Stock Options (Tables)

9 Months Ended

Sep. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activities for the year ended December 31, 2017 and the nine month period ended September 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		(49,112	)		$0.75 – 3.46	$	1.46
Exercised		(289,888	)		$0.75 – 1.70	$	1.16
Balance, September 30, 2019		474,000			$0.75 – 3.46	$	2.10
Exercisable, September 30, 2019		221,000			$0.75 – 1.70	$	1.34

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