Annual report pursuant to Section 13 and 15(d)

ACCRUED LIABILITIES (Details)

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ACCRUED LIABILITIES (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Salaries and employee benefits $ 10,289 $ 10,670
Sales, use and property tax (See Note 14) 3,367 2,376
Convention and meeting costs 4,970 5,129
Other 6,354 6,225
Total $ 24,980 $ 24,400