INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
	Apr. 02, 2015	Jun. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Intangible assets
Gross Carrying Amount		$ 1,109,068			$ 1,109,068		$ 1,109,068
Accumulated amortization		(154,148)			(154,148)		(100,074)
Total		954,920			954,920		1,008,994
Amortization of intangible assets		27,037		$ 26,731	54,074	$ 29,271
Future amortization expenses of intangible assets
2016 (remainder)		54,073			54,073
2017		108,147			108,147
2018		108,147			108,147
2019		108,147			108,147
2020		108,147			108,147
Thereafter		468,259			$ 468,259
NUCYNTA
Intangible assets
Remaining Useful Life (In years)	10 years
Zipsor
Intangible assets
Amortization of intangible assets			$ 600	$ 1,000
Product rights | NUCYNTA
Intangible assets
Remaining Useful Life (In years)					9 years
Gross Carrying Amount		1,019,978			$ 1,019,978		1,019,978
Accumulated amortization		(123,836)			(123,836)		(74,081)
Total		896,142			$ 896,142		945,897
Product rights | CAMBIA
Intangible assets
Remaining Useful Life (In years)					7 years 6 months
Gross Carrying Amount		51,360			$ 51,360		51,360
Accumulated amortization		(13,051)			(13,051)		(10,483)
Total		38,309			$ 38,309		40,877
Product rights | Lazanda
Intangible assets
Remaining Useful Life (In years)					6 years 1 month 6 days
Gross Carrying Amount		10,480			$ 10,480		10,480
Accumulated amortization		(3,396)			(3,396)		(2,814)
Total		7,084			$ 7,084		7,666
Product rights | Zipsor
Intangible assets
Remaining Useful Life (In years)					5 years 9 months 18 days
Gross Carrying Amount		27,250			$ 27,250		27,250
Accumulated amortization		(13,865)			(13,865)		(12,696)
Total		$ 13,385			$ 13,385		$ 14,554