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The Company and Summary of Significant Accounting Policies (Details 2) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Revenue Recognition        
Threshold purchase return percentage by distributors for slow, non-moving or obsolete inventory     10.00%  
Specified period for return of threshold percentage of purchases by distributors for slow, non-moving or obsolete inventory     6 months  
Support and maintenance revenue recognition period     12 months  
Licensing revenue $ 6,000 $ 100,000 $ 47,000 $ 288,000
Per Share Amounts        
Anti-dilutive securities excluded from computation of diluted net loss per share     10,226,000 10,892,000