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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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cash equal to difference between offer amount and principal amount.

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Debt instrument maturity year.

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Debt instrument repurchase period.

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Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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Fair value amount of debt instrument that was repurchased.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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