Schedule of Changes in Common Stock Options (Details)	6 Months Ended
	Jun. 30, 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	526,500
Options, Exercised | shares	(173,130)
Options, Forfeited | shares	(931,550)
Options, Outstanding at the end of the period | shares	4,462,270
Options, Exercisable at the end of the period | shares	1,927,845
Weighted Average Exercise Price, Outstanding at the beginning of the period | $ / shares	$ 0.97
Weighted Average Exercise Price, Granted | $ / shares	0.43
Weighted Average Exercise Price, Exercised | $ / shares	0.43
Weighted Average Exercise Price, Forfeited | $ / shares	1.88
Weighted Average Exercise Price, Outstanding at the end of the period | $ / shares	0.74
Weighted Average Exercise Price, Exercisable at the end of the period | $ / shares	$ 1.12