Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Stock-Based Compensation - Summary of Assumptions used in Black-Scholes Model (Detail)
3 Months Ended
Mar. 31, 2018
Mar. 31, 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% 1.28%
Risk-free interest rate, maximum 2.72%  
Expected volatility, minimum 40.90% 25.00%
Expected volatility, maximum 53.70%  
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% 0.00%
Risk-free interest rate, maximum 0.94% 0.42%
Expected volatility, minimum 59.09% 59.80%
Expected volatility, maximum 65.64% 63.20%
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 6 years 5 months 16 days 5 years 9 months
Minimum [Member] | Cellectis (Parent) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 6 years 6 years 1 month 9 days
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life (in years) 9 years 2 months 16 days 6 years 2 months 30 days
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 6 years 1 month 13 days