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International Business Machines Corporation Alliance (Tables) | 9 Months Ended
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Sep. 30, 2011
Changes in the Alliance Agreement Liability | Changes in the Alliance agreement liability during the nine months ended September 30, 2011 were as follows (in thousands):
|  |  | September 30, |
|  | Alliance Agreement Liability |
Balance as of December 31, 2010 |  | $ | 22,584 |
Costs related to fulfillment of technical enablement milestones |  |  | (317 | )
Balance as of September 30, 2011 |  | $ | 22,267 |

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- Definition Tabular disclosure of the Alliance agreement liability. + Details
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Data Type: | nonnum:textBlockItemType
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Period Type: | duration