Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Cellectis Equity Incentive Plan - Additional Information (Detail)

v3.19.1
Stock-Based Compensation - Cellectis Equity Incentive Plan - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted     554,243 2,120,347  
Stock-based compensation expense     $ 4,385 $ 12,091 $ 948
Cellectis [Member] | Equity Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average grant date fair value for stock options granted $ 17.16        
Options granted   0      
Stock-based compensation expense     $ 100 $ 400 $ 900