Stock Options (Tables)

3 Months Ended

Mar. 31, 2018

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

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activity for the year ended December 31, 2017 and the three-month period ended March 31, 2018:

	Number of shares			Exercise price per share		Weighted average exercise price
Balance, December 31, 2016		813,000			$0.75 - $2.22	$	1.19
Granted		154,000		$	1.70	$	1.70
Cancelled or expired		(114,000	)	$	1.00 – 2.22	$	1.75
Exercised		(140,000	)	$	0.75 – 1.21	$	1.11
Balance, December 31, 2017		713,000		$	0.75 – 1.70	$	1.21
Cancelled or expired		-			-		-
Exercised		(33,000	)	$	1.00 - 1.42	$	1.10
Balance, March 31, 2018		680,000		$	0.75 – 1.70	$	1.22
Exercisable, March 31, 2018		526,000		$	0.75 – 1.41	$	1.08

Schedule of Stock Option Fair Value Assumptions

The fair value of each option grant is calculated using the following weighted average assumptions:

	2017
Expected life – years		3.0
Interest rate		2.23	%
Volatility		73.09	%
Dividend yield		—	%
Weighted average fair value of options granted	$	0.8344