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Deferred Revenue
12 Months Ended
Dec. 31, 2012
Deferred Revenue [Abstract]  
Deferred Revenue
8. 
Deferred Revenue
 
As of December 31, 2012 and 2011, we have $2.1 million and $1.5 million, respectively, of deferred license fee revenue related to prepayments for future license fees from three and one customers, respectively, and a total of $0.6 million and $0.4 million, respectively, of deferred engineering development fees from thirteen and four customers, respectively. We defer the license fees until we have met all accounting requirements for revenue recognition as per unit royalty products are distributed or licensed by the Company’s customers and the engineering development fee revenue until such time as the engineering work has been completed and accepted by our customers.