Annual report pursuant to Section 13 and 15(d)

Leases, Other Commitments, and Contingencies - Additional Information (Detail)

v3.19.1
Leases, Other Commitments, and Contingencies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2018
USD ($)
Options
Dec. 31, 2017
USD ($)
ft²
Dec. 31, 2016
USD ($)
Sep. 30, 2017
Options
Other Commitments [Line Items]        
Lease term 20 years     20 years
Number of lease extension options | Options 4     4
Extension term of lease agreement 5 years     5 years
Total rent expense under operating lease $ 200,000 $ 300,000 $ 300,000  
Proceeds from sale of land and uncompleted facility   $ 7,000,000    
Annual base rent $ 1,400,000      
Percentage of annual base rent 8.00%      
Increase in percentage of annual base rent on the sixth, eleventh and sixteenth anniversaries 7.50%      
Forward purchase commitment amount $ 12,400,000      
Corporate Headquarters [Member]        
Other Commitments [Line Items]        
Office and lab building area | ft²   40,000    
Equipment [Member]        
Other Commitments [Line Items]        
Lease term 4 years      
Restricted cash $ 1,400,000      
Maximum [Member] | Equipment [Member]        
Other Commitments [Line Items]        
Sale-leaseback that can be financed or leased 1,100,000      
Cellectis [Member]        
Other Commitments [Line Items]        
Minimum net worth required $ 300,000,000      
Cellectis [Member] | Maximum [Member]        
Other Commitments [Line Items]        
Threshold percentage of ownership in outstanding common stock to enact indemnification agreement 50.00%