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Formation and business of Audience, Inc. Audience, Inc. (we or us) was incorporated in the State of California in July 2000 and subsequently reincorporated in the State of Delaware in June 2011. In June 2002, we changed our name from Applied Neurosystems Corporation to Audience, Inc. We provide intelligent voice and audio solutions that improve voice quality and the user experience in mobile devices. We outsource the manufacture of our voice and audio processors to independent foundries and use third parties for assembly, packaging and test. We sell our voice and audio processors globally, directly to original equipment manufacturers (OEMs) and their contract manufacturers (CMs) and indirectly through distributors. In 2012, we also began to recognize royalty revenue for the use of our semiconductor intellectual property (processor IP) in the 2011 model of the mobile phones of a single OEM. On May 15, 2012, we closed our initial public offering (IPO) of 6,060,707 shares of our common stock inclusive of 270,180 shares of common stock sold by certain selling stockholders and the 790,527 shares of underwriters’ over-allotment option. The public offering price of the shares sold in the offering was $17.00 per share. The total gross proceeds from the offering to us were $98.4 million and after deducting underwriting discounts and commissions, the aggregate net proceeds received by us was approximately $91.5 million before offering expenses. We also received $81,000 from the stock options exercised by certain selling stockholders. Upon the closing of the IPO, all shares of our outstanding convertible preferred stock converted into shares of common stock on a one to one basis and all outstanding warrants to purchase convertible preferred stock converted into warrants to purchase shares of common stock.

2. Basis of presentation and summary of significant accounting policies Basis of presentation In the opinion of management, the accompanying unaudited condensed consolidated financial statements include all adjustments, consisting of normal recurring items, necessary for a fair statement of our financial statements for interim periods in accordance with accounting principles generally accepted in the United States (U.S. GAAP). The information included in this Quarterly Report on Form 10-Q should be read in conjunction with our consolidated financial statements and the accompanying notes included in our prospectus filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended (Securities Act) with the U.S. Securities and Exchange Commission (SEC) on May 10, 2012 (Prospectus). Our accounting policies are described in the “Notes to consolidated financial statements” in our Prospectus and updated, as necessary, in this Form 10-Q. The year-end condensed consolidated balance sheet data presented for comparative purposes was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. The results of operations for the three and nine months ended September 30, 2012 are not necessarily indicative of the operating results for the full year or for any other subsequent interim period. Basis of consolidation All intercompany transactions and balances have been eliminated upon consolidation. The functional currency of each of our subsidiaries is the U.S. dollar. Foreign currency gains or losses are recorded as other income (expenses), net in the condensed consolidated statements of income. Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an on-going basis, we evaluate our estimates, including those related to allowances for doubtful accounts receivable and sales returns, inventory write downs, useful lives of long-lived assets, valuation of deferred tax assets and uncertain tax positions, the measurement of stock-based compensation, the valuation of our various equity instruments, litigation investigation and settlement costs and other contingencies. We base our estimates and judgments on our historical experience, knowledge of current conditions and beliefs of what could occur in the future, considering available information. Actual results could differ from those estimates.   Concentration of risk As of September 30, 2012, two customers accounted for 57% and 27% of total accounts receivable. As of December 31, 2011, two customers comprised 74% and 15% of total accounts receivable, respectively. For the three and nine months ended September 30, 2012, Foxconn International Holdings, Ltd. and its affiliates (collectively, Foxconn), a CM, accounted for 14% and 15% of our total revenue, respectively, and 51% and 70% of our total revenue for the three and nine months ended September 30, 2011, respectively. Samsung Electronics Co., Ltd (Samsung), one of our OEMs, accounted for 55% and 45% of our total revenue for the three and nine months ended September 30, 2012, respectively, and 30% and 17% of our total revenue for the three and nine months ended September 30, 2011, respectively. Protek (Shanghai) Limited and its affiliates (collectively, Protek), a CM, accounted for less than 10% of our total revenue for both the three and nine months ended September 30, 2012, and 10% of our total revenue for both the three and nine months ended September 30, 2011. In addition, with respect to the 2011 model of its mobile phones, Apple Inc. (Apple) transitioned from the purchase of our processors to licensing of our processor IP for a royalty. We began to recognize royalty revenue in 2012, which accounted for 21% and 31% of our total revenue for the three and nine months ended September 30, 2012, respectively. No other OEM, CM or distributor accounted for 10% or more of our total revenue for the three and nine months ended September 30, 2012 and 2011. Deferred initial public offering costs Deferred IPO costs, consisting of legal, accounting and other fees and costs, were capitalized and included in “Prepaid and other current assets” on our consolidated balance sheet for periods presented prior to May 2012. Upon closing of our IPO on May 15, 2012, the aggregate deferred offering costs of $4.5 million were reclassified to stockholders’ equity. Revenue recognition We derive revenue from the direct sale of voice and audio processors to CMs and OEMs and indirect sales of processors to OEMs through distributors. We recognize revenue from sales to CMs and OEMs when persuasive evidence of an arrangement exists, the selling price is fixed or determinable, product delivery has occurred, which is when the risk and reward of ownership pass to the customer, and collectability of the resulting receivable is reasonably assured. These criteria are usually met when our processors are shipped to an OEM under INCOTERMS 2000 commercial terms, which are typically free carrier (FCA), delivered at terminal (DAT) and delivered at place (DAP) shipping point. We also ship a significant portion of our products to the inventory hubs of CMs and recognize the related revenue as the CMs notify us in writing that they have drawn our products from the hub, at which point delivery and transfer of title and risk of ownership has occurred. Although we do not recognize revenue from sales to our distributors upon shipment, the title and the risk of ownership for the products transfer to the distributor upon shipment as the shipping terms are typically ex works (EXW) or free on board (FOB) shipping point and the distributor is obligated to pay for the products at that time. We do not offer distributors, CMs or OEMs return rights, rebates, price protection or other similar rights. However, in the past, we have occasionally accepted returns from distributors. As a result, we defer revenue recognition, adjustments to revenue and the related costs of revenue until the distributor notifies us in writing of their resale of the products. The amounts billed to distributors, adjustments to revenue and the cost of inventory shipped to, but not yet sold by the distributors, are included on our consolidated balance sheets under “Deferred credits and income.” We take into account the inventories held by our distributors in determining the appropriate level of provision for excess and obsolete inventory. With respect to a single OEM, we earn royalties on mobile phones integrating our licensed processor IP. We recognize royalty revenue based on mobile phone shipments reported by this OEM during the quarter in which we receive the report, assuming that all other revenue recognition criteria are met at that time because we do not have other evidence to reasonably estimate the amount of royalties due. The amount of revenue recognized is determined by multiplying the number of mobile phones sold during a particular quarter in which our processor IP is integrated at the agreed-upon royalty rate. Litigation, investigation and settlement costs From time to time, we are involved in legal actions and/or investigations by regulatory bodies. There are many uncertainties associated with any litigation, and we cannot be certain that these actions or other third party claims against us will be resolved without costly investigation, defense, substantial settlement payments and/or judgments. If any of these were to occur, our business, financial condition and results of operations could be materially and adversely affected. If information becomes available that causes us to determine that a loss in any of our pending litigation is probable, and we can reasonably estimate the loss associated with such events, we record the loss in accordance with U.S. GAAP. However, the actual liability in any such litigation or investigations may be materially different from our estimates, which could require us to record additional cost. Recent accounting pronouncements In May 2011, the FASB amended its guidance related to fair value measurements to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. The amendments change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the updated guidance should not result in a change in the application of previous fair value measurement guidance. We adopted this guidance prospectively beginning in the three months ended March 31, 2012. The adoption of this guidance did not have a material impact on our financial position, results of operations or our cash flows. In June 2011, the FASB issued guidance related to the presentation of comprehensive income. This update gives an entity the option to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. We adopted this guidance retrospectively effective in the three months ended March 31, 2012. Other than requiring additional disclosures, the adoption of this guidance did not have a material impact on our financial position, results of operations or cash flows. In December 2011, the FASB issued additional guidance related to the presentation of other comprehensive income. This guidance is intended to allow the FASB time to re-deliberate whether it is necessary to require entities to present the effects of reclassifications out of accumulated other comprehensive income in both the statement in which net income is presented and the statement in which other comprehensive income is presented. This guidance defers the effective date of only those provisions in the other comprehensive income guidance that relate to the presentation of reclassification adjustments out of other comprehensive income and reinstates the previous requirements to present reclassification adjustments either on the face of the statement in which other comprehensive income is reported or to disclose them in a note to the financial statements. The amendments in this new guidance became effective at the same time as the amendments in the other comprehensive income guidance explained above. Our adoption of this standard did not have a material impact on our financial position, results of operations or cash flows. In December 2011, the FASB issued guidance on “Disclosures about Offsetting Assets and Liabilities” which requires an entity to disclose information about offsetting and related arrangements to ensure that the users of the financial statements of the entity can understand the effect that offsetting has on the financial position of the entity. This guidance is effective for annual periods beginning on or after January 1, 2013. Retrospective application is required for all comparative periods presented. The adoption of this guidance is not expected to have a material impact on our consolidated financial statements.

