15. STOCK OPTIONS AND WARRANTS (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Assumptions for options granted

We used the following assumptions for options granted in fiscal 2018 and 2017:

	2018	2017
Expected volatility	82.40%	81.05%
Expected term	5 Years	5 Years
Risk-free interest rate	2.59%	1.5%
Expected dividend yield	None	None

Rollforward of option activity

Option activity for the years ended December 31, 2018 and 2017 under the 2008 and 2011 Plans are as follows:

	Number of Options			Weighted Average Exercise Price
Outstanding at December 31, 2016		19,917,007		$	0.25
Granted		645,000			0.16
Exercised		–			–
Forfeited		(1,095,000	)		0.19
Expired		(4,250,343	)		0.33
Outstanding at December 31, 2017		15,216,664		$	0.23
Granted		707,500			0.20
Exercised		–			–
Forfeited		(1,015,000	)		0.19
Expired		(88,575	)		0.63
Outstanding at December 31, 2018		14,820,589		$	0.23
Exercisable at December 31, 2018		14,674,758		$	0.23
Weighted average grant date fair value				$	0.13

Stock options information by exercise price

The following table summarizes information about employee stock options outstanding at December 31, 2018:

	Options Outstanding							Options Exercisable
Range of Exercise Price	Number Outstanding at December 31, 2018		Weighted Average Remaining Contractual Life	Weighted Average Exercise Price		Aggregate Intrinsic Value		Number Exercisable at December 31, 2018		Weighted Average Exercise Price		Aggregate Intrinsic Value
$0.13-0.33		14,820,589	4.75 Years	$	0.23	$	–		14,674,758	$	0.23	$	–
		14,820,589	4.75 Years	$	0.23	$	–		14,674,758	$	0.23	$	–

Warrant activity

Warrant activity for the years ended December 31, 2018 and 2017 are as follows:

	Number of Warrants			Weighted Average Exercise Price
Outstanding at December 31, 2016		28,196,822		$	0.17
Granted		4,416,667			0.15
Exercised		–			–
Forfeited		–			–
Expired		(26,831,589)			0.16
Outstanding at December 31, 2017		5,781,900		$	0.17
Granted		1,581,117		$	0.21
Exercised		–			–
Forfeited		–			–
Expired		(645,067	)		0.25
Outstanding at December 31, 2018		6,717,950		$	0.17
Exercisable at December 31, 2018		6,717,950		$	0.17
Weighted average grant date fair value				$	0.13