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Subsequent Events - Additional Information (Detail) - USD ($) | Feb. 13, 2020 | Jan. 15, 2020 | Feb. 19, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Subsequent Event [Line Items] |  |  |  |  |
Common stock, par value |  |  |  | $ 0.001 | $ 0.001
Common stock, shares outstanding |  |  |  | 12,967,338 | 9,422,143
Preferred stock, shares outstanding |  |  |  | 0 | 0
Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Common stock, shares outstanding |  |  | 16,069,562 |  |
Subsequent Event [Member] | Common Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Convertible preferred stock, shares issued upon conversion |  |  | 3,796,000 |  |
Subsequent Event [Member] | Series X Preferred Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Preferred stock, shares outstanding |  |  | 3,796 |  |
Subsequent Event [Member] | Warrant Exercise Agreements [Member] | Warrants [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Warrants to purchase common stock |  | 6,898,224 |  |  |
Warrant reduced exercise price per share |  | $ 0.715 |  |  |
Warrant additional exercise price per share |  | $ 0.125 |  |  |
Common stock shares gross proceeds value |  | $ 5,800,000 |  |  |
Subsequent Event [Member] | Warrant Exercise Agreements [Member] | Common Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Warrant exercise price per share |  | $ 0.72 |  |  |
Warrants exercisable term |  | 5 years 6 months |  |  |
Subsequent Event [Member] | Warrant Exercise Agreements [Member] | Common Stock [Member] | Maximum [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Warrants to purchase common stock |  | 6,898,224 |  |  |
Subsequent Event [Member] | Exchange Agreement [Member] | Exchanging Stockholders [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Reimbursement of expenses | $ 25,000 |  |  |  |
Conversion of stock blocker provision percentage | 9.99% |  |  |  |
Subsequent Event [Member] | Exchange Agreement [Member] | Exchanging Stockholders [Member] | Common Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Conversion of stock, shares converted | 3,796,000 |  |  |  |
Common stock, par value | $ 0.001 |  |  |  |
Convertible preferred stock, shares issued upon conversion of each share | 1,000 |  |  |  |
Subsequent Event [Member] | Exchange Agreement [Member] | Exchanging Stockholders [Member] | Series X Preferred Stock [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Conversion of stock, shares issued | 3,796 |  |  |  |

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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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