Loss Per Common Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Basic loss per common share is computed by dividing the net income or loss by the basic weighted-average number of shares of common stock outstanding during each period presented. Diluted loss per common share is computed by dividing the net income or loss by the total of the basic weighted-average number of shares of common stock outstanding plus the additional dilutive securities that could be exercised or converted into common shares during each period presented less the amount of shares that could be repurchased using the proceeds from the exercises.

	Three Months Ended						Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017
Net loss	$	(1,332,829	)	$	(558,805	)	$	(5,025,704	)	$	(4,724,623	)
Weighted average shares outstanding - basic and diluted	10,365,750			5,702,297			7,351,827			5,659,423
Basic and diluted loss per common share	$	(0.13	)	$	(0.10	)	$	(0.68	)	$	(0.83	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

The Company excluded the following weighted average items from the above computation of diluted loss per common share, as their effect would be anti-dilutive:

	Three Months Ended		Nine Months Ended
	September 30, 2018	September 30, 2017	September 30, 2018	September 30, 2017
Stock options	1,048,135	993,546	1,040,940	979,775
Warrants	480,658	520,147	503,413	537,039
Total excluded shares	1,528,793	1,513,693	1,544,353	1,516,814