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Stated Capital - Additional Information (Detail)
Aug. 20, 2020
Disclosure of classes of share capital [line items]  
Percentage of authorised but unissued stated capital as percentage of issued stated capital 5.00%
Top of range [member]  
Disclosure of classes of share capital [line items]  
Buy back of ordinary shares during any financial year as percentage of issued share capital 20.00%
Top of Range Issued Share Capital [member]  
Disclosure of classes of share capital [line items]  
Percentage of authorised but unissued stated capital as percentage of issued stated capital 5.00%