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Accounts Receivable, net (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Receivables [Abstract]    
Accounts receivable $ 4,306 $ 8,697
Allowance for doubtful accounts (2,297) (1,845)
Accounts receivable, net $ 2,009 $ 6,852