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Share-Based Compensation - Schedule of Estimated Values of Stock Option Grants Valuation Assumptions (Details) | 3 Months Ended
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Mar. 31, 2018
April 30, 2015 Grant [Member] |
Risk-free interest rate | 1.43%
Weighted average expected term | 5 years
Expected volatility | 143.10%
Expected dividend yield | 0.00%
January 1 , 2016 Grant [Member] |
Risk-free interest rate | 1.76%
Weighted average expected term | 5 years
Expected volatility | 134.18%
Expected dividend yield | 0.00%
February 10 , 2016 Grant [Member] |
Risk-free interest rate | 1.15%
Weighted average expected term | 5 years
Expected volatility | 132.97%
Expected dividend yield | 0.00%
December 6 , 2016 Grant [Member] |
Risk-free interest rate | 1.84%
Weighted average expected term | 5 years
Expected volatility | 123.82%
Expected dividend yield | 0.00%
March 15, 2017 Grant [Member] |
Risk-free interest rate | 2.14%
Weighted average expected term | 5 years
Expected volatility | 121.19%
Expected dividend yield | 0.00%
September 25, 2017 Grant [Member] |
Risk-free interest rate | 1.85%
Weighted average expected term | 5 years
Expected volatility | 130.79%
Expected dividend yield | 0.00%

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- 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=109197908&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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)(iv) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average expected volatility rate of share-based compensation awards. + 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)(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, 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 (f)(2)(i) -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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 + Details
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