| Revenue recognition | | The Company recognizes revenue when persuasive evidence of an arrangement exists, delivery has occurred, price is fixed or determinable and collectability of the selling price is reasonably assured. Delivery occurs when risk of loss is passed to the customer, as specified by the terms of the applicable customer agreements. Generally, this occurs when the product is delivered to the customer. The Company’s standard business practice regarding sales returns as reflected in its standard terms and conditions are that all sales are final and the Company does not accept any returns except for warranty claims. The Company presently does not have any agreements with any customer that allows for returns under any other circumstances. However, during the period the Company repurchased on several occasions product from one customer in order to fulfill sales to a second customer. While the Company has no obligation or plans to do so in the future, the Company concluded that these repurchases constitute an implied right of return with this customer. When an implied right of return exists, the Company recognizes revenue on the sell through-method. Under this method, revenue is not recognized upon delivery of the inventory components. Instead, the Company records deferred revenue upon delivery and recognizes revenue when the inventory components are sold through to the end user. Deferred revenue at March 31, 2012 related to this customer was $554,000 and represents amounts not yet sold through by our customer. The related product cost of $497,000 at March 31, 2012, is included in inventory. In addition, $75,000 received from a different customer in the quarter ended March 31, 2012 for a small non recurring engineering project is included in deferred revenue at March 31, 2012, pending completion of the project. The Company evaluates its exposure to sales returns and warranty issues based on historical information. The Company did not record an allowance for sales returns or warranty issues during 2011 and 2010. |