Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Assumptions used in Black-Scholes Model (Detail)

v3.10.0.1
Stock-Based Compensation - Summary of Assumptions used in Black-Scholes Model (Detail)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield 0.00% 0.00%
Risk-free interest rate, minimum 2.45% 1.25%
Risk-free interest rate, maximum 2.82% 2.31%
Expected volatility, minimum 40.90% 27.40%
Expected volatility, maximum 54.70% 42.50%
Cellectis (Parent) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield 0.00% 0.00%
Risk-free interest rate, minimum 0.03% 2.16%
Risk-free interest rate, maximum 0.94% 2.31%
Expected volatility, minimum 59.09% 37.50%
Expected volatility, maximum 65.64% 42.30%
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 6 years 4 months 2 days 1 year 2 months 19 days
Minimum [Member] | Cellectis (Parent) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 6 years 7 years 5 months 4 days
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 9 years 2 months 15 days 10 years
Maximum [Member] | Cellectis (Parent) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 6 years 1 month 13 days 10 years