3. Consolidated balance sheet components Inventories Inventories as of September 30, 2012 and December 31, 2011 consisted of the following:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Work in progress </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,772</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">8,684</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Finished goods </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7,766</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">11,558</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total inventory </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11,538</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">20,242</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   Property and equipment Property and equipment, net as of September 30, 2012 and December 31, 2011 consisted of the following:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Computers and equipment </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,337</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,640</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Machinery and equipment </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,012</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,414</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Software </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">727</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">581</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Furniture and fixtures </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">442</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">401</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Leasehold improvements </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,120</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">431</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Construction in progress </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,139</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Gross property and equipment </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8,777</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,467</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Accumulated depreciation and amortization </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3,268</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2,230</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Property and equipment, net </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5,509</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,237</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> On June 5, 2012, we entered into a lease agreement for our future headquarters, which will consist of 87,565 rentable square feet in Mountain View, California. The facility is in the process of being constructed. Pursuant to the lease agreement, we agreed to pay construction cost in excess of a certain amount and we have certain indemnification obligations related to the construction. As a result of our involvement during construction period, we are considered to be the owner of the construction project during the construction period in accordance with accounting for the effect of lessee involvement in asset construction. As of September 30, 2012, we capitalized $1.1 million of assets as construction in progress, based on the construction costs incurred by the landlord. Upon execution of the lease agreement, we reimbursed the landlord $0.5 million for the construction cost in the form of a security deposit, and as a result, our corresponding liability of $0.6 million was reflected as a financing obligation for construction in progress. Depreciation and amortization expense for the three and nine months ended September 30, 2012 was $423,000 and $1.1 million, respectively. Depreciation and amortization expense for the three and nine months ended September 30, 2011 was $226,000 and $586,000, respectively. Accrued and other current liabilities Accrued and other current liabilities as of September 30, 2012 and December 31, 2011 consisted of the following:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Compensation </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4,064</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,171</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Professional fees </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">959</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">909</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Royalties </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">352</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">490</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Tenant improvements </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">63</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Accrued engineering costs </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">240</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">496</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Other </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,781</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">276</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Accrued and other current liabilities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">7,435</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4,405</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

4. Marketable securities We invest our excess cash primarily in U.S. government agency and treasury notes, money market funds and municipal notes and bonds that mature within one year.   All cash equivalents and marketable securities are classified as available-for-sale and are summarized as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="68%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Fair value</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Amortized cost</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Gross unrealized gains</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Gross unrealized losses</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Money market funds </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> U.S. government bonds and notes </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,051</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79,969</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Cash </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39,817</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39,817</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash, cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">119,787</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">119,786</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> Available-for-sale securities are reported at fair value on the condensed consolidated balance sheet and classified as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="81%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Cash equivalents </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Short term marketable securities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Cash </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39,817</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,921</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash, cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">119,787</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">15,983</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> We invest in high quality, highly liquid debt securities that mature within one year. We hold all of our marketable securities as available-for-sale and mark them to market. We currently do not intend to sell these investments nor are we required to sell these investments. As of September 30, 2012, marketable debt securities with a fair value of $80.0 million, which mature within one year had insignificant unrealized losses. However, we cannot provide any assurance that our portfolio of cash, cash equivalents and marketable securities will not be impacted by adverse conditions in the financial markets, which may require us in the future to record an impairment charge for credit losses which could adversely impact our financial results. The estimated fair value of cash equivalents and marketable securities as of September 30, 2012 was $80 million. The unrealized gains, net, were insignificant in relation to our total available-for-sale portfolio. The unrealized gains, net, were primarily due to market conditions and the demand for and duration of our U.S. government bonds and notes.

