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v3.19.3.a.u2

Stock-Based Compensation and Warrants - Assumptions (Details) - $ / shares | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Oct. 10, 2018 | Dec. 26, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Oct. 10, 2014
Closing stock price | $ 0.88 | $ 18.55 |  | $ 0.56 | $ 61.25
Expected life of warrant (years) |  | 4 years 11 months 1 day | 5 years |  |
Expected Volatility [Member] |  |  |  |  |
Warrants, Measurement Input | 90.00% | 85.00% |  |  |
Risk Free Interest Rate [Member] |  |  |  |  |
Warrants, Measurement Input | 3.01% | 2.42% |  |  |

X
- Definition Percentage of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. + References No definition available. + Details
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X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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