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Warrants (Details Narrative) - $ / shares | Apr. 08, 2019 | Jul. 22, 2016 | Jun. 02, 2016
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Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Number of common stock shares sold | 1,542,000 |  |
Pre-funded Warrants [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Purchase of warrants | 3,385,680 |  |
Exercise price of warrants | $ 0.01 |  |
Common Warrants [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Purchase of warrants | 4,927,680 |  |
Exercise price of warrants | $ 3.85 |  |
Warrants and rights outstanding, term | 5 years |  |
June Purchase Agreement [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Number of common stock shares sold |  |  | 20,850
Purchase of warrants |  |  | 7,298
Purchase of common stock warrants |  |  | 0.35
Common stock combined purchase price per share |  |  | $ 92.00
Exercise price of warrants |  |  | $ 121.60
Warrants and rights outstanding, term |  |  | 5 years
Number of exercised warrants |  |  | 0
Second Amended Purchase Agreement [Member] |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |
Number of common stock shares sold |  | 29,750 |
Purchase of warrants |  | 8,925 |
Purchase of common stock warrants |  | 0.30 |
Common stock combined purchase price per share |  | $ 135.00 |
Exercise price of warrants |  | $ 187.20 |
Warrants and rights outstanding, term |  | 5 years |
Number of exercised warrants |  | 0 |
Warrants and Rights Outstanding, Maturity Date |  | Jan. 23, 2022 |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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- Definition Expiration date 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 YYYY-MM-DD format. + 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=123874694&loc=d3e19207-110258 + Details
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