ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
Accounts payable	$ 2,544	$ 2,360
Accrued compensation	6,098	5,015
Accrued rebates and sales discounts	5,295	4,250
Allowance for product returns	6,126	10,831
Accrued contract sales organization fees	943	420
Inventory and other contract manufacturing accruals	596	2,990
Other accrued liabilities	8,686	6,712
Total accounts payable and accrued liabilities	$ 30,288	$ 32,578