Stock Options (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table summarizes the Company’s stock option activity for the years ended December 31, 2018 and 2017:

	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
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
Exercisable, December 31, 2018		555,000		$	0.75 – 1.70	$	1.27

Schedule of Stock Option Fair Value Assumptions

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

	2018			2017
Expected life – years		3.0			3.0
Interest rate		2.8 – 2.96	%		2.23	%
Volatility		47.77 – 51.85	%		73.09	%
Dividend yield		—	%		—	%
Weighted average fair value of options granted	$	0.4759 – 0.6313		$	0.8344