Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Useful Lives Of Property And Equipment

Computer equipment	3 years
Purchased and internally developed software	3 – 5 years
Leasehold improvements	Shorter of useful life or life of lease
Machinery, furniture and fixtures	3 – 6 years