Stock Options and Warrants (Tables)

6 Months Ended

Jun. 30, 2019

Assumptions

	Six months ended
	2019		2018
Volatility		85%		79%
Expected term (years)	10 years		10 years
Risk-free interest rate		2.01%		2.90%
Dividend yield		0%		0%

Employee Stock Option [Member]

Schedule of share-based compensation activity

	Six months ended June 30, 2019						Six months ended June 30, 2018
	Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of June 30, 2019		Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of June 30, 2018
Options outstanding at beginning of period		2,222,000	$	0.13				2,147,000	$	0.13
Granted		80,000	$	0.07				80,000	$	0.13
Exercised		0		NA				0		NA
Cancelled/expired		0		NA				0		NA
Options outstanding at end of period		2,302,000	$	0.13	$	1,000		2,227,000	$	0.13	$	5,000
Options exercisable at end of period		2,142,000	$	0.13				2,147,000	$	0.13

Warrant [Member]

Schedule of share-based compensation activity

	Six months ended June 30, 2019						Six months ended June 30, 2018
	Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of June 30, 2019		Shares		Weighted Average Exercise Price		Aggregate Intrinsic Value as of June 30, 2018
Warrants outstanding at beginning of period		2,000,000	$	0.18				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 period		2,000,000	$	0.18		None		2,000,000	$	0.18		None
Warrants exercisable at end of period		2,000,000	$	0.18				2,000,000	$	0.18