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Stock-Based Compensation - Summary of Stock-Based Compensation Granted as Deemed Dividends (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Nonemployee Restricted Stock Units [Member] | Cellectis [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Deemed dividends from grants to Cellectis employee | $ 90 | $ (289) | $ 1,168

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- Definition Deemed Dividend (Deficit). + References No definition available. + Details
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Namespace Prefix: | clxt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AwardTypeAxis=clxt_NonemployeeRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=clxt_CellectisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |