COLLABORATIONS AND ALLIANCES (Detail Textuals 1) (USD $)	3 Months Ended								12 Months Ended					1 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Daiichi Sankyo ARQ 092 Agreement	Dec. 31, 2011 Daiichi Sankyo ARQ 092 Agreement	Nov. 30, 2011 Daiichi Sankyo ARQ 092 Agreement License agreement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Upfront payment received														$ 10,000,000
Research and development revenue	5,143,000	10,944,000	11,829,000	8,498,000	16,504,000	11,954,000	5,447,000	13,405,000	36,414,000	47,310,000	29,221,000	2,800,000	10,000,000
Deferred revenue												$ 200,000