Annual report pursuant to Section 13 and 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.8.0.1
Related-Party Transactions - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Related Party Transaction [Line Items]      
Due to related parties $ 1,350,000 $ 1,712,000  
Minimum net worth required 300,000,000    
Cellectis (Parent) [Member]      
Related Party Transaction [Line Items]      
Minimum net worth required $ 300,000,000    
Cellectis (Parent) [Member] | Maximum [Member]      
Related Party Transaction [Line Items]      
Threshold percentage of ownership in outstanding common stock to enact indemnification agreement 50.00%    
EURIBOR 12 [Member] | Cellectis (Parent) [Member]      
Related Party Transaction [Line Items]      
Debt instrument, basis spread on variable rate 5.00%    
Management Agreement [Member] | Cellectis (Parent) [Member]      
Related Party Transaction [Line Items]      
Related party transaction, expenses from transactions with related party $ 1,968,000 3,150,000 $ 1,884,000
Due to related parties 1,400,000    
Selling, General and Administrative [Member] | Management Agreement [Member] | Cellectis (Parent) [Member]      
Related Party Transaction [Line Items]      
Related party transaction, expenses from transactions with related party 1,811,000 2,969,000 1,704,000
Research and Development [Member] | Management Agreement [Member] | Cellectis (Parent) [Member]      
Related Party Transaction [Line Items]      
Related party transaction, expenses from transactions with related party $ 157,000 $ 181,000 $ 180,000