Long-Term Debt - Schedule of Revolving Credit Facility and Long-Term Debt (Parenthetical) (Detail)	Dec. 31, 2019	Dec. 31, 2018
5.25% Working Capital Revolver Loan [Member]
Debt Instrument [Line Items]
Line of credit facility, interest rate	5.25%	5.25%
5.25% Secured Promissory Note Due 2021 [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate	5.25%	5.25%
6.03% Secured Promissory Note Due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate	6.03%	6.03%
8.32% Secured Financing Due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate	8.32%	8.32%
8.76% Secured Loan Agreement [Member]
Debt Instrument [Line Items]
Long-term debt, effective Interest Rate	8.76%	8.76%