Quarterly report pursuant to Section 13 or 15(d)

Related-Party Transactions - Additional Information (Detail)

v3.8.0.1
Related-Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Related Party Transaction [Line Items]      
Due to related parties $ 742,000   $ 1,350,000
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 $ 580,000 $ 412,000  
Due to related parties 742,000   $ 1,350,000
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 535,000 380,000  
Research and Development [Member] | Management Agreement [Member] | Cellectis (Parent) [Member]      
Related Party Transaction [Line Items]      
Related party transaction, expenses from transactions with related party $ 45,000 $ 32,000