Stock Options (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [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 six month period ended June 30, 2019:

	Number of shares			Exercise price per share		Weighted average exercise price
Balance, December 31, 2017		713,000		$	0.75 – 1.70	$	1.21
Granted		110,000		$	1.48 – 1.75	$	1.74
Cancelled or expired		(61,334	)	$	1.00 – 1.70	$	1.09
Exercised		(101,666	)	$	0.75 – 1.42	$	1.01
Balance, December 31, 2018		660,000		$	0.75 – 1.75	$	1.35
Granted		153,000		$	3.46	$	3.46
Cancelled or expired		(47,112	)	$	0.75 – 1.70	$	1.37
Exercised		(117,888	)	$	0.75 – 1.70	$	1.19
Balance, June 30, 2019		648,000		$	0.75 – 3.46	$	1.85
Exercisable, June 30, 2019		395,000		$	0.75 – 1.70	$	1.25

Schedule of Stock Option Fair Value Assumptions

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

	2019			2018
Expected life – years		3.0			3.0
Interest rate		1.93	%		2.8 – 2.96	%
Volatility		43.89	%		47.59 – 51.85	%
Weighted average fair value of options granted	$	1.0959		$	0.4759 – 0.6313