Note 8 - Stock Options and Warrants (Details 1) - $ / shares |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Warrants Outstanding | |||
| Outstanding as of December 31, 2018 | 1,113 | ||
| Outstanding as of June 30, 2019 | 1,113 | ||
| Exercisable as of June 30, 2019 | 1,813,053 | ||
| Weighted Average Exercise Price | |||
| Exercisable as of June 30, 2019 | $ 0.35 | ||
| Warrant | |||
| Warrants Outstanding | |||
| Outstanding as of December 31, 2018 | 1,813,053 | 0 | 15,550 |
| Granted | 0 | 1,813,053 | 486,531 |
| Forfeited | 0 | 0 | 0 |
| Exercised | 0 | 0 | (501,901) |
| Outstanding as of June 30, 2019 | 1,813,053 | 1,813,053 | 0 |
| Exercisable as of June 30, 2019 | 1,813,053 | 0 | |
| Weighted Average Exercise Price | |||
| Outstanding as of December 31, 2018 | $ 0.35 | $ 0.00 | $ 135.00 |
| Granted | 0.00 | 2.00 | 15.00 |
| Forfeited | 0.00 | 0.00 | 0.00 |
| Exercised | 0.00 | 0.00 | 15.00 |
| Outstanding as of June 30, 2019 | $ 0.35 | 0.35 | 0.00 |
| Exercisable as of June 30, 2019 | $ 2.00 | $ 0.00 | |
| X | ||||||||||
- References No definition available.
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- References No definition available.
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- References No definition available.
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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