Subsequent events - Additional Information (Detail)	Jun. 03, 2022	May 20, 2022
ADR [Member] \| Subsequent Event [Member]
Subsequent Events [Line Items]
Number of shares for each depository receipt	4.5	0.75

The number of underlying shares represented by one American Depository Receipt (ADR) or Global Depository Receipt (GDR). A value of '3' means that one ADR represents 3 underlying shares. If one underlying share represents 2 ADR's then the value would be represented as '0.5'.

No definition available.

Name:	dei_EntityListingDepositoryReceiptRatio
Namespace Prefix:	dei_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant