Revenue Recognition: Our terms provide that customers are obligated to pay for products sold to them within a specified number of days from the date that title to the products is transferred to the customers. Our standard terms are typically net 30 days. We recognize revenue when transfer of title occurs, risk of ownership passes to a customer at the time of shipment or delivery depending on the terms of the agreement with a particular customer and collection is reasonably assured. The sale price of our products is substantially fixed and determinable at the date of the sale based upon purchase orders generated by a customer and accepted by us. We occasionally enter into prototype development contracts with customers. In such cases, revenue is recognized using either (a) the proportional effort method based on the relationship of costs incurred to date to the total estimated cost to complete a contract, or (b) where appropriate, the milestone method, if milestones are clearly identifiable and substantive. During the first quarter of 2011, we entered into a prototype development agreement to design, build and integrate our IsoTorque differential into the product of a customer for total consideration of $120,000. Milestones include completion of design, manufacturing of a prototype, and installation / integration of the prototype. The payment required for each milestone was considered to be substantive based on the fact that performance required by us in order to achieve the milestone enhanced the value of the item delivered and is reasonable in relation to all of the deliverables. The first milestone consisted of completion and delivery of the design for the prototype, which was completed and delivered during the first quarter of 2011 and resulted in the recognition of revenue in the amount of $30,000, as well as the related costs incurred to complete this milestone. The second milestone consisted of the manufacture and delivery of two prototype differentials to our customer, which was completed in March 2012 and