Assumed Dividend Yield

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- Definition

Significant accounting policies.

+ References

No definition available.

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- Definition

State or Country Name where an entity is incorporated

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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- Definition

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

+ References

No definition available.

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Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Significant Accounting Policies [Line Items]
Place of incorporation	Delaware
Impairment of long-lived assets	$ 0
Assumed dividend yield	0.00%
Income tax expense (benefit)	$ 0	$ 0	$ 0
Accounting Standards Update 2016-09 [Member]
Significant Accounting Policies [Line Items]
Income tax expense (benefit)	800,000
Net impact of adoption	$ 0
Cellectis [Member]
Significant Accounting Policies [Line Items]
Percentage of ownership in outstanding common stock	69.50%