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

Geographic and Customer Information - Summary of Reportable Segments (Parenthetical) (Detail)

v3.21.1
Geographic and Customer Information - Summary of Reportable Segments (Parenthetical) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Germany [Member]      
Segment Reporting Information [Line Items]      
Revenues $ 3,635 $ 983 $ 51
United States [Member]      
Segment Reporting Information [Line Items]      
Increase decrease in revenues from contract with customer $ 14,800