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Stock-Based Compensation - Summary of Stock-Based Compensation Granted as Deemed Dividends (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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	$ 289	$ 1,168	$ 1,358

X

- Definition

Deemed Dividend (Deficit).

+ References

No definition available.

+ Details

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X

- 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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X

- Details

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Period Type:

X

- Details

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Period Type: