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Balance Sheet Components (Components Of Other Long-Term Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Balance Sheet Components [Abstract]    
Receivable from Existing Landlord   $ 5,000
Rent deposits and tenant improvements for O'Brien building $ 9,641 2,160
Other 172 358
Other long-term assets $ 9,813 $ 7,518