Stock Options and Warrants (Tables)

12 Months Ended

Dec. 31, 2019

Warrant [Member]

Schedule of company's stock options

	Warrants			Wtd. Avg. Exercise Price		Wtd. Ave. Remaining Contractual Life (years)
Balance, January 1, 2018		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
Granted during the period		-			-		-
Terminated/Expired during the period		(56,800	)	$	10.80		-
Balance, December 31, 2019		2,182,902		$	2.90		2.43
Exercisable at December 31, 2019		2,182,902		$	2.90		2.43

Schedule of stock options/ warrants granted

	2019			2018
Risk-free interest rates		2.33	%		2.69	%
Expected life (in years)		4.9			4.9
Expected volatility		116.0	%		66	%
Dividend yield		0.0	%		0.0	%
Weighted-average grant date fair value per share		1.24		$	1.24

Employee Stock Option [Member]

Schedule of fair values of stock options granted

	2019			2018
Risk-free interest rates		1.87% - 2.60	%		2.69	%
Expected life (in years)		4.90 - 6.80			4.90
Expected volatility		65.8% - 72.4	%		66	%
Dividend yield		0.00	%		0.00	%
Weighted-average grant date fair value per share	$	0.50		$	0.72

Schedule of company's stock options

	Options			Wtd. Avg. Exercise Price
Balance, January 1, 2018		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
Granted during the period		613,000			0.96
Exercised during the period		(15,000	)		0.88
Terminated/Expired during the period		(66,500	)		7.46
Balance, December 31, 2019		1,369,649		$	2.01
Exercisable at December 31, 2019		1,269,649		$	2.06

Schedule of stock options/ warrants granted

Range of Exercise Prices	Number Outstanding		Wtd. Avg. Life	Wtd. Avg. Exercise Price
$ 0.00 - $ 5.00		1,224,000	5.20 years	$	8.18
$ 5.01 - $ 20.00		145,000	1.60 years		1.56
$0.00 - $20.00		1,369,000	4.40 years	$	3.08