Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Leases, Other Commitments, and Contingencies - Additional Information (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Other Commitments [Line Items]    
Forward purchase commitment amount $ 32.7  
Equipment [Member]    
Other Commitments [Line Items]    
Lease term   4 years
Restricted cash $ 1.5