We develop products in the United States and sell these products in North America, Europe, Asia, and Australia. In the three months ended March 31, 2007 and the year ended December 31, 2006, revenues from customers outside of the United States approximated 29% and 32%, respectively, of total revenues. Generally, our sales are made in the local currency of our customers. As a result, our financial results and cash flows could be affected by factors such as changes in foreign currency exchange rates or weak economic conditions in foreign markets. We rarely use derivative instruments to hedge against foreign exchange risk. As such, we are exposed to market risk from fluctuations in foreign currency exchange rates, principally from the exchange rate between the U.S. dollar and the Euro and the British pound. We manage exposure to variability in foreign currency exchange rates primarily due to the fact that liabilities and assets, as well as revenues and expenses, are denominated in the local currency. However, different durations in our funding obligations and assets may expose us to the risk of foreign exchange rate fluctuations. We have not entered into any derivative instrument transactions to manage this risk. Based on our overall foreign currency rate exposure at March 31, 2007, we do not believe that a hypothetical 10% change in foreign currency rates would materially adversely affect our financial position or results of operations. We do not consider our cash equivalents to be subject to interest rate risk due to their short maturities.