Stock Options (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2017

Dec. 31, 2016

Stock Options Tables

Summary of stock option activity

	Number of Options			Weighted Average Exercise Price ($)		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($)
Outstanding at December 31, 2015		257,500			1.07
Grants		187,500			1.92
Forfeitures		(40,000	)		1.65
Exercises		(20,000	)		0.80
Outstanding at December 31, 2016		385,000			1.42
Exercises		(150,000	)		1.12
Outstanding at March 31, 2017		235,000			1.62	8.37 years		386,275
Exercisable at March 31, 2017		205,000			1.70	8.57 years		319,975
Available for grant at March 31, 2017		19,595,000

	Number of Options			Weighted Average Exercise Price ($)		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value ($)
Outstanding at December 31, 2014		185,000			0.83
Grants		80,000			1.54
Forfeitures		(7,500	)		1.43
Outstanding at December 31, 2015		257,500			1.07
Grants		187,500			1.92
Forfeitures		(40,000	)		1.65
Exercises		(20,000	)		0.80
Outstanding at December 31, 2016		385,000			1.42	8.30 years	277,625
Exercisable at December 31, 2016		347,500			1.44	8.36 years	244,925
Available for grant at December 31, 2016		19,595,000

Summary of assumption of stock option activity

	2016
Risk-free interest rate	1.23%-1.41		%
Expected life in years		5.5
Weighted Avg. Expected Volatility		92	%
Expected dividend yield		0

	2016		2015
Risk-free interest rate	1.23%-1.41%			1.49%-1.70%
Expected life in years		5.5		5.0
Weighted Avg. Expected Volatility		92%		88.4–105.3%
Expected dividend yield		0		0

Summary of stock options outstanding and exercisable

	Stock Options Outstanding						Stock Options Exercisable
Range of Exercise Prices	Number of Shares Subject to Outstanding Options		Weighted Average Contractual Life (years)		Weighted Average Exercise Price		Number of Shares Subject To Options Exercise		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price
0.80		10,000		7.38		0.80		10,000		7.38		0.80
1.05		55,000		7.01		1.05		25,000		7.01		1.05
1.25		7,500		8.21		1.25		7,500		8.21		1.25
1.34		7,500		8.25		1.34		7,500		8.25		1.34
1.65		10,000		8.59		1.65		10,000		8.59		1.65
1.70		7,500		8.55		1.70		7,500		8.55		1.70
1.91		130,000		8.96		1.91		130,000		8.96		1.91
2.28		7,500		9.31		2.28		7,500		9.31		2.28
Total		235,000		8.37	$	1.62		205,000		8.57	$	1.70

		Stock Options Outstanding						Stock Options Exercisable
Range of Exercise Prices		Number of Shares Subject to Outstanding Options		Weighted Average Contractual Life (years)		Weighted Average Exercise Price		Number of Shares Subject To Options Exercise		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price
$	0.65		40,000		7.01	$	0.65		40,000		7.01	$	0.65
	0.75		40,000		6.92		0.75		40,000		6.92		0.75
	0.80		30,000		7.62		0.80		30,000		7.62		0.80
	1.05		55,000		7.25		1.05		25,000		7.25		1.05
	1.25		7,500		8.46		1.25		7,500		8.46		1.25
	1.34		7,500		8.50		1.34		7,500		8.50		1.34
	1.65		10,000		8.84		1.65		10,000		8.84		1.65
	1.70		7,500		8.79		1.70		7,500		8.79		1.70
	1.91		180,000		9.21		1.91		180,000		9.21		1.91
	2.28		7,500		9.56		2.28		-		9.56		2.28
Total			385,000		8.30	$	1.42		347,500		8.36	$	1.44