Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.8.0.1
Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 06, 2017
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Other Commitments [Line Items]              
Operating lease expiration date         2018-05    
Total rent expense under operating lease     $ 65 $ 63 $ 195 $ 206  
Lease term 20 years 20 years          
Annual base rent expense $ 490       490    
Estimated annual base rent $ 1,480       $ 1,480    
Percentage of annual base rent 8.00%       8.00%    
Due to related parties   $ 3,319 3,319   $ 3,319   $ 1,712
Forward purchase commitment amount         1,600    
Management Agreement [Member] | Cellectis (Parent) [Member]              
Other Commitments [Line Items]              
Due to related parties   $ 3,300 $ 3,300   $ 3,300