Segment Information (Narrative) (Details) (Maximum [Member])	Mar. 31, 2012	Mar. 31, 2011
Other International Revenues [Member]
Segment Reporting Information [Line Items]
Percentage of revenue of total revenues	5.00%	5.00%
Consolidated Revenues [Member]
Segment Reporting Information [Line Items]
Percentage of revenue of total revenues	10.00%

The percentage of net product revenue to total net revenue from the sale of goods as of year end.

No definition available.

Name:	us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant