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Summary Of Significant Accounting Policies (Allowance for Doubtful Accounts) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]      
Balance, beginning of year $ 23us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 240us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent  
Allowance for Doubtful Accounts Receivable, Write-offs 0us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs (219)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs  
Additions to allowance 64us-gaap_ProvisionForDoubtfulAccounts 2us-gaap_ProvisionForDoubtfulAccounts 0us-gaap_ProvisionForDoubtfulAccounts
Balance, quarter ended $ 87us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 23us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 240us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent