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Stockholders' Equity (Details 2) - Employee Stock Option [Member] - $ / shares	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of outstanding service-based options
Number of Options	14,320,000	13,820,000	10,960,800
Exercise Price Range One [Member]
Summary of outstanding service-based options
Number of Options	8,620,000
Weighted Average Remaining Contractual Life	3 years 10 months 25 days
Exercise Price Range One [Member] | Minimum [Member]
Summary of outstanding service-based options
Exercise Price	$ 0.20
Exercise Price Range One [Member] | Maximum [Member]
Summary of outstanding service-based options
Exercise Price	$ 0.25
Exercise Price Range Two [Member]
Summary of outstanding service-based options
Number of Options	3,825,000
Weighted Average Remaining Contractual Life	8 years 6 months
Exercise Price Range Two [Member] | Minimum [Member]
Summary of outstanding service-based options
Exercise Price	$ 0.35
Exercise Price Range Two [Member] | Maximum [Member]
Summary of outstanding service-based options
Exercise Price	$ 0.30
Exercise Price Range Three [Member]
Summary of outstanding service-based options
Number of Options	1,875,000
Weighted Average Remaining Contractual Life	4 years 8 months 12 days
Exercise Price Range Three [Member] | Minimum [Member]
Summary of outstanding service-based options
Exercise Price	$ 0.40

X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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