Net Loss Per Share (Schedule Of Computation Of Basic And Diluted Earnings Per Share) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Net Loss Per Share [Abstract]
Net loss	$ (5,887,410)	$ (5,286,720)
Deemed dividend on convertible preferred stock		(6,145,402)
Cumulative dividend on convertible preferred stock	(1,432,259)	(368,152)
Net loss attributable to common stockholders	$ (7,319,669)	$ (11,800,274)
Weighted average number of common shares and equivalents:	22,614,248	21,807,634
Basic EPS	$ (0.32)	$ (0.54)
Diluted EPS	$ (0.32)	$ (0.54)