SUBSEQUENT EVENTS (Details) (Subsequent events, USD $)	0 Months Ended						3 Months Ended	6 Months Ended
	Jul. 15, 2013 Sobi Agreement XIAFLEX	Jul. 15, 2013 Sobi Agreement XIAFLEX Minimum	Jul. 15, 2013 Sobi Agreement XIAFLEX Maximum	Jul. 15, 2013 Sobi Agreement XIAFLEX European Union member countries item	Jul. 15, 2013 Sobi Agreement XIAFLEX Central Eastern Europe/Commonwealth of Independent countries item	Jul. 15, 2013 Sobi Agreement XIAFLEX Middle Eastern & North African countries item	Jun. 30, 2013 GlaxoSmithKline LLC (GSK) ProForma	Jun. 30, 2013 GlaxoSmithKline LLC (GSK) ProForma
SUBSEQUENT EVENTS
Number of countries granted to collaborative partner for right to develop and commercialize a product				28	18	22
Royalty payments based on sales for first tier (as a percent)		55.00%	65.00%
Royalty payments based on sales for second tier (as a percent)		50.00%	60.00%
Royalty payments based on sales for third tier (as a percent)		45.00%	55.00%
Percentage of decrease in royalty (as a percent)	10.00%
Maximum amount of potential sales milestone payments receivable	$ 40,000,000
Reversal of accrued post-expiration obligations							$ 1,015,000	$ 1,015,000