Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v3.8.0.1
Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Omnibus Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense $ 9,191   $ 9,634  
IPO [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense     $ 5,600  
IPO [Member] | Omnibus Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Completion date of initial public offering     July 25, 2017  
Compensation expense 5,600   $ 5,600  
Nonemployee Restricted Stock Units [Member] | Omnibus Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense 385   393  
Cellectis (Parent) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense 98 $ 212 347 $ 807
Cellectis (Parent) [Member] | Nonemployee Restricted Stock Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividends $ 2,769   $ 2,838