of the eligible option.

 

A total of 28.5 million options were tendered under the offer for an aggregate cash purchase price of $78.1 million, which was paid in exchange for the cancellation of the eligible options.  As a result of the tender offer, we incurred a charge during fiscal year 2010 of $140.2 million consisting of $124.1 million related to the remaining unamortized stock based compensation expense associated with the unvested portion of the options tendered in the offer, $11.6 million related to stock-based compensation expense resulting from amounts paid in excess of the fair value of the underlying options, plus $4.5 million related to associated payroll taxes, professional fees and other costs.



Critical Accounting Policies and Estimates

 

Management’s discussion and analysis of financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, cost of revenue, expenses and related disclosure of contingencies. On an on-going basis, we evaluate our estimates, including those related to revenue recognition, cash equivalents and marketable securities, accounts receivable, inventories, income taxes, goodwill, stock-based compensation, warranty liabilities, litigation, investigation and settlement costs and other contingencies. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities.

 

We believe the following critical accounting policies affect our significant judgments and estimates used in the preparation of our consolidated financial statements. Our management has discussed the development and selection of these critical accounting policies and estimates with the Audit Committee of our Board of Directors, or Board.  The Audit Committee has reviewed our disclosures relating to our critical accounting policies and estimates in this Annual Report on Form 10-K.  

  

Revenue Recognition

 

Product Revenue



We recognize revenue from product sales when persuasive evidence of an arrangement exists, the product has been delivered, the price is fixed or determinable, and collection is reasonably assured. For most sales, we use a binding purchase order and in certain cases we use a contractual agreement as evidence of an arrangement. We consider delivery to occur upon shipment provided title and risk of loss have passed to the customer based on the shipping terms. At the point of sale, we assess whether the arrangement fee is fixed or determinable and whether collection is reasonably assured. If we determine that collection of a fee is not reasonably assured, we defer the fee and recognize revenue at the time collection becomes reasonably assured, which is generally upon receipt of payment.

 

Our policy on sales to certain distributors, with rights of return, is to defer recognition of revenue