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Summary of Significant Accounting Polices (Concentration of Credit Risk) (Narrative) (Details) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Summary Of Significant Accounting Polices Concentration Of Credit Risk Narrative Details    
FDIC current limits on bank accounts per banking institution $ 250,000 $ 250,000
Company bank balances in these bank accounts exceeding the insured amount $ 13,693,000