Nature Of Business And Summary Of Significant Accounting Policies (Schedule Of Property And Equipment, Estimated Useful Lives) (Details)	12 Months Ended
Dec. 31, 2011
Laboratory Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives, years	5
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives, years	5
Computers, Software And Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives, years	3

The average useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLifeAverage
Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration