COLLABORATIONS AND ALLIANCES (Detail Textuals) (USD $)	3 Months Ended		12 Months Ended	3 Months Ended	1 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Daiichi Sankyo Kinase Inhibitor Discovery Agreement	Nov. 30, 2008 Daiichi Sankyo Kinase Inhibitor Discovery Agreement Kinases Research collaboration, exclusive license and co-commercialization agreement	Dec. 31, 2010 Daiichi Sankyo Kinase Inhibitor Discovery Agreement Kinases Research collaboration, exclusive license and co-commercialization agreement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront payment received					$ 15,000,000
Term under agreement for research support payments					2 years
Extended additional term under agreement for research support payment						2 years
Research and development revenue	$ 5,661,000	$ 8,498,000	$ 47,310,000	$ 4,900,000