STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2021

Dec. 31, 2020

STOCKHOLDERS' EQUITY

Schedule of share-based compensation expense

The following summarizes share-based compensation expense for the years ended December 31, 2020 and 2019, which was allocated as follows:

	December 31,
	2020		2019
Research and development	$	-	$	63,207
General and administrative		332,003		206,533
	$	332,003	$	269,740

Summary of stock option activity

The following summarizes stock option activity for the years ended December 31, 2020 and 2019:

		Options Outstanding
	Shares					Weighted average
	available for	Number of	Exercise price			exercise
	grants	shares	range			price
December 31, 2018	4,123,142	9,044,825	$	0.14 - 0.64	$	0.28
2018 Plan additions	2,630,130	-		-		-
Grants	(2,415,000)	2,415,000		0.21		0.21
Expirations	-	(1,638,575)		0.14 - 0.57		0.21
2010 Plan Expiration	(728,142)	-		-		-
December 31, 2019	3,610,130	9,821,250		0.16 - 0.64		0.28
2018 Plan additions	2,668,836	-		-		-
Grants	(2,130,000)	2,130,000		0.30		0.30
Expirations	-	-		-		-
December 31, 2020	4,148,966	11,951,250	$	0.16 - 0.64	$	0.28
Vested and expected to vest at December 31, 2020		11,811,875
Exercisable at December 31, 2020		8,745,500

Schedule of the Company's stock options

A summary of the Company’s stock options for the six months ended June 30, 2021 is as follows:

				Weighted
				Average
		Weighted		Remaining
	Number of	Average		Contractual		Aggregate
	Shares	Exercise Price		Life		Intrinsic Value
Options Outstanding, December 31, 2020	11,951,250	$	0.28
Granted	-	$	0.30
Exercised	(105,000)	$	0.21
Forfeited	(1,915,000)	$	0.21
Options Outstanding, June 30, 2021	9,931,250	$	0.30	5.9	years	$	283,550
Vested and unvested but expected to vest, June 30, 2021	9,606,260	$	0.30	5.9	years	$	274,271
Exercisable at June 30, 2021	7,861,250	$	0.31	5.3	years	$	223,250

The following summarizes information about stock options outstanding at December 31, 2020:

		Weighted		Weighted
		Average		Average	Aggregate
	Number of	Exercise		Remaining	Intrinsic
	Shares	Price		Contractual Life	Value
Options Outstanding, December 31, 2019	9,821,250	$	0.28
Granted	2,130,000	$	0.30
Exercised	-	$	-
Forfeited	-	$	-
Options Outstanding, December 31, 2020	11,951,250	$	0.28	5.4 years	$	2,189,575
Vested and unvested but expected to vest, December 31, 2020	11,811,875	$	0.28	5.4 years	$	2,164,040
Exercisable at December 31, 2020	8,745,500	$	0.29	4.1 years	$	1,563,850

Schedule of forward-looking range of assumptions to value the stock options issue

	2020		2019
Dividend yield	0.0	%	0.0	%
Risk-free rate of return	0.33	%	2.15	%
Expected life in years	5.88		5.88
Volatility	74.57	%	93.59	%
Forfeiture rate	2.6	%	2.6	%

Summary of warrant activity

The following table summarizes our warrant activity for 2020 and 2019:

	Warrants Outstanding
				Weighted
				average
	Number of	Exercise price		exercise
	shares	range		price
December 31, 2018	4,220,594	$	0.23 - 0.37	$	0.24
Issuances	8,125,000		0.18		0.18
Exercises	(1,925,000)		0.125		0.125
December 31, 2019	10,420,594		0.23 - 0.37		0.24
Issuances	1,043,988		0.45		0.45
Exercises	(1,935,294)		0.125		0.125
December 31, 2020	9,529,288	$	0.125 - 0.45	$	0.21