Notes Payable - Schedule of Notes Payable (Parenthetical) (Detail) - Notes Payable [Member]
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1 Months Ended |
12 Months Ended |
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Aug. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Aug. 31, 2017 |
| 8% Secured Promissory Notes Due February 2019 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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8.00%
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8.00%
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8.00%
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| Notes payable, maturity date |
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Feb. 28, 2019
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Feb. 28, 2019
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| 0% Convertible Notes Due January 2021 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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0.00%
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0.00%
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| Notes payable, maturity date |
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Jan. 31, 2021
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Jan. 31, 2021
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| 4% Promissory Note Due December 2020 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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4.00%
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4.00%
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| Notes payable, maturity date |
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Dec. 31, 2020
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Dec. 31, 2020
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| 8% Promissory Note Due March 2021 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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8.00%
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8.00%
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8.00%
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| Notes payable, maturity date |
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Mar. 31, 2021
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Mar. 31, 2021
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| 0% Promissory Note Due April 2019 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
0.00%
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0.00%
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0.00%
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| Notes payable, maturity date |
Apr. 30, 2019
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Apr. 30, 2019
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Apr. 30, 2019
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| 12% Convertible Notes Due October 2019 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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Oct. 31, 2019
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Oct. 31, 2019
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| 12% Convertible Notes Due November 2019 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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Nov. 30, 2019
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Nov. 30, 2019
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| 12% Convertible Notes Due May 2020 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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May 31, 2020
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May 31, 2020
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| 12% Convertible Notes Due July 2020 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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Jul. 31, 2020
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Jul. 31, 2020
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| 12% Convertible Notes Due August 2020 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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Aug. 31, 2020
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Aug. 31, 2020
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| 12% Convertible Notes Due September 2020 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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Sep. 30, 2020
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Sep. 30, 2020
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| 12% Secured Promissory Note Due September 2020 [Member] |
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| Debt Instrument [Line Items] |
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| Notes payable, interest rate |
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12.00%
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12.00%
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| Notes payable, maturity date |
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Sep. 30, 2020
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Sep. 30, 2020
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