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Restructuring (Detail Textuals 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2013 General and administrative expense	Apr. 30, 2012 General and administrative expense	Apr. 30, 2013 Severance	Apr. 30, 2012 Severance	Apr. 30, 2013 Employee Relocation	Apr. 30, 2012 Employee Relocation
Restructuring Cost and Reserve [Line Items]
Restructuring-related costs	$ 300	$ 300	$ 859	$ 1,400	$ 700	$ 2,100

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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