| Number of share options outstanding in share-based payment arrangement | en | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Number of share options outstanding in share-based payment arrangement at beginning of period | en | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Number of share options outstanding in share-based payment arrangement at end of period | en | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |
| The number of share options outstanding in a share-based payment arrangement. | en | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |