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Deferred Revenue (Details) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
Deferred Revenue (Textual) |  |
Engineering development fees recorded as deferred revenue | $ 2,594,000 | $ 1,906,000
Description of deferred engineering development fees and deferred license fee revenue | Deferred license fee revenue related to a prepayment for future license fees from one customer and a total of $0.3 million and $0.4 million, respectively, of deferred engineering development fees from six and four customers, respectively. We are deferring the engineering development fee revenue until such time as the engineering work has been completed. |
Future License Fees From One Customer [Member] |  |
Deferred Revenue (Textual) |  |
Engineering development fees recorded as deferred revenue | 2,300,000 | 1,500,000
Deferred Engineering Development Fees From Four Customers [Member] |  |
Deferred Revenue (Textual) |  |
Deferred engineering development fees from second set of customers | 300,000 | 300,000
Deferred engineering development fees from first set of customers | $ 400,000 | $ 400,000

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