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v3.23.1

Share-based Payment Arrangements - Summary of Fair Value using Trinomial Tree Model and Inputs (Detail) | 12 Months Ended
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Dec. 31, 2022 yr $ / shares | Dec. 31, 2022 yr ¥ / shares | Dec. 31, 2021 yr ¥ / shares | Dec. 31, 2020 yr ¥ / shares
Trinomial Tree Model [member] | USISH two thousand and twenty share options plan [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Share price at the grant date | ¥ / shares |  | ¥ 21.55 |  |
Exercise price | ¥ / shares |  | ¥ 21.65 |  |
Trinomial Tree Model [member] | USISH employee stock ownership restricted stock ownership plan amendment 2021 [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Share price at the grant date | $ / shares | $ 30.2 |  |  |
Exercise price | $ / shares | 30 |  |  |
Trinomial Tree Model [member] | AMPI Two Thousand And Twenty Two Share Options Plan [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Share price at the grant date | $ / shares | 7.5 |  |  |
Exercise price | $ / shares | $ 7.5 |  |  |
Binomial Method [Member] | USISH employee stock ownership restricted stock ownership plan amendment 2020 [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Share price at the grant date | ¥ / shares |  |  |  | ¥ 24.3
Expected volatility |  |  |  | 56.97%
Lock-up periods |  |  |  | 1.3
Risk free interest rate |  |  |  | 2.63%
Binomial Method [Member] | USISH employee stock ownership restricted stock ownership plan amendment 2021 [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Share price at the grant date | ¥ / shares |  |  | ¥ 14.65 |
Expected volatility |  |  | 47.15% |
Lock-up periods |  |  | 1.3 |
Risk free interest rate |  |  | 2.34% |
Bottom of range [member] | Trinomial Tree Model [member] | USISH two thousand and twenty share options plan [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Expected volatility | 48.14% | 48.14% |  |
Expected lives | 2.2 | 2.2 |  |
Risk free interest rate | 2.80% | 2.80% |  |
Bottom of range [member] | Trinomial Tree Model [member] | USISH employee stock ownership restricted stock ownership plan amendment 2021 [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Expected volatility | 65.85% | 65.85% |  |
Expected lives | 5.8 | 5.8 |  |
Risk free interest rate | 1.11% | 1.11% |  |
Bottom of range [member] | Trinomial Tree Model [member] | AMPI Two Thousand And Twenty Two Share Options Plan [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Expected volatility | 65.35% | 65.35% |  |
Expected lives | 6 | 6 |  |
Risk free interest rate | 1.15% | 1.15% |  |
Top of range [member] | Trinomial Tree Model [member] | USISH two thousand and twenty share options plan [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Expected volatility | 53.57% | 53.57% |  |
Expected lives | 4.2 | 4.2 |  |
Risk free interest rate | 2.99% | 2.99% |  |
Top of range [member] | Trinomial Tree Model [member] | USISH employee stock ownership restricted stock ownership plan amendment 2021 [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Expected volatility | 67.29% | 67.29% |  |
Expected lives | 6.8 | 6.8 |  |
Risk free interest rate | 1.15% | 1.15% |  |
Top of range [member] | Trinomial Tree Model [member] | AMPI Two Thousand And Twenty Two Share Options Plan [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |  |  |
Expected volatility | 67.78% | 67.78% |  |
Expected lives | 7 | 7 |  |
Risk free interest rate | 1.19% | 1.19% |  |

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- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2022-03-24 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2022-03-24 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2022-03-24 + Details
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