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Related Parties - Summarized Changes of Number of Restricted and Performance Shares Granted (Detail) | 12 Months Ended
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Dec. 31, 2019 shares | Dec. 31, 2018 shares
Summary of related parties [line items] |  |
Balance on December 31, 2017 | 739,952 | 332,540
Shares granted | 1,738,660 |
Cancellation of granted shares due to termination of executive employment | (9,168) | (39,772)
Balance on December 31, 2018 | 1,738,660 | 739,952
April 9, 2018 [member] |  |
Summary of related parties [line items] |  |
Shares granted |  | 207,184
September 19, 2018 [member] |  |
Summary of related parties [line items] |  |
Shares granted |  | 160,000
September 24, 2018 [member] |  |
Summary of related parties [line items] |  |
Shares granted |  | 80,000
April 3, 2019 [member] |  |
Summary of related parties [line items] |  |
Shares granted | 567,876 |
September 2, 2019 [member] |  |
Summary of related parties [line items] |  |
Shares granted | 440,000 |

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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition Number of instruments other equity instruments cancellation of granted shares due to termination of executive employment. + References No definition available. + Details
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