Stockholders' Equity and Stock-Based Compensation (Details 7) - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Expected volatility | 90.00% | |
| Risk free interest rate | 2.84% | |
| Dividend yield rate | 0.00% | 0.00% |
| Weighted average remaining expected life | 9 years 9 months 18 days | |
| Closing price per share - common stock | $ 0.88 | |
| Option Grants Awards Issued In 2017 [Member] | ||
| Dividend yield rate | 0.00% | |
| Weighted average remaining expected life | 4 years 2 months 12 days | |
| Closing price per share - common stock | $ 1.05 | |
| Minimum [Member] | ||
| Expected volatility | 87.50% | |
| Risk free interest rate | 2.24% | |
| Maximum [Member] | ||
| Expected volatility | 91.00% | |
| Risk free interest rate | 2.42% | |
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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- Definition Weighted average expected volatility rate of share-based compensation awards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Price of a single share of a number of saleable stocks of a company. No definition available.
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