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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2020 USD ($)
Significant Accounting Policies [Line Items] |
Year founded | 2010
Impairment of long-lived assets | $ 0
Assumed dividend yield | 0.00%
Cellectis [Member] |
Significant Accounting Policies [Line Items] |
Percentage of ownership in outstanding common stock | 64.70%

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