital/Total | ssmt:AmountOfIssuedShareCapital | xbrli:monetaryItemType | instant | ssmt:SharesMember |