ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accounts payable	$ 10,904	$ 10,832
Accrued compensation and related liabilities	29,975	27,655
Accrued interest	102	111
Accrued taxes	4,574	5,725
Accrued legal	596	490
Accrued audit	750	343
Accrued warranties	1,243	913
Accrued royalties	2,527	2,600
Other	5,366	4,394
Total	$ 56,037	$ 53,063