Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.19.3.a.u2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2019
USD ($)
Significant Accounting Policies [Line Items]  
Entity Incorporation, State or Country Code DE
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 68.90%