NOTE 8  Commitments and Contingencies Purchase commitments  As of September 30, 2018, we had approximately $11.9 million in non-cancelable purchase contracts related to capital expenditures, primarily related to our manufacturing facilities in Asia. As of September 30, 2018 we also had a commitment to purchase approximately $130.0 million of wafers to be used in our manufacturing process. These wafer purchases will occur between 2018 and 2020. Defined Benefit Plan - We have a contributory defined benefit plan that covers certain employees in the United Kingdom. As of September 30, 2018, the unfunded liability for this defined benefit plan was approximately $25.1 million. We are obligated to make annual contributions, each year through December 2029, of approximately GBP 2 million (approximately $2.6 million based on a GBP: USD exchange rate of 1.3:1). The trustees are required to review the funding position every three years, and the most recent review was carried out as of April 5, 2016. The outcome of a review can result in a change in the amount of the payment. Contingencies  From time to time, we are involved in various legal proceedings that arise in the normal course of business. While we intend to defend any lawsuit vigorously, we presently believe that the ultimate outcome of any current pending legal proceeding will not have any material adverse effect on our financial position, cash flows or operating results. However, litigation is subject to inherent uncertainties, and unfavorable rulings could occur. An unfavorable ruling could include monetary damages, which could impact on our business and operating results for the period in which the ruling occurs or future periods. Based on information available, we evaluate the likelihood of potential outcomes of all pending disputes. We record an appropriate liability when the amount of any liability associated with a pending dispute is deemed probable and reasonably estimable. In addition, we do not accrue for estimated legal fees and other directly related costs as they are expensed as incurred. The Company is not currently a party to any pending litigation that the Company considers material.