Stock Options and Warrants (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2020

Dec. 31, 2019

Valuation assumptions

	Nine months ended September 30, 2020						Nine months ended September 30, 2019
	Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of September 30, 2020	Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of September 30, 2019
Warrants outstanding at beginning of year		2,000,000		$	0.18			2,000,000	$	0.18
Granted		0		NA				0	NA
Exercised		0		NA				0	NA
Cancelled/expired		(2,000,000	)	$	0.18			0	NA
Warrants outstanding at end of year		0		NA		None		2,000,000	$	0.18		None
Warrants exercisable at end of year		0		NA				2,000,000	$	0.18

Stock Options

Stock option/warrant activity

	Nine months ended September 30, 2020							Nine months ended September 30, 2019
	Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of September 30, 2020		Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of September 30, 2019
Options outstanding at beginning of year		2,252,000		$	0.13				2,222,000		$	0.13
Granted		0		NA					80,000		$	0.07
Exercised		0		NA					0		NA
Cancelled/expired		(110,000	)	$	0.10				(50,000	)	$	0.20
Options outstanding at end of period		2,142,000		$	0.13	$	398,000		2,252,000		$	0.13	$	1,000
Options exercisable at end of period		2,142,000		$	0.13				2,172,000		$	0.13

	Year Ended December 31,2019							Year Ended December 31, 2018
	Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of December 31, 2019		Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of December 31, 2018
Options outstanding at beginning of year		2,222,000		$	0.13	$	3,000		2,147,000		$	0.13
Granted		80,000		$	0.07				80,000		$	0.10
Exercised		0		NA					0		NA
Cancelled/expired		(50,000	)	$	0.20				(5,000	)	$	0.26
Options outstanding at end of year		2,252,000		$	0.14	$	1,000		2,222,000		$	0.13	$	3,000
Options exercisable at end of year		2,172,000		$	0.13				2,142,000		$	0.13

Schedule of share-based compensation, shares authorized under stock option plans, by exercise price range

Options Outstanding					Options Exercisable
Range of exercise price	Shares		Weighted average exercise price	Weighted average remaining life in years	Shares		Weighted average exercise price
$0.07 - $0.10	365,000	$	0.09	4.43	285,000	$	0.09
$0.11 - $0.14	1,485,000	$	0.12	5.35	1,485,000	$	0.12
$0.15 - $0.26	402,000	$	0.18	3.47	402,000	$	0.18
TOTAL	2,252,000	$	0.14	4.87	2,172,000	$	0.13

Valuation assumptions

	Year Ended December 31
	2019		2018
Volatility		85%		79%
Expected term (years)	10 years		10 years
Risk-free interest rate		2.01%		2.90%
Dividend yield		0%		0%

Warrants

Stock option/warrant activity

	Nine months ended September 30, 2020						Nine months ended September 30, 2019
	Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of September 30, 2020	Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of September 30, 2019
Warrants outstanding at beginning of year		2,000,000		$	0.18			2,000,000	$	0.18
Granted		0		NA				0	NA
Exercised		0		NA				0	NA
Cancelled/expired		(2,000,000	)	$	0.18			0	NA
Warrants outstanding at end of year		0		NA		None		2,000,000	$	0.18		None
Warrants exercisable at end of year		0		NA				2,000,000	$	0.18

	Year Ended December 31, 2019							Year Ended December 31, 2018
	Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value as of December 31, 2019		Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of December 31, 2018
Warrants outstanding at beginning of year		2,000,000		$	0.18		None		2,060,000	$	0.18
Granted		0			NA				0		NA
Exercised		0			NA				0		NA
Cancelled/expired		(0	)		NA				60,000	$	0.18
Warrants outstanding at end of year		2,000,000		$	0.18		None		2,000,000	$	0.18		None
Warrants exercisable at end of year		2,000,000		$	0.18				2,000,000	$	0.18