Annual report pursuant to Section 13 and 15(d)

Contingencies (Details)

v3.3.0.814
Contingencies (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 31, 2015
USD ($)
Apr. 22, 2014
USD ($)
Nov. 30, 2012
Jun. 30, 2004
Apr. 30, 2014
USD ($)
Jul. 31, 2015
USD ($)
Jul. 31, 2014
USD ($)
Jun. 20, 2014
USD ($)
Contingencies (Details) [Line Items]                
Gain Contingency, Patents Allegedly Infringed upon, Number       6        
Number of Licensee Patents 4         4    
Gain Contingency, Patents Found Not Infringed upon, Number     1          
Gain Contingencies Prejudgement Interest           $ 12,500    
Gain (Loss) Related to Litigation Settlement $ 170         11,458 $ 3,100  
Estimated Litigation Liability, Current 10,000         10,000    
Payments for Legal Settlements           $ 11,500 $ 3,100  
Perkin Elmer [Member]                
Contingencies (Details) [Line Items]                
Escrow Deposit               $ 7,000
Luminex [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement, Amount 7,100              
Siemens [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement, Amount 9,500              
Royalty Revenue 1,000              
Agreement [Member] | Affymetrix Inc [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement, Amount   $ 5,100            
Proceeds from Legal Settlements   4,300            
Litigation Settlement, Expense   $ 800            
Subpoena [Member]                
Contingencies (Details) [Line Items]                
Investigation Period           The time period initially covered by the investigation was from 2004 through 2011.    
Estimated Litigation Settlement Amount         $ 2,000      
Period Over Which Settlement Amount Has to Be Paid         5 years      
Estimated Litigation Liability, Current 400         $ 400    
Estimated Litigation Liability, Noncurrent 1,200         1,200    
Additional Payment of Litigation Settlement Amount           $ 1,500    
Percentage of Additional Payment of Litigation Settlement Amount over Additional Capital Receipt           20.00%    
Subsequent Event [Member] | Affymetrix Inc [Member]                
Contingencies (Details) [Line Items]                
Payments for Legal Settlements           $ 10,000    
Indemnification Agreement [Member]                
Contingencies (Details) [Line Items]                
Gain Contingency, Unrecorded Amount $ 48,500         $ 48,500    
Minimum [Member] | Siemens [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement Period 2015              
Minimum [Member] | Subpoena [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement Period           2004    
Amount of Additional Capital Receipt Condition for Litigation Settlement           $ 10,000    
Maximum [Member] | Siemens [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement Period 2019              
Maximum [Member] | Subpoena [Member]                
Contingencies (Details) [Line Items]                
Litigation Settlement Period           2014