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The Company and Summary of Significant Accounting Policies (Details 2) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
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 $ 0 $ 6,000 $ 0 $ 47,000
Net loss per share        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount     9,363,000 10,226,000