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Balance Sheet Details - Accounts Receivable (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Summary of accounts receivable, net    
Accounts receivable $ 48,319 $ 31,493
Allowance for doubtful accounts (501) (241)
Product return reserve (663) (508)
Accounts receivable, net $ 47,155 $ 30,744