Segment Information (Details)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2012 Amerisource Bergen Corporation [Member]	Jun. 30, 2011 Amerisource Bergen Corporation [Member]	Jun. 30, 2012 Amerisource Bergen Corporation [Member]	Jun. 30, 2011 Amerisource Bergen Corporation [Member]	Jun. 30, 2012 Cardinal Health Inc [Member]	Sep. 30, 2011 Cardinal Health Inc [Member]	Jun. 30, 2012 Cardinal Health Inc [Member]	Jun. 30, 2011 Cardinal Health Inc [Member]	Jun. 30, 2012 Mckesson Corporation [Member]	Jun. 30, 2011 Mckesson Corporation [Member]	Jun. 30, 2012 Mckesson Corporation [Member]	Jun. 30, 2011 Mckesson Corporation [Member]
Percent of Total Revenue to Major Customers
Percentage of total product revenue	32.00%	39.00%	32.00%	33.00%	34.00%	40.00%	34.00%	36.00%	26.00%	11.00%	26.00%	22.00%