DEFERRED REVENUE (Details) (USD $)			1 Months Ended									1 Months Ended			1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2005 Valeant	Dec. 31, 2004 Valeant	Dec. 31, 2013 Valeant	Dec. 31, 2012 Valeant	Dec. 31, 2013 Santarus	Dec. 31, 2012 Santarus	Dec. 31, 2013 Santarus Commercialization Agreement	Dec. 31, 2012 Santarus Commercialization Agreement	Aug. 31, 2011 Santarus Commercialization Agreement	Jul. 31, 2008 Santarus Promotion Agreement	Aug. 31, 2012 Janssen	Dec. 31, 2012 Janssen	Jul. 31, 2011 Ironwood
Deferred revenue, current portion:
Deferred license revenue, current portion	$ 3,041,000	$ 3,273,000			$ 1,598,000	$ 1,598,000	$ 1,443,000	$ 1,444,000						$ 231,000
Deferred revenue, current portion	3,041,000	3,273,000
Deferred license revenue, non-current portion:
Deferred license revenue, non-current portion	12,475,000	15,516,000			10,905,000	12,503,000	1,570,000	3,013,000
Total deferred revenue	15,516,000	18,789,000			12,500,000				3,000,000	4,800,000	9,200,000
Additional information
Upfront fee received			$ 25,000,000	$ 25,000,000								$ 12,000,000	$ 10,000,000		$ 900,000