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Stock Options and Warrants (Tables)

12 Months Ended

Dec. 31, 2020

Warrant [Member]

Schedule of stock options/ warrants outstanding

										Wtd. Avg.
						Wtd. Avg.				Remaining
						Exercise				Contractual
		Warrants				Price				Life (years)
Balance, January 1, 2019			2,239,762			$	3.10				3.35
Granted during the period			-				-				-
Terminated/Expired during the period			(56,800	)			10.80				-
Balance, December 31, 2019			2,182,962			$	2.90				2.43
Granted during the period			-				-				-
Terminated/Expired during the period			-			$	-				-
Balance, December 31, 2020			2,182,962			$	2.90				1.43
Exercisable at December 31, 2020			2,182,962			$	2.90				1.43

Employee Stock Option [Member]

Schedule of fair values of stock options granted

		2020				2019
Risk-free interest rates			0.22% - 1.61	%			1.87% - 2.60	%
Expected life (in years)			2.50 - 4.00				4.90 - 6.80
Expected volatility			71.5% - 75.4	%			65.8% - 72.4	%
Dividend yield			0.00	%			0.00	%
Weighted-average grant date fair value per share		$	0.64			$	0.50

Schedule of company's stock options

		Number								Wtd. Avg,		Wtd. Avg.
Range of Exercise Price		Outstanding				Exercisable				Life		Exercise Price
$0.00 - $5.00			1,784,000				1,414,000			3.69 years		$	1.25
$5.01 - $15.00			75,000				75,000			0.32 years		$	8.85
$0.00 - $15.00			1,859,000				1,489,000			3.55 years		$	1.56

Schedule of stock options/ warrants outstanding

						Wtd. Avg.
						Exercise
		Options				Price
Balance, January 1, 2019			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
Granted during the period			560,000				1.20
Exercised during the period			-				-
Terminated/Expired during the period			(70,649	)			7.48
Balance, December 31, 2020			1,859,000			$	1.56
Exercisable at December 31, 2020			1,488,997			$	1.68

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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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