XML 155 R115.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Share-Based Payment - Additional information (Detail) |  |  |  |  | 12 Months Ended
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Dec. 15, 2017 | Dec. 15, 2016 | Dec. 09, 2016 | Jun. 21, 2016 | Dec. 31, 2017 | Dec. 15, 2017 | Dec. 05, 2017 | Dec. 31, 2016
Top of range [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  | 4 years | 4 years |
Share Option [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  |  |  | 1,200 |  |  | 35,000
Share Option [Member] | Date of Grant Seven [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, date of grant |  |  |  | Jun. 21, 2016 |  |  |  |
Share based payment arrangement, shares exercised | 1,100 |  |  | 154,100 |  |  |  |
Vesting period (years) |  | 10 years |  | 10 years | 10 years |  |  |
Share Option [Member] | Date of Grant Eight [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, date of grant |  |  | Dec. 09, 2016 |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 74,960 |  |  |  |  |
Vesting period (years) |  |  | 10 years |  |  |  |  |
Share Option [Member] | Date of Grant 06/21/2016 [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, date of grant |  | 12/15/2016 |  |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | Not Later Than One Year [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 25.00% |  | 25.00% | 25.00% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | Later Than One Year and Not Later Than Two Years [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 12.50% |  | 12.50% | 12.50% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | 24 months [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 12.50% |  | 12.50% | 12.50% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | Later Than Two Years and Not Later Than Three Years [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 12.50% |  | 12.50% | 12.50% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | 36 months [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 12.50% |  | 12.50% | 12.50% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | Later Than Three Years and Not Later Than Four Years [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 12.50% |  | 12.50% | 12.50% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Seven [Member] | 48 months [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, vesting percentage |  | 12.50% |  | 12.50% | 12.50% |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | Not Later Than One Year [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 18,740 |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | Later Than One Year and Not Later Than Two Years [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 9,370 |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | 24 months [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 9,370 |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | Later Than Two Years and Not Later Than Three Years [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 9,370 |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | 36 months [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 9,370 |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | Later Than Three Years and Not Later Than Four Years [member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 9,370 |  |  |  |  |
Share Option [Member] | Top of range [member] | Date of Grant Eight [Member] | 48 months [Member] |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Share based payment arrangement, shares exercised |  |  | 9,370 |  |  |  |  |

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