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Stock Options - Summary of Options Outstanding by Price Range (Details) - Stock Option Plan [Member]
6 Months Ended
Jun. 30, 2017
$ / shares
shares
Options Outstanding, exercise price Lower limit $ 0.25
Options Outstanding, exercise price Upper limit $ 0.70
Options Outstanding, Number Outstanding | shares 6,300,000
Options Outstanding, Remaining Average Contractual Life 6 years 5 months 20 days
Options Outstanding, Weighted Average Exercise Price $ 0.47
Options Exercisable, Number Exercisable | shares 3,958,332
Options Exercisable, Weighted Average Exercise Price $ 0.42