Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities, Other Current Liabilities and Other Liabilities (Details) - Accrued liabilities

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Accrued Liabilities, Other Current Liabilities and Other Liabilities (Details) - Accrued liabilities (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2013
Jul. 31, 2012
Accrued liabilities [Abstract]    
Legal $ 3,104 $ 1,475
Payroll, benefits, severance and commissions 4,794 5,125
Research and development 721 696
Professional fees 863 901
Other 2,294 1,621
$ 11,776 $ 9,818