Quarterly report pursuant to Section 13 or 15(d)

Contingencies (Details)

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Contingencies (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 21 Months Ended
Nov. 30, 2012
Jun. 30, 2004
Jun. 30, 2004
Oct. 31, 2013
Contingencies (Details) [Line Items]        
Loss Contingency, Number of Defendants     6  
Loss Contingency, New Claims Filed, Number     6  
Gain Contingency, Patents Allegedly Infringed upon, Number   6    
Number of Licensee Patents   4 4  
Gain Contingency, Patents Found Not Infringed upon, Number 1      
Additional Recovery Related to Prejudgment Interest       Prejudgment interest should provide for additional recovery in the tens of millions of dollars.
Indemnification Agreement [Member]
       
Contingencies (Details) [Line Items]        
Gain Contingency, Unrecorded Amount (in Dollars)       $ 48.5