RESTRUCTURING, NET - Additional Information (Detail) (USD $)	3 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,479,000	$ 755,000	[1]
Restructuring charge related to contractual obligations		100,000
Reduction of Workforce [Member]
Restructuring Cost and Reserve [Line Items]
Number of workforce reduction	62
Americas [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	300,000
Asia [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	700,000
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	500,000
Raleigh, North Carolina [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge related to workforce reduction		200,000
Raleigh, North Carolina [Member] | Reduction of Workforce [Member]
Restructuring Cost and Reserve [Line Items]
Number of workforce reduction		9
China [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge related to workforce reduction		$ 500,000
China [Member] | Reduction of Workforce [Member]
Restructuring Cost and Reserve [Line Items]
Number of workforce reduction		144

[1] As Restated