Stock Options (Tables)

12 Months Ended

Dec. 31, 2017

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 years ended December 31, 2017 and 2016:

	Number of shares			Exercise price per share		Weighted average exercise price
Balance, December 31, 2015		1,190,000			$0.75 - $2.45	$	1.34
Granted		168,000			$1.42	$	1.42
Cancelled or expired		(515,000	)		$0.75 – 2.45	$	1.61
Exercised		(30,000	)		$1.00 – 1.21	$	1.09
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
Exercisable, December 31, 2017		559,000			$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			2016
Expected life – years		3.0			3.0
Interest rate		2.23	%		1.37	%
Volatility		73.09	%		75.64	%
Dividend yield		—	%		—	%
Weighted average fair value of options granted	$	0.8344		$	0.7073