Annual report pursuant to Section 13 and 15(d)

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

v3.19.3.a.u2
Leases, Other Commitments, and Contingencies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2019
USD ($)
ft²
Option
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Other Commitments [Line Items]      
Lease term 20 years    
Number of lease extension options | Option 4    
Extension term of lease agreement 5 years    
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 $ 50,900,000    
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%    
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    
Extension term of lease agreement 6 months    
Restricted cash $ 1,400,000