Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award Options and Warrants Vested and Expected to Vest Outstanding and Exercisable [Table Text Block]

The assumptions used for the six months ended June 30, 2017 are as follows:

Exercise price	$0.83-$0.87
Expected dividends	0%
Expected volatility	90%-92%
Risk free interest rate	1.67%-1.75%
Expected life of option	4.2-4.3 years

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of stock option activities for the six months ended June 30, 2018 is as follows:

	Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
Balance - December 31, 2017		12,564,098		$	1.55	4.60 years	$	1,800
Granted		-			-
Exercised		-			-		$	-
Expired		(284,119	)		1.52
Forfeited		(111,464	)		0.78
Balance - June 30, 2018 - outstanding		12,168,515		$	1.55	4.15 years	$	-
Balance - June 30, 2018 - exercisable		8,589,284		$	1.89	3.35 years	$	-
Grant date fair value of options granted -  June 30, 2018				$	-
Weighted average grant date fair value - June 30, 2018				$	-
Grant date fair value of options granted - December 31, 2017				$	1,164,732
Weighted average grant date fair value - December 31, 2017				$	0.37