Post-effective amendment to a registration statement that is not immediately effective upon filing

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

v3.21.2
Related Party Balances And Transactions - Schedule of Related Party Transactions (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transactions [Abstract]              
Revenues $ 749 $ 794 $ 1,151 $ 1,226 $ (12,014) $ 1,002 $ 51
Research & Development Expenses $ 40 $ 28 $ 47 $ 65