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Balance Sheet Details - Accounts Receivable, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Balance Sheet Related Disclosures [Abstract]    
Accounts receivable $ 19,870 $ 27,639
Less allowance for doubtful accounts (1,358) (769)
Accounts receivables, net $ 18,512 $ 26,870