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Balance Sheet Components - Accounts Receivable, net (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Balance Sheet Components [Abstract]    
Accounts receivable $ 220,106 $ 254,640
Allowance for doubtful accounts (81) (204)
Sales return reserve (7,414) (1,317)
Accounts receivable, net $ 212,611 $ 253,119