Summary Of Significant Accounting Policies (Computation Of Basic And Diluted EPS) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Summary Of Significant Accounting Policies [Abstract]
Net loss	$ (4,334,322)	$ (6,213,238)	$ (3,334,653)	$ (10,820,655)
Deemed dividend on convertible preferred stock		(6,137,476)		(6,137,476)
Cumulative dividend on convertible preferred stock	(337,963)		(1,070,812)
Net loss attributable to common stockholders	$ (4,672,285)	$ (12,350,714)	$ (4,405,465)	$ (16,958,131)
Weighted average number of common shares and equivalents:	22,750,405	21,869,177	22,551,496	21,758,529
Basic EPS	$ (0.21)	$ (0.56)	$ (0.20)	$ (0.78)
Diluted EPS	$ (0.21)	$ (0.56)	$ (0.20)	$ (0.78)