Deferred Revenue

6 Months Ended

Jun. 30, 2014

Deferred Revenue [Abstract]

Deferred Revenue

3.   Deferred Revenue

As of June 30, 2014 and December 31, 2013, we had $2.5 million of deferred license fee revenue related to prepayments for future license fees from four and three customers, respectively, and a total of $0.9 million and $1.2 million, respectively, of deferred engineering development fees from sixteen and twenty-one 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 our customers and the engineering development fee revenue until such time as the engineering work has been completed and accepted by our customers.