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Stockholders' Equity - Schedule of Estimated Values of Warrants Valuation Assumptions (Details) - Warrants [Member]	6 Months Ended
	Jun. 30, 2019
Bridge Noteholders September 21, 2017 [Member]
Risk-free interest rate	1.89%
Weighted average expected term	5 years
Expected volatility	130.80%
Expected dividend yield	0.00%
Placement Agent December 30, 2016 [Member]
Risk-free interest rate	1.93%
Weighted average expected term	5 years
Expected volatility	123.07%
Expected dividend yield	0.00%
Placement Agent November 17, 2017 [Member]
Risk-free interest rate	2.06%
Weighted average expected term	5 years
Expected volatility	129.87%
Expected dividend yield	0.00%
Placement Agent November 30, 2017 [Member]
Risk-free interest rate	2.14%
Weighted average expected term	5 years
Expected volatility	129.34%
Expected dividend yield	0.00%
Placement Agent September 20, 2018 [Member]
Risk-free interest rate	2.96%
Weighted average expected term	5 years
Expected volatility	122.52%
Expected dividend yield	0.00%
Placement Agent September 26, 2018 [Member]
Risk-free interest rate	2.96%
Weighted average expected term	5 years
Expected volatility	122.92%
Expected dividend yield	0.00%

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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 (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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
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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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