ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ACCRUED LIABILITIES
Accrued compensation	$ 13,196	$ 7,248
Royalties payable	20,555	810
Other accrued liabilities	29,180	7,640
Total accrued liabilities	$ 62,931	$ 15,698