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ACCOUNTS RECEIVABLE NET (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Accounts Receivable, Net [Abstract]    
Trade receivables $ 42,307 $ 53,081
Unbilled revenue 4,869 4,036
Other receivables 1,561 1,581
Accounts receivable, gross 48,737 58,698
Less: Allowance for doubtful accounts (246) (464)
Accounts receivable, net $ 48,491 $ 58,234