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Financial Statement Components - Accounts Receivable, Net of Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Financial Statement Components [Abstract]    
Trade accounts receivable $ 42,987 $ 26,504
Unbilled accounts receivable 32,665 27,692
Allowance for doubtful accounts and reserve for expected credit losses (1,467) (1,203)
Other accounts receivable 976 2,250
Total accounts receivable, net $ 75,161 $ 55,243