5. Fair value hierarchy Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Fair value hierarchy is based on three levels of inputs that may be used to measure fair value, of which the first two are considered observable and the last unobservable:   <table cellspacing="0" cellpadding="0" width="92%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr> <td width="7%"> </td> <td valign="bottom" width="1%"> </td> <td width="92%"> </td> </tr>   <tr> <td valign="top" nowrap="nowrap"> Level 1 — </td> <td valign="bottom"> </td> <td valign="top">Quoted prices in active markets for identical assets or liabilities.</td> </tr> <tr> <td height="8"> </td> <td height="8" colspan="2"> </td> </tr> <tr> <td valign="top" nowrap="nowrap"> Level 2 — </td> <td valign="bottom"> </td> <td valign="top">Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.</td> </tr> <tr> <td height="8"> </td> <td height="8" colspan="2"> </td> </tr> <tr> <td valign="top" nowrap="nowrap"> Level 3 — </td> <td valign="bottom"> </td> <td valign="top">Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.</td> </tr>  </table>   Financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2012 were as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="78%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Total</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 1</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 2</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 3</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Assets </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Money market funds(1) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> U.S. government bonds and notes(2) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Total available-for-sale debt securities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(1)</td> <td align="left" valign="top">Money market funds are included in cash and cash equivalents on the condensed consolidated balance sheet. </td> </tr> </table> <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(2)</td> <td align="left" valign="top">U.S. government bonds and notes are included in marketable securities on the condensed consolidated balance sheet . </td> </tr> </table> Financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2011 were as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="78%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Total</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 1</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 2</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 3</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Assets </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Money market funds(1) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Liabilities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Convertible preferred stock warrants(2) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(1,137</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(1,137</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(1)</td> <td align="left" valign="top">Money market funds are included in cash and cash equivalents on the condensed consolidated balance sheet. </td> </tr> </table> <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(2)</td> <td align="left" valign="top">The convertible preferred stock warrants were subject to revaluation at each balance sheet date and any change in fair value was recognized as a component of other income (expense), net in the consolidated statements of comprehensive income. These warrants were revalued up to the date the convertible preferred stock warrants were exercised or became warrants to purchase common stock upon the closing of our IPO, and the liability related to these warrants were reclassified as stockholders’ equity (deficit). </td> </tr> </table> Prior to the closing of our IPO, the warrants to purchase 110,269 shares of our convertible preferred stock were exercised. As a result we reclassified the aggregate fair value of $1.4 million from the liability to stockholders’ equity (deficit). The remaining warrants to purchase 1,333 shares of our convertible preferred stock converted to warrants to purchase our common stock upon the close of our IPO on May 15, 2012. As a result we reclassified the aggregate fair market value of $23,000 from the liability to stockholders’ equity (deficit), and no longer revalue the warrants. The warrants to purchase 1,333 shares of our common stock were unexercised as of September 30, 2012. Prior to the closing of our IPO, we used the Black-Scholes option pricing model to determine the fair value of the warrants to purchase convertible preferred stock, including the consideration of underlying ordinary share price, using the following assumptions: the risk-free interest of 0.18% - 1.61%, the expected term of 1.28 - 7.17 years and the expected volatility of 32.6% - 37.5%. Certain inputs used in the model are unobservable. As a result, the valuation of the warrants is categorized as Level 3 in accordance with ASC 820, Fair Value Measurement. The fair values could change significantly based on future market conditions. The following table sets forth reconciliations for our convertible preferred stock warrants:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Beginning balance </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,137</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">315</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Change in fair value of preferred stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">290</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">822</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Exercise of preferred stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(1,404</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Conversion of preferred stock warrants to common stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(23</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Ending balance </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,137</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

6. Income taxes For all periods presented through December 31, 2011, our income (loss) before provision for income taxes was U.S. based; our income tax provision was insignificant and was reflected in other income (expense), net in the accompanying statement of operations. Effective January 1, 2012, our new international structure became operational. Our effective tax rate in the periods presented on or after January 1, 2012 is the result of the mix of income earned in various tax jurisdictions that apply a broad range of income tax ranges. The rate at which the provision for income taxes is calculated also differs from the U.S. federal statutory income tax rate primarily due to the full valuation allowance on U.S. deferred tax assets and different tax rates in foreign jurisdictions where income is earned and considered to be indefinitely reinvested. Our effective income tax rate was 3% for both the three and nine months ended September 30, 2012. We had zero effective income tax rates for both the three and nine months ended September 30, 2011. Our provision for income taxes was $167,000 and $432,000 for the three and nine months ended September 30, 2012, respectively, which was primarily related to income tax in foreign jurisdictions. Our provision for income taxes was immaterial for both the three and nine months ended September 30, 2011. As of September 30, 2012, we had gross unrecognized tax benefits totaling $3.4 million, all of which were offset by a full valuation allowance. Approximately $2.5 million of our net unrecognized tax benefits, not including interest, if recognized, would affect our effective tax rate. One or more of these net unrecognized tax benefits could be subject to valuation allowance if and when recognized in a future period, which could impact the timing of any related effective tax rate benefit. We recognize interest and/or penalties related to income tax matters within the provision for income taxes. We had no accrued interest or penalties due to our net operating losses and tax credits available to offset any tax adjustments. We do not believe that it is reasonably possible that our unrecognized tax benefits would materially change in the next 12 months. We are subject to examination by U.S. federal and state tax authorities for all years since our inception in 2000 and are subject to examination by foreign tax authorities since the formation of our non-U.S. entities. We currently have no income tax examinations in progress nor have we had any income tax examinations since our inception. We regularly assess the realizability of deferred tax assets based upon the weight of all available evidence, including such factors as the historical tax losses, recent earnings history and expected future taxable income, the amount and timing of which are uncertain. We believe that it is more likely than not that we will be unable to realize all of our deferred tax assets and, accordingly, full valuation allowance of $16.6 million was established for such amounts as of December 31, 2011. However, should there be a change in our ability to realize our deferred tax assets, the valuation allowance will be released, resulting in a decrease to the income tax provision in the period in which we determine that it is more likely than not that the benefit of our deferred tax assets will be realized. With our recent earnings and projected future income, we believe that it is reasonably possible that we may release a significant portion of the valuation allowance against our U.S. deferred income tax assets in the next 12 months.

7. Earnings per share Basic net income per share allocable to holders of common stock is computed by dividing the net income allocable to common stockholders for the period by the weighted average number of shares of common stock outstanding during the period. Net income allocable to holders of common stock is calculated using the two-class method, as we have issued securities other than common stock that contractually entitle the holder to participate in dividends and earnings. Holders of our convertible preferred stock were each entitled to receive non-cumulative dividends at the annual rates payable prior and in preference to any dividends on any shares of our common stock. After payment of these preferred stock dividends, any additional dividends were required to be distributed among the holders of convertible preferred stock and common stock pro rata (on an as-converted basis). The holders of the convertible preferred stock did not have a contractual obligation to share in our losses. We considered our convertible preferred stock to be participating securities. The two-class method requires earnings for the period, after deduction of preferred stock dividends, to be allocated between the holders of common and preferred stock based on their respective rights to receive dividends. Basic net income per share is then calculated by dividing net income allocable to holders of common stock (after the reduction for any undeclared preferred stock dividends assuming the distribution of current income for the period) by the weighted average number of shares of common stock outstanding. In computing diluted net income allocable to holders of common stock, undistributed earnings are reallocated to reflect the potential impact of dilutive securities. Diluted net income per share allocable to holders of common stock is computed by dividing the net income allocable to holders of common stock for the period by the weighted average number of common and potential common shares outstanding during the period, if the effect of each class of potential shares of common stock is dilutive. Potential shares of common stock include incremental shares of common stock issuable upon the exercise of stock options, conversion of preferred stock and exercise of warrants.   The following table sets forth the computation of basic and diluted net income per share under the two-class method attributable to common stockholders:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands, except per share amounts)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Numerator: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Net income </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,664</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,401</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">12,158</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">13,934</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Non-cumulative dividends to holders of preferred stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(1,498</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2,248</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(4,495</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr> <td valign="top"> Undistributed earnings allocable to holders of preferred stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(840</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3,709</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(8,821</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Net income—basic </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,664</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">63</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6,201</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">618</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Adjustment for undistributed earnings reallocated to holders of common stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">145</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">521</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,221</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Net income—diluted </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,664</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">208</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6,722</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,839</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Denominator: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Weighted average shares used in computing net income per share: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Basic </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20,342</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">982</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">10,956</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">925</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Weighted average effect of potentially dilutive securities: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Options to purchase common stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,699</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,820</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,789</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,271</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Employee stock purchase plan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">117</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">70</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Common stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Convertible preferred stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Diluted </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">23,159</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,802</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,816</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,196</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Net income per share: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Basic </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.06</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.57</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.67</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Diluted </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.16</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.05</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.49</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.58</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> The following potentially dilutive shares of common stock were excluded from the computation of diluted net income per share of common stock for the periods presented because including them would have had an antidilutive effect:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months  ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Options to purchase common stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">923</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">345</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Convertible preferred stock (if-converted basis) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6,506</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Restricted stock units </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Total </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">941</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6,869</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

