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ACCOUNTS RECEIVABLE NET (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Accounts Receivable, Net [Abstract]    
Trade receivables $ 44,927 $ 42,307
Unbilled revenue 4,318 4,869
Other receivables 2,372 1,561
Accounts receivable, gross 51,617 48,737
Less: Allowance for doubtful accounts (348) (246)
Accounts receivable, net $ 51,269 $ 48,491