Stock Options - Schedule of Stock Option Activity (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Number of shares, Beginning Balance	713,000	813,000
Number of shares, Granted	5,000	154,000
Number of shares, Cancelled or expired	3,000	(114,000)
Number of shares, Exercised	(33,000)	(140,000)
Number of shares, Ending balance	682,000	713,000
Number of shares, Exercisable, Ending balance	526,000
Exercise price per share, Granted	$ 1.48	$ 1.70
Exercise price per share, Cancelled or expired	1.70
Weighted average exercise price, Beginning Balance	1.21	1.19
Weighted average exercise price, Granted	1.48	1.70
Weighted average exercise price, Cancelled or expired	1.70	1.75
Weighted average exercise price, Exercised	1.10	1.11
Weighted average exercise price, Ending Balance	1.22	1.21
Weighted average exercise price, Exercisable Ending balance	1.08
Minimum [Member]
Exercise price per share, Beginning Balance	0.75	0.75
Exercise price per share, Cancelled or expired		1.00
Exercise price per share, Exercised	1.00	0.75
Exercise price per share, Ending Balance	0.75	0.75
Exercise price per share, Exercisable, Ending balance	0.75
Maximum [Member]
Exercise price per share, Beginning Balance	1.70	2.22
Exercise price per share, Cancelled or expired		2.22
Exercise price per share, Exercised	1.42	1.21
Exercise price per share, Ending Balance	1.70	$ 1.70
Exercise price per share, Exercisable, Ending balance	$ 1.41