8. Commitments and contingencies Leases We lease office space under noncancelable agreements with various expiration dates through May 30, 2023. Rent expense was $693,000 and $1.7 million for the three and nine months ended September 30, 2012, respectively. Rent expense was $309,000 and $916,000 for the three and nine months ended September 30, 2011, respectively. On June 5, 2012, we entered into a lease agreement for our future headquarters, which will consist of 87,565 square feet in Mountain View, California. The facility is in the process of being constructed. The contractual lease commencement date is the earlier of (i) the date upon which we first commence to conduct business in the premises, and (ii) the later to occur of (a) the date upon which the premises are ready for occupancy or (b) June 1, 2013. The contractual annual base payment is $3.7 million subject to a full abatement of payment for the first month of the lease term. The annual base payment increases 3% each year. The lease term is 10 years with one option to extend the lease term for an additional period of five years.   Pursuant to the lease agreement, we agreed to pay construction cost in excess of a certain amount and we have certain indemnification obligations related to the construction. As a result of our involvement during the construction period, we are considered to be the owner of the construction project during the construction period in accordance with accounting for the effect of lessee involvement in asset construction. As of September 30, 2012, we capitalized $1.1 million of assets as construction in progress, based on the construction costs incurred by the landlord. Upon execution of the lease agreement, we reimbursed the landlord $0.5 million for the construction cost in the form of a security deposit, and as a result, our corresponding liability of $0.6 million was reflected as a financing obligation for construction in progress. Future minimum lease payments under noncancelable leases as of September 30, 2012 were as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="90%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td colspan="2" valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Year ending December 31, </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> 2012 (remaining three months) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">699</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> 2013 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,457</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> 2014 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,446</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> 2015 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,184</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> 2016 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,314</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> 2017 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,265</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> 2018 and beyond </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">24,360</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total minimum lease payments </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">46,725</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> Litigation On May 1, 2012, Dmitry Edward Terez filed a patent infringement lawsuit in U.S. District Court for the District of Delaware against us. The complaint alleged that our products infringe U.S. Patent No. 7,124,075 held by Mr. Terez. The complaint sought unspecified monetary damages, costs and expenses and injunctive relief against us. On August 23, 2012, Mr. Terez dismissed his complaint without prejudice. On July 3, 2012, Noise Free Wireless, Inc. filed a lawsuit in U.S. District Court for the Northern District of California against one of our OEMs and against us. The complaint alleged that our products infringe U.S. Patent No. 7,742,790 held by Noise Free Wireless and that our OEM infringed the same patent based on its alleged use of our products. The complaint also alleged that we misappropriated Noise Free Wireless’ trade secrets and engaged in unfair business practices based on the alleged patent infringement and trade secret misappropriation. The complaint made additional allegations against our OEM. The complaint sought unspecified monetary damages, costs and fees and injunctive relief against us. On September 14, 2012, the parties stipulated to dismiss Noise Free Wireless’ complaint without prejudice. On September 18, 2012, the Court entered an order approving this stipulation, thereby dismissing Noise Free Wireless’ complaint without prejudice. On September 13, 2012, a purported shareholder filed a class action complaint in the Superior Court of the State of California for Santa Clara County against us, the members of our board of directors, two of our executive officers and the underwriters of our IPO. The complaint purports to be brought on behalf of a class of purchasers of our common stock issued in or traceable to the IPO and contains claims under Sections 11, 12(a)(2) and 15 of the Securities Act. The complaint seeks, among other things, compensatory damages, rescission and attorney’s fees and costs. Pursuant to a scheduling order set by the Court, we anticipate filing a response to the complaint in February 2013. We believe that the allegations in the complaint are without merit and intend to vigorously contest the action. However, there can be no assurance that we will be successful in our defense and we cannot currently estimate a range of any possible losses we may experience in connection with this case. Accordingly, we are unable at this time to estimate the effects of this complaint on our financial condition, results of operations or cash flows. Purchase commitments We subcontract with other companies to manufacture our voice and audio processors. We may cancel these purchase commitments at any time, however we are required to pay all costs incurred through the cancellation date. We rarely cancel these agreements once production has started. As of September 30, 2012 and December 31, 2011, we had purchase commitments with our third-party foundries and other suppliers of $10.3 million and $11.8 million due within one year, respectively, and $0 due after one year for both periods.

9. Capital Stock Common stock As of September 30, 2012 and December 31, 2011, 500,000,000 and 600,000,000 shares of common stock, respectively, were authorized under our certificate of incorporation. As of September 30, 2012 and December 31, 2011, we had reserved shares of common stock for future issuance as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="81%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Shares reserved for convertible preferred stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205,180</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares reserved for stock options and restricted stock units </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7,478,166</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5,849,131</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Shares reserved for employee stock purchase plan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">451,764</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares reserved for warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,333</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">111,602</td> <td nowrap="nowrap" valign="bottom"> </td> </tr>  </table>   10. Convertible preferred stock In connection with the completion of our IPO on May 15, 2012, all of our previously outstanding shares of convertible preferred stock of 13,205,180 were converted into common stock. Warrants Pursuant to convertible notes we issued in August 2003, we issued warrants to purchase 110,269 shares of Series AA convertible preferred stock at an exercise price of $3.627 per share. In connection with our July 2009 line of credit agreement with Silicon Valley Bank, we also issued warrants to purchase 1,333 shares of Series D convertible preferred stock at $5.133 per share, which subsequently converted into the right to purchase 1,333 shares of Series E convertible preferred stock at a per share exercise price of $3.67. At December 31, 2011, we recorded the fair value of preferred stock warrants of $1.1 million as long-term liabilities. The freestanding warrants were subject to remeasurement at each balance sheet date with any change in fair value recognized as a component of “Other income (expense), net” in our consolidated statements of comprehensive income. Prior to the closing of our IPO, the warrants to purchase 110,269 shares of our convertible preferred stock were exercised, and as a result, we reclassified the aggregate fair value of $1.4 million from the liability to stockholders’ equity (deficit) in our condensed consolidated balance sheet. The warrants to purchase 1,333 shares held by Silicon Valley Bank were converted to warrants to purchase our common stock upon the close of our IPO on May 15, 2012, and as a result, we reclassified the aggregate fair market value of $23,000 from the liability to stockholders’ equity (deficit). The warrants to purchase 1,333 shares were unexercised as of September 30, 2012. The convertible preferred stock warrants were revalued up to the date the convertible preferred stock warrants were exercised or became warrants to purchase common stock upon the closing of our IPO, and the liability related to these warrants were reclassified as stockholders’ equity (deficit). For the three and nine months ended September 30, 2012, we recorded expense of $0 and $290,000, respectively, for the change in fair value of these warrants. For the three and nine months ended September 30, 2011, we recorded income of $102,000 and expense of $556,000, respectively, for the change in fair value of these warrants.

