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v3.19.2

Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Mar. 29, 2019 | May 23, 2019 | Jun. 06, 2019 | Jan. 31, 2019 | Dec. 31, 2018
Subsequent Event [Line Items] |  |  |  |  |
Debt instrument, principal face amount |  |  |  |  | $ 4,500,000
Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Common stock subscription price per share |  |  |  | $ 1.75 |
Interest rate on promissory note |  | 8.00% | 8.00% |  |
Aggregate borrowed amount |  | $ 3,300,000 |  |  |
Debt instrument, principal face amount |  | $ 3,300,000 | $ 2,000,000 |  |
Maturity period |  | 6 months |  |  |
Subsequent Event [Member] | Pre-Funded Series D Warrants [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Shares issuable upon warrants exercised |  |  |  | 7.9 |
Number of warrants available for cancellation |  |  | 53.4 |  |
Subsequent Event [Member] | Series D Warrants [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of warrants available for cancellation |  |  | 3.9 |  |
Subsequent Event [Member] | Series D Preferred Shares [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock, stated value | $ 1,160,000 |  |  |  |
Proceeds from exchanage of preferred stock | 400,000 |  |  |  |
Issuance of senior secured promissory note in exchange of preferred stock | $ 1,560,000 |  |  |  |
Interest rate on promissory note | 8.00% |  |  |  |
Maturity date | Apr. 01, 2020 |  |  |  |
Subsequent Event [Member] | Maximum [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Common stock subscription price |  |  |  | $ 50,000,000 |

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- Definition Common stock subscription price per share. + References No definition available. + Details
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- Definition Issuance of senior secured promissory note in exchange of preferred stock. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Monetary value of common stock allocated to investors to buy shares of a new issue of common stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65888546&loc=d3e21300-112643 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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