INVENTORY IMPAIRMENT AND OTHER NON-RECURRING CHARGES (Details) $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($) employee	Jun. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($) employee	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Non-Recurring Charges
Restructuring, Settlement and Impairment Provisions				$ 2,539			$ 32,061
Total inventory impairment and other non-recurring expense				2,539			32,061
Non-recurring charges	$ 0					$ 0
Activity for the Company's cost reduction plan obligations
Balance of accrued costs at the end of the period	706	$ 739	$ 881			881
Charges	0
Payments	(24)	(33)	(142)
Reclassifications	(670)
Balance of accrued costs at the end of the period	12	706	739			12
Additional disclosures
Accrued severance and facilities-related costs, Current								$ 12	$ 503
Restructuring accrual anticipated to be paid out
2016 (remaining three months)								7
2019								5
Total	706	739	881			881		12	881
July 2015 Restructuring Plan member
Non-Recurring Charges
Employee severance and related costs				2,500			2,500
Share-based compensation (see Note 15)				$ 36			$ 36
Number of employees reduced | employee				60			60
Employee severance costs
Activity for the Company's cost reduction plan obligations
Balance of accrued costs at the end of the period	287	294	410			410
Charges	0
Payments	(7)	(7)	(116)
Reclassifications	(268)
Balance of accrued costs at the end of the period	12	287	294			12
Restructuring accrual anticipated to be paid out
Total	287	294	410			410		$ 12	410
Facilities-related costs
Activity for the Company's cost reduction plan obligations
Balance of accrued costs at the end of the period	419	445	471			471
Charges	0
Payments	(17)	(26)	(26)
Reclassifications	(402)
Balance of accrued costs at the end of the period		419	445
Restructuring accrual anticipated to be paid out
Total	$ 419	$ 445	$ 471			$ 471			$ 471
Qsymia
Non-Recurring Charges
Inventory impairment (see Note 4)					$ 29,500
Nonrecurring transaction | Qsymia
Non-Recurring Charges
Restructuring, Settlement and Impairment Provisions							$ 29,500
Total inventory impairment and other non-recurring expense							$ 29,500