11. Stock-based compensation and awards 2001 Plan. In 2001, our board of directors and stockholders approved the 2001 Stock Plan (2001 Plan) pursuant to which our board of directors was authorized to issue stock purchase rights, incentive stock options and nonqualified stock options. We ceased granting options under the 2001 Plan in March 2011 upon the adoption of our 2011 Equity Incentive Plan (2011 Plan). 2011 Plan: In March 2011 and June 2011, our board of directors and our stockholders, respectively, approved the 2011 Plan, under which our board of directors may issue stock appreciation rights, restricted stock, restricted stock units, incentive stock options and nonqualified stock options to service providers. In June 2012, we began issuing restricted stock units as an element of our compensation plans in addition to incentive stock options and nonqualified stock options. 2011 ESPP: In September 2011 and April 2012, our board of directors and our stockholders, respectively, approved our 2011 Employee Stock Purchase Plan (2011 ESPP), which plan became effective upon the completion of our IPO. The 2011 ESPP permits eligible participants to purchase common stock at a discount through contributions of up to 15% of their eligible compensation, subject to any plan limitations. The 2011 ESPP provides for offering and purchase periods of approximately six months in duration, except for our first offering period which commenced on the completion of our IPO and ends on first trading day on or after November 16, 2012. The purchase price of shares is 85% of the lower of the fair market value of our common stock on the first trading day of each offering period or on the exercise date.   The following is a summary of option activity under the 2001 Plan and 2011 Plan for the nine months ended September 30, 2012:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td colspan="2" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Options outstanding</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Shares available for grant</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number of shares</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Balances at December 31, 2011 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,343,978</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,505,153</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.25</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Options granted </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(790,364</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">790,364</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">15.11</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Options exercised </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(216,035</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2.36</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Options cancelled </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">197,371</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(197,371</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.28</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Options retired—2001 Plan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(120,874</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Balances at September 30, 2012 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">630,111</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,882,111</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5.98</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr>  </table> The following is a summary of restricted stock unit activity for the nine months ended September 30, 2012:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="83%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Shares outstanding</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number of shares</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Balances at December 31, 2011 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares granted </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">17,500</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21.88</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Shared vested and paid out </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares forfeited </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Balances at September 30, 2012 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">17,500</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">21.88</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr>  </table> At September 30, 2012, we had 2,238,164 options expected to vest at a weighted average exercise price of $9.14 per share. At December 31, 2011, we had 2,303,799 options expected to vest at a weighted average exercise price of $6.08 per share. We calculated the intrinsic value of options outstanding, exercisable and expected-to-vest options based on the difference between the exercise price and the fair market value of our common stock on the applicable reporting date. The intrinsic value of exercised options was calculated based on the difference between the exercise price and the fair market value of our common stock as of the exercise date. From our inception until March 31, 2012, we generally obtained contemporaneous valuation analyses prepared by an unrelated third party valuation firm in order to assist us in determining the fair market value of our common stock. Our most recent contemporaneous valuation report was as of March 15, 2012. Prior to the completion of our IPO, our board of directors considered these reports when determining the fair market value of our common stock and related exercise prices of option awards on the date such awards were granted. We have also used these contemporaneous third party valuations for purposes of determining the Black-Scholes fair value of our stock option awards and related stock-based compensation expense.   Information regarding our options as of September 30, 2012 and December 31, 2011 is summarized below:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="41%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom" colspan="16" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000"> Options outstanding at September 30, 2012 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000">Options exercisable at September 30, 2012</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom" nowrap="nowrap"> Range of exercise price </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number outstanding</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number exercisable</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> $ 0.60 - $ 0.90 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">711,648</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3.5</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">711,648</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3.5</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $ 2.40 - $ 3.00 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,054,633</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.57</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,356,049</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.52</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> $ 3.30 - $ 5.10 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">497,361</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8.3</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.27</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">189,148</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8.3</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.28</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $ 7.17 - $13.80 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,290,813</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.65</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">173,539</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.65</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> $15.30 - $21.88 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">327,656</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.7</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19.04</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,514</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.6</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">16.55</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,882,111</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.5</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5.98</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">12,323</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,432,898</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.79</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">9,257</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="40%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom" colspan="16" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000"> Options outstanding at December 31, 2011 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000">Options exercisable at December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom" nowrap="nowrap"> Range of exercise price </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number outstanding</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number exercisable</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> $0.60 - $ 0.90 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">755,519</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">753,126</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $2.40 - $ 3.00 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,285,729</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.54</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,107,324</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.7</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.48</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> $3.30 - $ 5.10 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">556,829</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.24</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">87,068</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3.69</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $9.30 - $11.70 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">907,076</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.8</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.53</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">198,228</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.8</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.67</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,505,153</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.8</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.25</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">43,005</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,145,746</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.7</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.76</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">23,689</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> Options to nonemployees. As of September 30, 2012, we had granted options to purchase 8,866 shares of common stock to nonemployees, which options had a weighted average exercise price of $2.04 per share. These options were valued on the date of grant using the Black-Scholes option pricing model with the following assumptions: volatility between 43% and 60%, risk-free interest rates between 2.07% and 5.13%, zero percent expected dividend yield and the contractual life of 10 years. At each reporting date, we revalue any unvested options using the Black-Scholes option pricing model. As a result, the stock-based compensation expense will fluctuate as the fair market value of our common stock fluctuates. Changes in the estimated fair value of these options will be recognized as stock-based compensation in the period of the change. Stock-based compensation expense. The following table summarizes the components of stock-based compensation expense for the three and nine months ended September 30, 2012 and 2011. We realized no tax benefits as we are using the net operating loss to reduce our current income tax liability and did not capitalize any amounts as part of inventory as such amounts were insignificant.   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months  ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Cost of revenue </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">50</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">104</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">66</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Research and development </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">346</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">117</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">695</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">285</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Selling, general and administrative </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">666</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">248</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,391</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">433</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,062</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">383</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,190</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">784</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> Valuation assumptions. We estimate the fair value of each stock-based award on the date of grant using the Black-Scholes option pricing model. Expected volatility is based on the historical volatility of a selected guideline group of publicly traded companies. The expected term of stock-based awards is based upon the simplified method for estimating expected term. The risk-free rate for the expected term of the stock-based awards is based on the U.S. Treasury Constant Maturity rate.   The assumptions used to value stock option awards granted during the three and nine months ended September 30, 2012 and 2011 were as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Expected term (years) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Volatility </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">39</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Risk-free rate </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">0.79-1.03</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">0.79-1.26</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">2.30-2.79</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr> <td valign="top"> Dividend yield </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> </tr>  </table> The assumptions used to value shares issued under our 2011 ESPP during the three and nine months ended September 30, 2012 were as follows:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="12%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="12%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Three months ended September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30, 2012</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Expected term (years) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">0.50</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Volatility </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">30.8</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Risk-free rate </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">0.15</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr> <td valign="top"> Dividend yield </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> </tr>  </table> At September 30, 2012 and December 31, 2011, we had $8.5 million and $5.2 million, respectively, of total unrecognized compensation expense, net of estimated forfeitures, related to stock-based awards that we expect to recognize over a weighted average period of 2.2 years and 2.5 years, respectively.

