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SHARE-BASED PAYMENTS - Summary of Share-Based Compensation Expense Related to Employee Stock Options, Employee Stock Purchases and Nonvested Shares (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based compensation expense	$ 493	$ 882
Cost of Sales [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based compensation expense	50	96
Selling, general and administrative [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Share-based compensation expense	$ 443	$ 786

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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