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Convertible Debt At Fair Value (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 01, 2017
Mar. 16, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Debt Instrument [Line Items]            
Gain (loss) on derivatives and convertible debt     $ 227,000 $ 162,000 $ 402,000 $ 6,279,000
6.25% Convertible Promissory Note [Member]            
Debt Instrument [Line Items]            
Interest rate   6.25% 6.25%   6.25%  
Principal amount   $ 1,012,000        
Number of shares of common stock debt can convert into 97,269 97,269        
Maximum ownership percentage of voting stock upon debt conversion   49.00%        
Gain (loss) on derivatives and convertible debt     $ 25,000 $ 208,000 $ 265,000 $ (179,000)