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Accounts Receivable and Other, Net - Summary of Accounts Receivable (Detail) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total accounts receivable, net | $ 789,421 | $ 232,380
Trade [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, gross | 9,466 | 7,376
Related Party [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, gross | 664,596 | 183,453
Other [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts receivable, gross | $ 115,359 | $ 41,551

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