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v3.23.1

Subsequent events - Additional information (Details) - USD ($) | 1 Months Ended | 5 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2023 | Jan. 31, 2023 | Jul. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021
2021 Option Plan |  |  |  |  |  |
Subsequent events |  |  |  |  |  |
Aggregate number of share options granted |  |  |  | 13,575,733 | 2,354,744 | 13,575,733
Exercise price per share |  |  | $ 9.70 |  | $ 9.70 | $ 9.70
Subsequent events |  |  |  |  |  |
Subsequent events |  |  |  |  |  |
Fixed monetary amount | $ 160,000 |  |  |  |  |
Subsequent events | 2021 Option Plan |  |  |  |  |  |
Subsequent events |  |  |  |  |  |
Aggregate number of share options granted |  | 63,464 |  |  |  |
Exercise price per share |  | $ 9.70 |  |  |  |

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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References No definition available. + Details
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Namespace Prefix: | exc_
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Balance Type: | credit
Period Type: | duration

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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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Period Type: | duration

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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + 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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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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