| Short-Term Notes Payable - Summary of Short Term Notes Payable (Parenthetical) (Detail) - Short Term Note Payable [Member] - USD ($) | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2018 | Dec. 31, 2017 | |
| Product Liability Insurance Financing [Member] | ||
| Short-term Debt [Line Items] | ||
| Debt instrument face amount | $ 28,915 | $ 31,985 | 
| Monthly installment including principal and interest | $ 2,696 | $ 3,290 | 
| Interest rate bearing | 5.09% | 6.18% | 
| Maturity date | Feb. 10, 2019 | Jan. 10, 2018 | 
| Directors' and Officers' Liability Insurance Financing [Member] | ||
| Short-term Debt [Line Items] | ||
| Debt instrument face amount | $ 215,575 | $ 140,062 | 
| Monthly installment including principal and interest | $ 20,115 | $ 13,059 | 
| Interest rate bearing | 5.24% | 5.09% | 
| Maturity date | Jun. 24, 2019 | Jun. 24, 2018 | 
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of the required periodic payments including both interest and principal payments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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