BUSINESS COMBINATIONS (Details) - USD ($) $ / shares in Units, $ in Thousands					3 Months Ended			6 Months Ended	9 Months Ended		12 Months Ended
	Apr. 02, 2015	Dec. 17, 2013	Jul. 29, 2013	Jun. 21, 2012	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Purchase price consideration
Cash Paid									$ 1,050,000
Amortization expense					$ 27,013		$ 2,540		56,284	$ 7,621
Pro forma financial information (unaudited)
Net revenues					104,856		51,485		231,564	195,762
Senior Secured Notes
Purchase price consideration
Principal amount	$ 575,000				575,000			$ 575,000	575,000
Proceeds from the issuance of debt	562,000
NUCYNTA
Purchase price consideration
Cash Paid	1,050,000
Rebates payable by seller	(10,466)
Total Purchase Consideration	1,039,534
Fair values of tangible and identifiable intangible assets acquired and liabilities assumed
Intangible asset - acquired entity product rights	1,019,489
Inventories	11,590
Manufacturing Equipment	8,455
Estimated fair value of the assets acquired	$ 1,039,534
Estimated useful life of intangible asset	10 years
Pro forma financial information (unaudited)
Pro forma revenues					104,856		92,793		276,522	322,336
Pro forma net loss					$ (11,785)		$ (36,526)		$ (45,877)	$ (58,609)
Pro forma net income per share - basic (in dollars per share)					$ (0.20)		$ (0.62)		$ (0.77)	$ (1.01)
Pro forma net income per share - diluted (in dollars per share)					$ (0.20)		$ (0.62)		$ (0.77)	$ (1.01)
Net revenues					$ 64,900			$ 121,600
NUCYNTA | Selling general and administrative expense
Fair values of tangible and identifiable intangible assets acquired and liabilities assumed
Non-recurring transaction costs					9,700				$ 12,100
NUCYNTA | Senior Secured Notes
Purchase price consideration
Proceeds from the issuance of debt	$ 550,000
CAMBIA
Purchase price consideration
Cash Paid		$ 48,700
Contingent consideration payable		10,000
Fair Value of contingent consideration									1,400		$ 1,200
Fair values of tangible and identifiable intangible assets acquired and liabilities assumed
Estimated fair value of the assets acquired		49,700
CAMBIA | Contingent Consideration Liability
Purchase price consideration
Fair Value of contingent consideration		$ 1,000
Lazanda
Purchase price consideration
Cash Paid			$ 4,000
Contingent consideration payable			15,000
Fair Value of contingent consideration									12,000		11,200
Fair values of tangible and identifiable intangible assets acquired and liabilities assumed
Estimated fair value of the assets acquired			12,000
Lazanda | Contingent Consideration Liability
Purchase price consideration
Fair Value of contingent consideration			$ 8,000
Zipsor
Purchase price consideration
Cash Paid				$ 26,400
Contingent consideration payable				5,000
Fair Value of contingent consideration									$ 1,400		$ 1,800
Amortization expense					$ 600	$ 1,000
Fair values of tangible and identifiable intangible assets acquired and liabilities assumed
Estimated fair value of the assets acquired				27,700
Zipsor | Intangible Assets
Fair values of tangible and identifiable intangible assets acquired and liabilities assumed
Fair Value of intangible assets				27,200
Zipsor | Contingent Consideration Liability
Purchase price consideration
Fair Value of contingent consideration				$ 1,300