Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.8.0.1
Commitments and Contingencies - Additional Information (Detail)
12 Months Ended
Sep. 06, 2017
USD ($)
ft²
Options
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Other Commitments [Line Items]        
Operating lease expiration date   2018-05    
Total rent expense under operating lease   $ 270,000 $ 271,000 $ 272,000
Sale-leaseback transaction date   Sep. 06, 2017    
Cash received upon sale of land and other improvements to third party $ 7,000,000 $ 6,957,000    
Lease term 20 years      
Number of lease extension options | Options 4      
Extension term of lease agreement 5 years      
Annual base rent expense   490,000    
Annual base rent   $ 1,400,000    
Percentage of annual base rent   8.00%    
Minimum net worth required   $ 300,000,000    
Gross property and equipment   15,636,000 $ 11,726,000  
Financing lease obligation   10,148,000    
Interest expense related to finance lease   200,000    
Forward purchase commitment amount   1,600,000    
Corporate Headquarters [Member]        
Other Commitments [Line Items]        
Office and lab building area | ft² 40,000      
Assets Under Construction Held Under Finance Lease [Member]        
Other Commitments [Line Items]        
Gross property and equipment   3,100,000    
Cellectis (Parent) [Member]        
Other Commitments [Line Items]        
Minimum net worth required   $ 300,000,000    
Cellectis (Parent) [Member] | Maximum [Member]        
Other Commitments [Line Items]        
Threshold percentage of ownership in outstanding common stock to enact indemnification agreement   50.00%