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Options and RSUs granted during the year (Detail) - shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2022
RSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 18,408
RSUs | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 3,168
RSUs | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 5,261
RSUs | Share-based Compensation Award, Tranche Three [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 596
RSUs | Share-Based Payment Arrag |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 123
RSUs | Share-Based Payment Arrangement, Tranche Five |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 79
Options | Share-based Compensation Award, Tranche Three [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Employee Performance Based Stock Option [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 86,160
Employee Performance Based Stock Option [Member] | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 16,415
Employee Performance Based Stock Option [Member] | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 64,195
Employee Performance Based Stock Option [Member] | Share-based Compensation Award, Tranche Three [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 3,100
Employee Performance Based Stock Option [Member] | Share-Based Payment Arrag |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 2,210
Employee Performance Based Stock Option [Member] | Share-Based Payment Arrangement, Tranche Five |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 240
Employee Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 177,486
Employee Stock | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 16,415
Employee Stock | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 69,361
Employee Stock | Share-based Compensation Award, Tranche Three [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 3,100
Employee Stock | Share-Based Payment Arrag |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 2,210
Employee Stock | Share-Based Payment Arrangement, Tranche Five |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 240
Share-Based Payment Arrangement |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 91,326
Performance Based Restricted Stock Unit [Member] | Option Grant Contingent upon Continued Employment or Service as a Director and Achievement of Performance Metric |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 3,168
Performance Based Restricted Stock Unit [Member] | Option Grant Solely Contingent upon Continued Employment or Continued Service as a Director |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 5,215
Performance Based Restricted Stock Unit [Member] | Share-based Compensation Award, Tranche Three [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 596
Performance Based Restricted Stock Unit [Member] | Share-Based Payment Arrag |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 25.00%
Granted (Shares) |  | 123
Performance Based Restricted Stock Unit [Member] | Share-Based Payment Arrangement, Tranche Five |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Percentage of options vesting rights |  | 50.00%
Granted (Shares) |  | 79
2014 Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 115,270
Granted (Shares) |  | 0
2014 Plan | RSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 0
2014 Plan | Employee Performance Based Stock Option [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 57,635
2014 Plan | Employee Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 57,635
2014 Plan | Performance Based Restricted Stock Unit [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 0
2018 Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 62,216
Granted (Shares) |  | 18,408
2018 Plan | RSUs |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) | 16,864 | 9,227
2018 Plan | Employee Performance Based Stock Option [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 28,525
2018 Plan | Employee Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 33,691
2018 Plan | Performance Based Restricted Stock Unit [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (Shares) |  | 9,181

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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