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v3.20.1

Long-Term Debt - Working Capital Revolver Loan and Senior Secured Notes - Additional Information (Detail) - USD ($) |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Jun. 21, 2019 | Apr. 25, 2018 | Mar. 31, 2020 | Feb. 28, 2019
Working Capital Revolver Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum amount of revolving credit facility |  |  |  | $ 75,000,000
Amount available for borrowing |  |  | $ 20,500,000 |
Maturity date |  |  | Feb. 26, 2024 |
Springing Financials Covenant [Member] | Working Capital Revolver Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Working capital revolver loan requirements |  |  | Borrowers must maintain a minimum fixed charge coverage ratio of not less than 1.00 to 1.00. |
Maximum revolver commitment available, percentage |  |  | 10.00% |
Loan requirements description |  |  | Less than 10.0% of the total revolver commitments. |
Fixed charge coverage ratio |  |  | 100.00% |
9.625% Senior Secured Notes Due 2023 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date |  |  | May 01, 2023 |
Debt issued - principal amount | $ 35,000,000 | $ 400,000,000 |  |
Debt instrument, interest rate | 9.625% | 9.625% |  |
Debt instrument, maturity term | 2023 | 2023 |  |
Debt instrument issued price percentage | 102.125% | 99.509% |  |
Debt instrument, frequency of interest payment |  |  | Interest is to be paid semiannually in arrears on May 1st and November 1st |
5.25% Secured Promissory Note Due 2021 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date |  |  | Mar. 31, 2021 |
Secured promissory note, payment term |  |  | Principal and interest are payable in monthly installments. |
5.17% Secured Promissory Note Due 2023 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, frequency of interest payment |  |  | monthly |
Final balloon payment |  |  | $ 6,100,000 |
Maturity month and year |  |  | 2023-05 |
8.32% Secured Financing Due 2023 [Member] | El Dorado Chemical Company [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date |  |  | Jun. 30, 2023 |
Debt instrument, frequency of interest payment |  |  | Principal and interest are payable in 48 equal monthly installments with a final balloon payment of approximately $3 million due in June 2023 |
Final balloon payment |  |  | $ 3,000,000 |
Secured Loan Agreement [Member] | El Dorado Chemical Company [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, frequency of interest payment |  |  | Under the terms of the note, principal and interest are payable in 60 equal monthly installments. |
Letter of Credit [Member] | Working Capital Revolver Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum amount of revolving credit facility |  |  |  | $ 10,000,000

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