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Loans Payable - Summary of Debt Premium (Parenthetical) (Detail) - Monaco Notes [Member]
Sep. 30, 2018
USD ($)
Debt Instrument [Line Items]  
Face amount of new loans $ 2,800,000
Paid-in Capital [Member]  
Debt Instrument [Line Items]  
Debt premium recorded to additional paid-in capital $ 817,858