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Share-based compensation arrangement by share-based payment award vesting number of shares issuable.

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Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Description of service or performance condition required to be met for earning right to award under share-based payment arrangement. Includes, but is not limited to, combination of market, performance or service condition.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of shares issued under share-based payment arrangement.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Reduction in the number of shares during the period as a result of a reverse stock split.

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Number of share options (or share units) exercised during the current period.

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Stockholders' Equity - Additional Information (Detail)											3 Months Ended				9 Months Ended
Stockholders' Equity - Additional Information (Detail)	Mar. 15, 2019 USD ($) $ / shares shares	Mar. 14, 2019 shares	Oct. 15, 2018 $ / shares	Jun. 15, 2018 shares	Mar. 15, 2018 USD ($) $ / shares shares	Oct. 31, 2017 shares	Mar. 07, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) $ / shares	Feb. 23, 2016 $ / shares	Jan. 07, 2016 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Mar. 31, 2019 shares	Sep. 30, 2018 USD ($)	Mar. 31, 2016 USD ($) shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($) shares	Nov. 04, 2016 shares
Class Of Stock [Line Items]
Reverse stock split		1-for-10 reverse stock split
Stock split, conversion ratio		0.10
Reverse stock split, shares issued		0
Percentage of conversion of convertible notes													5.75%			5.75%
Stock options, exercised															0
Stock options, expired											1,500
Stock options expired, weighted average exercise price \| $ / shares											$ 171.60
Mr. Haugh
Class Of Stock [Line Items]
Employment resigned date				Jun. 15, 2018
Warrant
Class Of Stock [Line Items]
Share based compensation awards granted in period															0	0
Stock Options
Class Of Stock [Line Items]
Compensation expense (benefit) related to stock grants \| $															$ 0	$ 0
Stock options granted															0	0
Restricted Stock
Class Of Stock [Line Items]
Share based compensation awards granted in period															329,145
Share based compensation awards vesting period															3 years
Compensation cost not yet recognized, period for recognition															3 years
Value of common stock shares repurchased in connection with net share settlement of restricted stock grants and option exercises \| $															$ 100,000	$ 100,000
Granted \| $ / shares															$ 1.70
Share based compensation awards forfeited in period															296
Retention Stock
Class Of Stock [Line Items]
Compensation expense (benefit) related to stock grants \| $													$ 200,000		$ 100,000	$ 700,000
Share based compensation awards granted in period										7,500,000
Share based compensation awards vesting period										3 years
Compensation cost not yet recognized, period for recognition															2 years 6 months
Share based compensation awards granted in period, value \| $										$ 1,300,000
Grant date fair value of award issued \| $ / shares										$ 42.50
Share-based compensation award, shares issued upon expiration of grant										0
Compensation cost not yet recognized \| $											$ 300,000				$ 300,000
Retention Stock \| Mr. Haugh
Class Of Stock [Line Items]
Share-based compensation award, vesting shares Issuable				0
Employment Inducement Award \| Mr. Haugh
Class Of Stock [Line Items]
Grant date fair value of award issued \| $ / shares			$ 1.80						$ 57.50
5.75% Senior Subordinated Notes Due August 2023
Class Of Stock [Line Items]
Percentage of conversion of convertible notes		5.75%									5.75%		5.75%		5.75%	5.75%
Maximum \| Restricted Stock
Class Of Stock [Line Items]
Value of common stock shares repurchased in connection with net share settlement of restricted stock grants and option exercises \| $											$ 100,000		$ 100,000
Maximum \| Retention Stock
Class Of Stock [Line Items]
Compensation expense (benefit) related to stock grants \| $											$ 100,000
2016 Omnibus Incentive Plan
Class Of Stock [Line Items]
Common stock reserved for issuance																	200,000
Number of additional common stock shares approved for issuance under Incentive Plan						190,000
2016 Omnibus Incentive Plan \| Maximum
Class Of Stock [Line Items]
Common stock reserved for issuance											100,000				100,000
Long-Term Incentive Plan \| Restricted Stock
Class Of Stock [Line Items]
Compensation expense (benefit) related to stock grants \| $											$ 200,000		200,000		$ 700,000	$ 1,900,000
Long Term Incentive Compensation Plan \| Restricted Stock
Class Of Stock [Line Items]
Compensation cost not yet recognized \| $											500,000				500,000
2016 LTIP
Class Of Stock [Line Items]
Share based compensation awards granted in period														100,000
Share based compensation awards granted in period, value \| $								$ 5,200,000						$ 5,200,000
Share-based compensation award, shares issued upon expiration of grant												100,000
Granted \| $ / shares								$ 73.10
2016 LTIP \| Performance Shares
Class Of Stock [Line Items]
Compensation expense (benefit) related to stock grants \| $													$ (2,100,000)			$ (2,800,000)
Compensation cost not yet recognized \| $											400,000				400,000
2016 LTIP \| Maximum \| Performance Shares
Class Of Stock [Line Items]
Compensation expense (benefit) related to stock grants \| $											$ (100,000)				$ (100,000)
Compensation cost not yet recognized, period for recognition															2 years
2017 LTIP
Class Of Stock [Line Items]
Share based compensation awards granted in period							0.1
Share based compensation awards granted in period, value \| $							$ 6,600,000
Granted \| $ / shares							$ 75.20
2017 LTIP \| RSUs
Class Of Stock [Line Items]
Share based compensation award, description of vesting rights															one third annually
2017 LTIP \| Performance Shares
Class Of Stock [Line Items]
Share based compensation award, description of vesting rights															based on performance metrics approved by the Compensation Committee
2017 LTIP \| Maximum
Class Of Stock [Line Items]
Share based compensation awards forfeited in period															100,000
2017 LTIP \| Maximum \| Performance Shares
Class Of Stock [Line Items]
Weighted average contractual term of awards outstanding and exercisable															1 year
2018 LTIP
Class Of Stock [Line Items]
Share based compensation awards granted in period					200,000
Share based compensation awards vesting period					15 days
Share based compensation awards granted in period, value \| $					$ 3,100,000
Granted \| $ / shares					$ 13.80
Share based compensation award, description of vesting rights															48 equal semi-monthly installments
Share based compensation cash awards, aggregate amount. \| $					$ 3,100,000
2018 LTIP \| Maximum
Class Of Stock [Line Items]
Share based compensation awards forfeited in period															100,000
2018 LTIP \| Maximum \| Performance Shares
Class Of Stock [Line Items]
Weighted average contractual term of awards outstanding and exercisable															2 years
2019 LTIP
Class Of Stock [Line Items]
Share based compensation awards granted in period	400,000
Share based compensation awards granted in period, value \| $	$ 800,000
Granted \| $ / shares	$ 2.02
Share based compensation cash awards, aggregate amount. \| $	$ 1,000,000
2019 LTIP \| Chief Executive Officer and President
Class Of Stock [Line Items]
Share based compensation awards granted in period	300,000
Share based compensation awards vested in period, fair market value \| $	$ 300,000
2019 LTIP \| Maximum \| Performance Shares
Class Of Stock [Line Items]
Weighted average contractual term of awards outstanding and exercisable															2 years