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ACCOUNTS AND OTHER RECEIVABLES, NET (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
ACCOUNTS AND OTHER RECEIVABLES, NET [Abstract]    
Trade receivables $ 13,142 $ 18,056
Unbilled receivables 511 0
Due from employees 21 41
Allowance for doubtful accounts and commission adjustments (4,546) (4,872)
Accounts and other receivables, net $ 9,128 $ 13,225