12. Borrowings Line of credit In July 2009, we entered into a $5.0 million revolving line of credit agreement with Silicon Valley Bank, under which available funds are based on eligible accounts receivable. On July 6, 2011, we amended our line of credit agreement with Silicon Valley Bank. Among other changes, the amendment (i) increased our line of credit from $5.0 million to $10.0 million and extends the availability of the line until July 6, 2013; (ii) provided that we may borrow up to $2.0 million (of the $10.0 million total) without reference to the value of our accounts receivable or purchase orders; (iii) changed the applicable interest rate on the line of credit to the following: (a) for prime rate loans, a range from the bank’s prime rate to the prime rate plus 0.35% per annum (the higher rate is applicable if our quick ratio falls below 1.25:1.00), or (b) for LIBOR loans, LIBOR plus 1.75% per annum; and (iv) replaced the credit facility’s financial tests based on net cash balances with a condition that we maintain a quick ratio of at least 1.25:1.00 (used to determine borrowing eligibility and interest rate). The amendment also removed a covenant that we maintain a quick ratio of 1.50:1.00 while equipment loans remain outstanding. As of September 30, 2012 and December 31, 2011, we had no outstanding borrowings under our line of credit agreement. Equipment loan In July 2009, we entered into a $500,000 equipment term loan payable in 36 equal monthly installments of principal plus accrued interest. As of December 31, 2011, the outstanding balance was $103,000. In June 2012, we repaid the outstanding balance of this loan.

13. Segment and geographic information We operate in one reportable segment related to the selling and marketing of voice and audio processors and licensing of processor IP for use in mobile devices. We have identified our president and chief executive officer as the Chief Operating Decision Maker (CODM), who manages our operations as a whole. For the purpose of evaluating financial performance and allocating resources, the CODM reviews financial information accompanied by information by customer and by product. Substantially all of our revenue was generated from the sale of our products to CMs and OEMs whose primary manufacturing operations and distributions are in Asia. Since our OEMs market and sell their products worldwide, our revenue by geographic location is not necessarily indicative of the geographic distribution of mobile device sales, but rather of where the mobile devices are manufactured. Our revenue is therefore based on the country or region in which our OEMs or their CMs issue their purchase orders to us.   Apple, one of our large OEMs, transitioned the majority of its business from the purchase of our processors to licensing of our processor IP, which is generated in the jurisdiction where this OEM has its headquarters in the United States. We began to recognize royalty revenue in 2012, which accounted for 21% and 31% of our total revenue for the three and nine months ended September 30, 2012, respectively. Revenue percentages for the geographic regions reported below were based upon customer headquarters’ locations. The following is a summary of the geographic information related to revenue for the periods presented:   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="76%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months  ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> China </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">61</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr> <td valign="top"> Japan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Korea </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">57</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">47</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> United States </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">31</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Other </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Total </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table> As of September 30, 2012 and December 31, 2011, substantially all of our long-lived tangible assets were located in the United States.

Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an on-going basis, we evaluate our estimates, including those related to allowances for doubtful accounts receivable and sales returns, inventory write downs, useful lives of long-lived assets, valuation of deferred tax assets and uncertain tax positions, the measurement of stock-based compensation, the valuation of our various equity instruments, litigation investigation and settlement costs and other contingencies. We base our estimates and judgments on our historical experience, knowledge of current conditions and beliefs of what could occur in the future, considering available information. Actual results could differ from those estimates.

Revenue recognition We derive revenue from the direct sale of voice and audio processors to CMs and OEMs and indirect sales of processors to OEMs through distributors. We recognize revenue from sales to CMs and OEMs when persuasive evidence of an arrangement exists, the selling price is fixed or determinable, product delivery has occurred, which is when the risk and reward of ownership pass to the customer, and collectability of the resulting receivable is reasonably assured. These criteria are usually met when our processors are shipped to an OEM under INCOTERMS 2000 commercial terms, which are typically free carrier (FCA), delivered at terminal (DAT) and delivered at place (DAP) shipping point. We also ship a significant portion of our products to the inventory hubs of CMs and recognize the related revenue as the CMs notify us in writing that they have drawn our products from the hub, at which point delivery and transfer of title and risk of ownership has occurred. Although we do not recognize revenue from sales to our distributors upon shipment, the title and the risk of ownership for the products transfer to the distributor upon shipment as the shipping terms are typically ex works (EXW) or free on board (FOB) shipping point and the distributor is obligated to pay for the products at that time. We do not offer distributors, CMs or OEMs return rights, rebates, price protection or other similar rights. However, in the past, we have occasionally accepted returns from distributors. As a result, we defer revenue recognition, adjustments to revenue and the related costs of revenue until the distributor notifies us in writing of their resale of the products. The amounts billed to distributors, adjustments to revenue and the cost of inventory shipped to, but not yet sold by the distributors, are included on our consolidated balance sheets under “Deferred credits and income.” We take into account the inventories held by our distributors in determining the appropriate level of provision for excess and obsolete inventory. With respect to a single OEM, we earn royalties on mobile phones integrating our licensed processor IP. We recognize royalty revenue based on mobile phone shipments reported by this OEM during the quarter in which we receive the report, assuming that all other revenue recognition criteria are met at that time because we do not have other evidence to reasonably estimate the amount of royalties due. The amount of revenue recognized is determined by multiplying the number of mobile phones sold during a particular quarter in which our processor IP is integrated at the agreed-upon royalty rate.

