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Debt (Schedule Of Minimum Principal Payments) (Details) - USD ($)
$ in Thousands
Jul. 31, 2016
Jul. 31, 2015
Debt Instrument [Line Items]    
2017 $ 2,418  
2018 2,793  
2019 2,142  
2020 1,815  
Notes payable principal 9,168 $ 10,529
Term Loan [Member] | SVB Modification Agreement [Member]    
Debt Instrument [Line Items]    
2017 832  
2018 1,134  
2019 1,211  
2020 1,815  
Notes payable principal 4,992  
Promissory Note [Member] | TCS Notes [Member]    
Debt Instrument [Line Items]    
2017 965  
2018 1,014  
2019 261  
Notes payable principal 2,240  
Promissory Note [Member] | DCi Notes [Member]    
Debt Instrument [Line Items]    
2017 621  
2018 645  
2019 670  
Notes payable principal $ 1,936