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The Company and Summary of Significant Accounting Policies (Details 2) (USD $) | 12 Months Ended |  |  |  | 12 Months Ended | 1 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Minimum | Dec. 31, 2013 Maximum | Dec. 31, 2012 Purchased intangible assets | Dec. 31, 2013 Developed technology | Dec. 31, 2012 Developed technology | Dec. 31, 2013 Developed technology Minimum | Dec. 31, 2012 Developed technology Minimum | Dec. 31, 2013 Developed technology Maximum | Dec. 31, 2012 Developed technology Maximum | Dec. 31, 2012 Customer relationships | Dec. 31, 2013 Patent license | Dec. 31, 2012 Patent license | Dec. 31, 2011 Memory technology patents Item
Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of intangible assets sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 73
Life |  |  |  | 3 years | 7 years |  |  |  | 3 years | 3 years | 5 years | 5 years | 3 years | 7 years | 7 years |
Gross Carrying Amount | $ 10,020,000 | $ 10,410,000 |  |  |  | $ 9,630,000 | $ 9,240,000 | $ 9,240,000 |  |  |  |  | $ 390,000 | $ 780,000 | $ 780,000 |
Accumulated Amortization | 8,365,000 | 7,756,000 |  |  |  | 7,645,000 | 8,142,000 | 7,255,000 |  |  |  |  | 390,000 | 223,000 | 111,000 |
Net Carrying Amount | 1,655,000 | 2,654,000 |  |  |  | 1,985,000 | 1,098,000 | 1,985,000 |  |  |  |  |  | 557,000 | 669,000 |
Estimated aggregate amortization expense to be recognized in future |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2018 | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue Recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Support and maintenance revenue recognition period based on fair value established by VSOE | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per Share Amounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Anti-dilutive securities excluded from computation of diluted net loss per share | 10,072,000 | 10,384,000 | 9,015,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ (24,794,000) | $ (27,614,000) | $ 11,256,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Add: weighted-average common shares outstanding | 45,246,000 | 39,176,000 | 37,942,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Less: unvested common shares subject to repurchase |  |  | (81,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Total shares: basic | 45,246,000 | 39,176,000 | 37,861,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Add: weighted-average stock options outstanding (in shares) |  |  | 2,435,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Add: common shares subject to repurchase |  |  | 81,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total shares: diluted | 45,246,000 | 39,176,000 | 40,377,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ (0.55) | $ (0.70) | $ 0.30 |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted (in dollars per share) | $ (0.55) | $ (0.70) | $ 0.28 |  |  |  |  |  |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Period over which the Company expects its unrecognized tax benefits to not change significantly | 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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