Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Property Plant And Equipment Useful Life

Property and equipment are stated at cost less accumulated depreciation and are depreciated using the straight-line method over the assets’ estimated useful lives. Principal useful lives are as follows:

Furniture and fixtures	5 years
Laboratory equipment	5 years
Computer and communications equipment	3 years
Design and tooling	5 years
Machinery and equipment	7 years
Leasehold improvements	Useful life or term of lease, whichever is shorter