Net Loss per Common Share (Basic and Diluted Income (Loss) Per Share) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic and diluted net loss per common share calculation:
Net loss, basic	$ (3,617,000)	$ (3,134,000)
Net loss, diluted	$ (3,617,000)	$ (3,134,000)
Weighted average shares outstanding, basic	32,390,144	13,298,159
Net loss per share, basic	$ (0.11)	$ (0.24)
Weighted average shares outstanding, diluted	32,390,144	13,298,159
Net loss per share, diluted	$ (0.11)	$ (0.24)