Recent accounting pronouncements In May 2011, the FASB amended its guidance related to fair value measurements to provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. The amendments change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. For many of the requirements, the updated guidance should not result in a change in the application of previous fair value measurement guidance. We adopted this guidance prospectively beginning in the three months ended March 31, 2012. The adoption of this guidance did not have a material impact on our financial position, results of operations or our cash flows. In June 2011, the FASB issued guidance related to the presentation of comprehensive income. This update gives an entity the option to present the total of comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. We adopted this guidance retrospectively effective in the three months ended March 31, 2012. Other than requiring additional disclosures, the adoption of this guidance did not have a material impact on our financial position, results of operations or cash flows. In December 2011, the FASB issued additional guidance related to the presentation of other comprehensive income. This guidance is intended to allow the FASB time to re-deliberate whether it is necessary to require entities to present the effects of reclassifications out of accumulated other comprehensive income in both the statement in which net income is presented and the statement in which other comprehensive income is presented. This guidance defers the effective date of only those provisions in the other comprehensive income guidance that relate to the presentation of reclassification adjustments out of other comprehensive income and reinstates the previous requirements to present reclassification adjustments either on the face of the statement in which other comprehensive income is reported or to disclose them in a note to the financial statements. The amendments in this new guidance became effective at the same time as the amendments in the other comprehensive income guidance explained above. Our adoption of this standard did not have a material impact on our financial position, results of operations or cash flows. In December 2011, the FASB issued guidance on “Disclosures about Offsetting Assets and Liabilities” which requires an entity to disclose information about offsetting and related arrangements to ensure that the users of the financial statements of the entity can understand the effect that offsetting has on the financial position of the entity. This guidance is effective for annual periods beginning on or after January 1, 2013. Retrospective application is required for all comparative periods presented. The adoption of this guidance is not expected to have a material impact on our consolidated financial statements.

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Work in progress </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,772</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">8,684</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Finished goods </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7,766</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">11,558</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total inventory </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11,538</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">20,242</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Computers and equipment </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,337</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,640</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Machinery and equipment </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,012</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,414</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Software </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">727</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">581</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Furniture and fixtures </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">442</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">401</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Leasehold improvements </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,120</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">431</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Construction in progress </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,139</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Gross property and equipment </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8,777</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,467</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Accumulated depreciation and amortization </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3,268</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2,230</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Property and equipment, net </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5,509</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,237</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Compensation </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4,064</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,171</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Professional fees </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">959</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">909</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Royalties </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">352</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">490</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Tenant improvements </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">63</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Accrued engineering costs </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">240</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">496</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Other </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,781</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">276</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Accrued and other current liabilities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">7,435</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4,405</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="68%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Fair value</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Amortized cost</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Gross unrealized gains</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Gross unrealized losses</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Money market funds </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> U.S. government bonds and notes </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,051</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79,969</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Cash </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39,817</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39,817</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash, cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">119,787</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">119,786</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="81%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Cash equivalents </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Short term marketable securities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Cash </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">39,817</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,921</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total cash, cash equivalents and marketable securities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">119,787</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">15,983</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="78%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Total</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 1</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 2</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 3</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Assets </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Money market funds(1) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">57,918</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> U.S. government bonds and notes(2) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">22,052</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Total available-for-sale debt securities </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">79,970</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(1)</td> <td align="left" valign="top">Money market funds are included in cash and cash equivalents on the condensed consolidated balance sheet. </td> </tr> </table> <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(2)</td> <td align="left" valign="top">U.S. government bonds and notes are included in marketable securities on the condensed consolidated balance sheet </td> </tr> </table>   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="78%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Total</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 1</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 2</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Level 3</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Assets </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Money market funds(1) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,062</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Liabilities </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Convertible preferred stock warrants(2) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(1,137</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">(1,137</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(1)</td> <td align="left" valign="top">Money market funds are included in cash and cash equivalents on the condensed consolidated balance sheet. </td> </tr> </table> <table style="border-collapse:collapse; text-align: left" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%" valign="top" align="left">(2)</td> <td align="left" valign="top">The convertible preferred stock warrants were subject to revaluation at each balance sheet date and any change in fair value was recognized as a component of other income (expense), net in the consolidated statements of comprehensive income. These warrants were revalued up to the date the convertible preferred stock warrants were exercised or became warrants to purchase common stock upon the closing of our IPO, and the liability related to these warrants were reclassified as stockholders’ equity (deficit). </td> </tr> </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="6%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Beginning balance </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,137</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">315</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Change in fair value of preferred stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">290</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">822</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Exercise of preferred stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(1,404</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Conversion of preferred stock warrants to common stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(23</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Ending balance </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,137</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands, except per share amounts)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Numerator: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Net income </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,664</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,401</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">12,158</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">13,934</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Non-cumulative dividends to holders of preferred stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(1,498</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(2,248</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(4,495</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr> <td valign="top"> Undistributed earnings allocable to holders of preferred stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(840</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(3,709</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(8,821</td> <td nowrap="nowrap" valign="bottom">) </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Net income—basic </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,664</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">63</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6,201</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">618</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Adjustment for undistributed earnings reallocated to holders of common stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">145</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">521</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,221</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Net income—diluted </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3,664</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">208</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">6,722</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,839</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Denominator: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Weighted average shares used in computing net income per share: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Basic </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20,342</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">982</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">10,956</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">925</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Weighted average effect of potentially dilutive securities: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Options to purchase common stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,699</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,820</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,789</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,271</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Employee stock purchase plan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">117</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">70</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Common stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Convertible preferred stock warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Diluted </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">23,159</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,802</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,816</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3,196</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Net income per share: </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Basic </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.06</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.57</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.67</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Diluted </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.16</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.05</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.49</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.58</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="1%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months  ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Options to purchase common stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">923</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">345</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Convertible preferred stock (if-converted basis) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6,506</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Restricted stock units </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Total </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">941</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6,869</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="90%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td colspan="2" valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Year ending December 31, </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> 2012 (remaining three months) </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">699</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> 2013 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,457</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> 2014 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,446</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> 2015 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,184</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> 2016 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,314</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> 2017 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,265</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> 2018 and beyond </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">24,360</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Total minimum lease payments </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">46,725</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="81%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">December 31, 2011</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Shares reserved for convertible preferred stock </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">13,205,180</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares reserved for stock options and restricted stock units </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7,478,166</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">5,849,131</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Shares reserved for employee stock purchase plan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">451,764</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares reserved for warrants </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,333</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">111,602</td> <td nowrap="nowrap" valign="bottom"> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="3%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td colspan="2" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Options outstanding</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Shares available for grant</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number of shares</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Balances at December 31, 2011 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,343,978</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,505,153</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.25</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Options granted </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(790,364</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">790,364</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">15.11</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Options exercised </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(216,035</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2.36</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Options cancelled </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">197,371</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(197,371</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.28</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Options retired—2001 Plan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">(120,874</td> <td nowrap="nowrap" valign="bottom">) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> Balances at September 30, 2012 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">630,111</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,882,111</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5.98</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="83%"> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="4%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Shares outstanding</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number of shares</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Balances at December 31, 2011 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares granted </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">17,500</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21.88</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Shared vested and paid out </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Shares forfeited </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Balances at September 30, 2012 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">17,500</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">21.88</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="41%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom" colspan="16" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000"> Options outstanding at September 30, 2012 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000">Options exercisable at September 30, 2012</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom" nowrap="nowrap"> Range of exercise price </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number outstanding</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number exercisable</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> $ 0.60 - $ 0.90 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">711,648</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3.5</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">711,648</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">3.5</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $ 2.40 - $ 3.00 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,054,633</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.57</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,356,049</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.52</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> $ 3.30 - $ 5.10 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">497,361</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8.3</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.27</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">189,148</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8.3</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.28</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $ 7.17 - $13.80 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,290,813</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.65</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">173,539</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.65</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> $15.30 - $21.88 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">327,656</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.7</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">19.04</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,514</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.6</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">16.55</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,882,111</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.5</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">5.98</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">12,323</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,432,898</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.79</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">9,257</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="40%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom" colspan="16" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000"> Options outstanding at December 31, 2011 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" nowrap="nowrap" align="center" style="border-bottom:1px solid #000000">Options exercisable at December 31, 2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom" nowrap="nowrap"> Range of exercise price </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number outstanding</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Number exercisable</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average remaining contractual life (years)</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Weighted average exercise price</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Aggregate intrinsic value ($’000s)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> $0.60 - $ 0.90 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">755,519</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">753,126</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4.2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">0.72</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $2.40 - $ 3.00 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,285,729</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">8.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.54</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,107,324</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.7</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.48</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> $3.30 - $ 5.10 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">556,829</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.24</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">87,068</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.0</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">3.69</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr> <td valign="top"> $9.30 - $11.70 </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">907,076</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.8</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.53</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">198,228</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">9.8</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">11.67</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">4,505,153</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">7.8</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">4.25</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">43,005</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2,145,746</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.7</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2.76</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">23,689</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="80%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months  ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="14" align="center">(in thousands)</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Cost of revenue </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">50</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">18</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">104</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">66</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Research and development </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">346</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">117</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">695</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">285</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Selling, general and administrative </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">666</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">248</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1,391</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">433</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">1,062</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">383</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">2,190</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">$</td> <td valign="bottom" align="right">784</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="2%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Expected term (years) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">6.25</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Volatility </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">39</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Risk-free rate </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">0.79-1.03</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">0.79-1.26</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">2.30-2.79</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr> <td valign="top"> Dividend yield </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td nowrap="nowrap" valign="bottom"> </td> <td nowrap="nowrap" valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> </tr>  </table>   <table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="73%"> </td> <td valign="bottom" width="12%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="12%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Three months ended September 30, 2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30, 2012</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> Expected term (years) </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">0.50</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> Volatility </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">30.8</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Risk-free rate </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">0.15</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr> <td valign="top"> Dividend yield </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom">% </td> </tr>  </table>

