BORROWING ARRANGEMENTS - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 31, 2012
Line of Credit Facility [Line Items]
Loan and Security Agreement expiration date	Oct. 31, 2012	[1]
Credit facility agreement	$ 1.0
Credit facility outstanding	34
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Secured revolving credit facility initial aggregate principal amount	40.0
Permitted increase in aggregate principal amount	20.0
Loan and Security Agreement expiration date	Jan. 31, 2010
Credit facility amendment date	2012-08-16
borrowings outstanding	0
letters of credit outstanding amount	$ 0.2

[1] As Restated