Quarterly report pursuant to Section 13 or 15(d)

Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details)

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Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details) - $ / shares
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Warrants [Abstract]    
Number of warrants, Outstanding 7,099,609 5,452,691
Weigted average exercise price, Outstanding $ 4.55 $ 4.92
Number of warrants, issued
Weighted average exercise price, Issued
Number of warrants, Exercised (845,930)
Weighted average exercise price, Exercised $ 3.36
Number of warrants, Expired
Weighted average exercise price, Expired
Number of warrants, Outstanding 7,099,609 4,606,761
Weigted average exercise price, Outstanding $ 4.55 $ 5.21