| Weighted average share price, share options granted | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Weighted average share price, share options granted | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Promedio ponderado del precio de la acción, opciones sobre acciones otorgadas | es | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Promedio ponderado del precio de la acción, opciones sobre acciones concedidas | es | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |
| Weighted average share price, share options granted | en | http://www.xbrl.org/2003/role/terseLabel | http://www.xbrl.org/2003/role/link |