RECEIVABLES (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jul. 31, 2015	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net of reserves		$ 13,400	$ 12,458
Note receivable, current		47,173	46,849
Note receivable, long term		45,889	$ 45,573
Asklepion Pharmaceuticals, LLC | Asset Purchase Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of asset	$ 245,000
Discount rate of future payments to be received	2.80%
At Time Of Closing | Asset Purchase Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Present value of future payments to be received	$ 46,200
At Time Of Closing | Asklepion Pharmaceuticals, LLC | Asset Purchase Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of asset	150,000
Due On First And Second Anniversaries Of Closing | Asset Purchase Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Present value of future payments to be received	44,900
Due On First And Second Anniversaries Of Closing | Asklepion Pharmaceuticals, LLC | Asset Purchase Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of asset	$ 47,500
Interest expense | Asklepion Pharmaceuticals, LLC | Asset Purchase Agreement
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accretion on notes receivable		$ 600