Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Related Party Balances And Transactions - Schedule of Related Party Transactions (Detail)

v3.21.1
Related Party Balances And Transactions - Schedule of Related Party Transactions (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transactions [Abstract]      
Revenues (net revenues) $ (12,014) $ 1,002 $ 51