Stock Options (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Number of Options
Options outstanding - beginning balance	545,000	385,000	385,000
Options granted		310,000	310,000
Options exercised	(187,500)	(150,000)	(150,000)
Options oustanding - ending balance	357,500		545,000
Options exercisable	347,500		(187,500)
Weighted average exercise price
Options outstanding - beginning balance	$ 3.09	$ 1.42	$ 1.42
Options granted			4.20
Options exercised	2.86		1.12
Options outstanding - ending balance	3.21		3.09
Options exercisable	$ 3.27		$ 2.86
Weighted average remaining contracted term
Options outstanding - ending balance	7 years 9 months 25 days
Options exercisable	7 years 10 months 21 days
Aggregate intrinsic value
Options outstanding - ending balance	$ 42,825
Options exercisable	$ 37,325