Annual report pursuant to Section 13 and 15(d)

Amortizable Intangible Assets - Additional Information (Detail)

v3.20.4
Amortizable Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Amortization of intangible assets $ 3.3 $ 4.6