Basis of Presentation and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Anti Dilutive Securities Excludes from Computation

The following table sets forth the potentially dilutive securities excluded from the computation of diluted net loss per share because such securities have an anti-dilutive impact due to losses reported, as of March 31,: 

	2019		2018
Options to purchase common stock		15,841,000		15,081,000
Convertible preferred stock		4,828,530		4,828,530
Warrants to purchase common stock		5,500,000		4,500,000
Common stock subject to repurchase		-		(507,079	)
Potential shares excluded from diluted net loss per share		26,169,530		19,851,451