<table cellspacing="0" cellpadding="0" width="100%" border="0" style="border-collapse:collapse; text-align: left" align="center">  <tr style="visibility:hidden; line-height:0pt; color:white"> <td width="76%"> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> <td valign="bottom" width="5%"> </td> <td> </td> <td nowrap="nowrap"> </td> <td> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Three months  ended September 30,</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="6" align="center" style="border-bottom:1px solid #000000">Nine months  ended September 30,</td> <td valign="bottom"> </td> </tr> <tr> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2012</td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" colspan="2" align="center" style="border-bottom:1px solid #000000">2011</td> <td valign="bottom"> </td> </tr>   <tr bgcolor="#cceeff"> <td valign="top"> China </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">61</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">79</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr> <td valign="top"> Japan </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Korea </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">57</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">37</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">47</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">20</td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr> <td valign="top"> United States </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">21</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">31</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr bgcolor="#cceeff"> <td valign="top"> Other </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">2</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">1</td> <td nowrap="nowrap" valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">—  </td> <td nowrap="nowrap" valign="bottom"> </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr> <tr> <td valign="top"> Total </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom" align="right">100</td> <td nowrap="nowrap" valign="bottom">% </td> </tr> <tr style="font-size:1px"> <td valign="bottom"> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> <td valign="bottom"> </td> <td valign="bottom">   </td> <td valign="bottom">   </td> <td> </td> </tr>  </table>

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0.0161

0.0018

401000

442000

-20000

43971000

12508000

60824000

22396000

13934000

2401000

12590000

3831000

432000

167000

1011000

-1747000

1810000

4775000

4435000

-5751000

-9000

742000

1784000

1000

70000

117000

5000

-90000

-77000

11558000

7766000

20242000

11538000

8684000

3772000

431000

1120000

13962000

13814000

49865000

153334000

12693000

13781000

32411000

8499000

2013-07-06

5000000

10000000

5000000

103000

80000000

69000

642000

1414000

3012000

22052000

-12000

88635000

-1290000

-25794000

12542000

18880000

13934000

2401000

12158000

3664000

618000

63000

6201000

3664000

1839000

208000

6722000

3664000

87565

29475000

10208000

47820000

18603000

14496000

2300000

13004000

3793000

46725000

699000

4314000

4184000

4446000

4457000

24360000

916000

309000

1700000

693000

276000

1781000

-41000

-20000

31000

148000

-557000

101000

-504000

-39000

-8821000

-840000

-3709000

22079000

1299000

3715000

-4495000

-1498000

-2248000

0.001

50000000

2659000

2409000

91548000

91500000

500000

247000

512000

400000

3196000

3802000

13816000

23159000

4467000

8777000

2237000

5509000

103000

102000

14605000

4388000

23047000

9501000

40000

170000

-42147000

-29989000

17.00

79716000

26306000

72805000

32252000

79716000

26306000

105216000

40751000

14870000

5820000

24773000

9102000

784000

2190000

17500

21.88

17500

21.88

0.00

P6Y3M

P6M

P6Y3M

0.39

0.308

0.37

0.60

0.43

0.023

0.0015

0.0079

0.0279

0.0513

0.0126

0.0103

0.0207

23689000

9257000

-197371

790364

43005000

12323000

4505153

4882111

4.25

5.98

2303799

2238164

6.08

9.14

2.04

0.85

2.36

7.28

15.11

2.76

11.67

0.72

3.69

2.48

2.79

16.55

11.65

0.72

4.28

2.52

P6Y8M12D

P9Y9M18D

P4Y2M12D

P9Y

P7Y8M12D

P6Y2M12D

P9Y7M6D

P9Y1M6D

P3Y6M

P8Y3M18D

P7Y

9.30

0.60

3.30

2.40

15.30

7.17

0.60

3.30

2.40

2145746

198228

753126

87068

1107324

2432898

2514

173539

711664

189148

1356049

4505153

907076

755519

556829

2285729

4882111

327656

1290813

711648

497361

2054633

4.25

11.53

0.72

4.24

2.54

5.98

19.04

11.65

0.72

4.27

2.57

P7Y9M18D

P9Y9M18D

P4Y2M12D

P9Y

P8Y

P7Y6M

P9Y8M12D

P9Y2M12D

P3Y6M

P8Y3M18D

P7Y2M12D

11.70

0.90

5.10

3.00

21.88

13.80

0.90

5.10

3.00

-22052000

-1404000

-38445000

139520000

6060707

-216035

98400000

400424913

13205180

74348000

1221000

145000

521000

3400000

16600000

Release a significant portion of the valuation allowance against our U.S.

925000

982000

10956000

20342000

3196000

3802000

13816000

23159000

925000

982000

10956000

20342000