Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Estimated Useful Lives Of Property And Equipment

Property and equipment is depreciated on a straight-line basis over the estimated useful lives of the assets as follows:

Description	Estimated Useful Life
Furniture and fixtures	3-5 years
Computer equipment and software	3-5 years
Laboratory equipment	5 years
Leasehold improvements	Lesser of estimated useful life or life of lease