ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
Accounts payable	$ 2,232	$ 2,360
Accrued compensation	7,077	5,015
Accrued rebates and sales discounts	8,594	4,250
Allowance for product returns	10,278	10,831
Accrued contract sales organization fees	962	420
Accruals for Inventory	87	2,990
Royalty payable to PDL	6,902
Other accrued liabilities	5,705	6,712
Total accounts payable and accrued liabilities	$ 41,837	$ 32,578