Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Additional Information (Detail)

v3.20.4
Revenue Recognition - Additional Information (Detail) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Revenue From Contract With Customer [Abstract]    
Receivables related to contracts with customers $ 6,232,000 $ 31,620,000
Assets related to costs to obtain or fulfill contract with customers $ 0