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Indebtedness - Additional Information (Detail) - USD ($) | Mar. 07, 2018 | Feb. 02, 2018 | Jul. 31, 2017
--- | --- | --- | ---
Tendered Notes |  |  |
Debt [Line Items] |  |  |
Debt Instrument Face Amount | $ 46,023 |  |
Consideration received by holders per principal amount of notes tendered, percentage | 100.00% |  |
Cash equal to difference between offer amount and principal amount | $ 24,650,000 |  |
Offer | Senior Secured Notes |  |  |
Debt [Line Items] |  |  |
Debt instrument fixed interest rate |  | 8.00% |
Debt instrument maturity year |  | 2022 |
Predecessor | Offer |  |  |
Debt [Line Items] |  |  |
Debt instrument repurchase period |  |  | 60 days
Percentage of proceeds from Asset Sales, net of commission paid |  |  | 65.00%
Minimum | Predecessor | Offer |  |  |
Debt [Line Items] |  |  |
Net proceeds realized from asset sales exceed amount |  |  | $ 10,000,000
Maximum | Offer | Senior Secured Notes |  |  |
Debt [Line Items] |  |  |
Debt Instrument Face Amount |  | $ 24,700,000 |

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