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Contract Term

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Options Exercisable In Years

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Share Based Compensation Arrangement by Share Based Payment Award Additional Shares Issued In Period

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Restriction Period From Date Of Grant

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Share Based Compensation Arrangement By Share Based Payment Award, Number Of Plans

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Share Based Compensation Arrangement by Share Based Payment Award Options Exercisable Rate

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Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value Expected To Vest

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Stock Issued During Period Shares Restricted Stock Award Vested

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Aggregate number of common shares reserved for future issuance.

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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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The amount of plan compensation cost recognized during the period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Purchase price of common stock expressed as a percentage of its fair value.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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SHARE-BASED PAYMENTS - Additional Information (Detail) $ in Millions		12 Months Ended
	Dec. 15, 2017 shares	Jul. 31, 2019 USD ($) plan shares	Jul. 31, 2018 USD ($) shares	Dec. 08, 2010 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans \| plan		2
Exercisable rate of options granted (in percentage)		25.00%
2010 Plan number of shares pursuant to stock options granted (in shares)		0	0
Stock options vested and expected to vest (in shares)		300,000
Weighted-average remaining contractual term (in years)		1 year 1 month 5 days
Non vested stock compensation expense \| $		$ 1.2	$ 10.7
Grant date fair value of nonvested stock \| $		0.5	$ 11.5
Unrecognized compensation cost related to nonvested stock \| $		$ 0.3
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock shares available for future issuance (in shares)		109,000
Number of shares pursuant to stock options granted (in shares)		600,000
Common stock purchase price as a percentage of market value (in percentage)		85.00%
Shares issued under plan (in shares)		17,000	10,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms, share options granted (in years)		7 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period of cost expected to be expensed (in years)		4 months 18 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable terms (in years)		1 year
Term of restriction period (in years)		1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable terms (in years)		3 years
Term of restriction period (in years)		5 years
2005 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable terms (in years)		3 years
2005 Plan \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual terms, share options granted (in years)		10 years
2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
2010 Plan number of shares pursuant to stock options granted (in shares)		11,000,000
2010 Plan additional shares of common stock (in shares)				2,922,258
Common Stock shares available for future issuance (in shares)		4,498,546
2010 Plan \| Restricted Stock \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award granted (in shares)	4,000,000
Restricted stock award vested (in shares)	4,000,000
2010 Plan \| Market Performance Based Restricted Stock \| Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock award granted (in shares)	1,500,000
Restricted stock award vested (in shares)		1,000,000