10. Stock Options and Warrants (Tables)

12 Months Ended

Dec. 31, 2015

Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]

Stock options outstanding

	Weighted Avg. Options			Weighted Avg. Exercise Price
Options, January 1, 2013		27,278,098		$	0.27
Options granted		207,819			1.17
Options exercised		(115,000	)		0.60
Options forfeited		(7,061,009	)		0.25
Options, December 31, 2013		20,309,908		$	0.28
Options granted		852,122			0.80
Options exercised		(20,000	)		0.30
Options forfeited		(90,000	)		0.91
Options, December 31, 2014		21,052,030		$	0.20
Options granted		838,552			0.46
Options exercised		–			–
Options forfeited		(355,434	)		0.72
Options, December 31, 2015		21,535,148		$	0.30

Options outstanding by Per Share Price

	Outstanding Options						Exercisable Options
Option Exercise Price Per Share	Shares		Life (Years)		Weighted Average Exercise Price		Shares		Weighted Average Exercise Price
$ 0.21 - $ 0.99		21,343,280		5.2	$	0.29		20,408,283	$	0.29
$ 1.00 - $ 1.99		191,868		4.2	$	1.22		263,229	$	1.20
		21,535,148			$	0.30		20,671,512	$	0.30

Assumptions

	Years Ended
	2015		2014		2013
Expected life (years)	5.0 – 5.5		1.5 – 5.5		1.5 – 5.5
Risk free interest rate	1.56 – 1.72	%	0.12 – 1.70	%	0.34 – 1.65	%
Volatility	106 – 121	%	123 – 135	%	127 – 130	%
Expected dividend yield	0	%	0	%	0	%

Warrants outstanding

	Warrants			Weighted Avg. Exercise Price
Warrants outstanding, January 1, 2013		42,205,507		$	0.31
Warrants granted		150,000			0.30
Warrants exercised		(29,037,389	)		0.29
Warrants cancelled		(1,554,152	)		0.33
Warrants outstanding, December 31, 2013		11,763,966		$	0.34
Warrants granted		761,037			0.71
Warrants exercised		(4,690,947	)		0.30
Warrants cancelled		(2,141,969	)		0.46
Warrants outstanding, December 31, 2014		5,692,087		$	0.36
Warrants granted		1,796,667			0.20
Warrants exercised		(200,000	)		0.25
Warrants cancelled		(2,877,087	)		0.36
Warrants outstanding, December 31, 2015		4,411,667		$	0.31

Warrants outstanding by Per Share Price

	Outstanding Warrants						Exercisable Warrants
Warrant Exercise Price Per Share	Shares		Life (Years)		Weighted Average Exercise Price		Shares		Weighted Average Exercise Price
$ 0.25 - $ 0.99		4,291,667		3.2	$	0.36		4,291,667	$	0.34
$ 1.00 - $ 1.99		120,000		0.0	$	1.01		120,000	$	1.01
		4,411,667			$	0.38		4,411,667	$	0.35