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Stock Options and Warrants (Tables)

12 Months Ended

Dec. 31, 2018

Warrant [Member]

Schedule of company's stock options

		Warrants				Wtd. Avg. Exercise Price				Wtd. Ave. Remaining Contractual Life (years)
Balance, January 1, 2017			840,276			$	5.13				4.01
Granted during the period			971,611				2.61				4.42
Exercised during the period			-				-				-
Terminated/Expired during the period			(107,785	)			3.62				-
Balance, December 31, 2017			1,704,102				2.66				4.04
Granted during the period			535,600				1.45				4.35
Terminated/Expired during the period			-				-				-
Balance, December 31, 2018			2,239,702			$	3.10				3.35
Exercisable at December 31, 2018			2,239,702			$	3.10				3.35

Schedule of stock options/ warrants granted

		2018				2017
Risk-free interest rates			2.33	%			1.85% - 2.20%
Expected life (in years)			4.9				5
Expected volatility			116	%			63%-115%
Dividend yield			0				0
Weighted-average grant date fair value per share		$	1.24				$1.10-$2.89

Employee Stock Option [Member]

Schedule of fair values of stock options granted

		2018				2017
Risk-free interest rates			2.69	%			1.72% - 1.81	%
Expected life (in years)			4.9				4.9
Expected volatility			66	%			82% - 85	%
Dividend yield			0.0	%			0.0	%
Weighted-average grant date fair value per share		$	0.72			$	0.90

Schedule of company's stock options

		Options				Wtd. Avg. Exercise Price
Balance, January 1, 2017			636,342			$	7.01
Granted during the period			695,000				1.45
Exercised during the period			-				-
Terminated/Expired during the period			(285,715	)			7.66
Balance, December 31, 2017			1,048,627				3.20
Granted during the period			88,000				1.56
Exercised during the period			-				-
Terminated/Expired during the period			(298,478	)			3.04
Balance, December 31, 2018			838,149			$	3.08
Exercisable at December 31, 2018			598,149			$	3.73

Schedule of stock options/ warrants granted

Range of Exercise Prices				Number Outstanding				Wtd. Avg. Life		Wtd. Avg. Exercise Price
$	0.00 - $5.00				646,000			5.2 years		$	8.18
$	5.01 - $20.00				192,149			1.6 years			1.56
$	0.00 - $20.00				838,149			4.4 years		$	3.08

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- Definition

Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

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- Definition

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