XML 76 R63.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Additional Information (Detail)
12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Operating lease description The Company leases office space and equipment, and certain office space is subleased. Management determines if a contract is a lease at the inception of the arrangement and reviews all options to extend, terminate, or purchase its right-of-use assets at the inception of the lease and accounts for these options when they are reasonably certain of being exercised.