Schedule of Changes in Common Stock Options (Details)	3 Months Ended
	Mar. 31, 2018 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options, Outstanding at the beginning of the period | shares	5,040,450
Options, Granted | shares	226,500
Options, Exercised | shares	0
Options, Forfeited | shares	(51,550)
Options, Outstanding at the end of the period | shares	5,215,400
Options, Exercisable at the end of the period | shares	2,668,475
Weighted Average Exercise Price, Outstanding at the beginning of the period | $ / shares	$ 0.97
Weighted Average Exercise Price, Granted | $ / shares	0.44
Weighted Average Exercise Price, Exercised | $ / shares	0
Weighted Average Exercise Price, Forfeited | $ / shares	0.99
Weighted Average Exercise Price, Outstanding at the end of the period | $ / shares	0.95
Weighted Average Exercise Price, Exercisable at the end of the period | $ / shares	$ 1.42