Organization and Significant Accounting Policies | 1. Organization and Significant Accounting Policies Organization — Ultra Clean Holdings, Inc. (the “Company” or “UCT”) was founded in November 2002 for the purpose of acquiring Ultra Clean Technology Systems and Service, Inc. Ultra Clean Technology Systems and Service, Inc. was founded in 1991 by Mitsubishi Corporation and was operated as a subsidiary of Mitsubishi until November 2002, when it was acquired by UCT. UCT became a publicly traded company in March 2004. Ultra Clean Technology (Shanghai) Co., Ltd (“UCTS”) and Ultra Clean Micro-Electronics Equipment (Shanghai) Co., Ltd. (“UCME”) were established in 2005 and 2007, respectively, to facilitate the Company’s operations in China. In December 2015, UCTS merged into UCME. Ultra Clean Asia Pacific, Pte, Ltd. (Singapore) was established in fiscal year 2008 to facilitate the Company’s operations in Singapore. In July 2012, UCT acquired American Integration Technologies LLC (“AIT”) to add to the Company’s existing customer base in the semiconductor and medical spaces and to provide additional manufacturing capabilities. In February 2015, UCT acquired Marchi Thermal Systems, Inc. (“Marchi”), a designer and manufacturer of specialty heaters, thermocouples and temperature controllers. Marchi delivers flexible heating elements and thermal solutions to our customers. The Company believes heaters are increasingly critical in equipment design for the most advanced semiconductor nodes. In July 2015, UCT acquired MICONEX s.r.o. (“Miconex”), a privately-held provider of advanced precision fabrication of plastics, primarily for the semiconductor industry that was expected to expand the Company’s capabilities with existing customers. In May 2018, Marchi and Miconex changed their names to UCT Thermal Solutions, Inc. (“Thermal”) and to UCT Fluid Delivery Solutions s.r.o (“FDS”), respectively. In August 2018, the Company acquired Quantum Global Technologies, LLC (“QGT”), a provider of ultra-high purity outsourced parts cleaning, process tool part recoating, surface treatment and analytical services to the semiconductor and related industries, for a total purchase price of approximately $340.8 million. See Note 4 to the Company’s Condensed Consolidated Financial Statements for further information about the acquisitions of QGT and DMS. On April 15, 2019, the Company purchased substantially all of the assets of Dynamic Manufacturing Solutions, LLC ("DMS"), a semiconductor weldment and solutions provider, for a total purchase price of $31.4 million. Basis of Presentation — The unaudited condensed consolidated financial statements included in this quarterly report on Form 10-Q include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). This financial information reflects all adjustments which are, in the opinion of the Company, normal, recurring and necessary for the fair financial statement presentation for the dates and periods presented. Certain information and footnote disclosures normally included in our annual financial statements, prepared in accordance with GAAP, have been condensed or omitted. The Company’s December 28, 2018 balance sheet data were derived from its audited financial statements as of that date. Principles of Consolidation — The Company’s condensed consolidated financial statements include the accounts of the Company and its subsidiaries with the ownership interests of minority shareholders presented as noncontrolling interests. All intercompany accounts and transactions have been eliminated in consolidation. The Company uses a 52-53 week fiscal year ending on the Friday nearest December 31. All references to quarters refer to fiscal quarters and all references to years refer to fiscal years. Segments — The Financial Accounting Standards Board’s (FASB) guidance regarding disclosure about segments in an enterprise and related information establishes standards for the reporting by public business enterprises of information about reportable segments, products and services, geographic areas, and major customers. The method for determining what information to report is based on the manner in which management organizes the reportable segments within the Company for making operational decisions and assessments of financial performance. The Company’s chief operating decision-maker is the Chief Executive Officer. In March 2019, the Company effected a change in the reporting of its segment financial results to better reflect the reorganization within the Company due to the acquisition of QGT. The Company now operates and reports two segments. See Note 12 to the Company’s Condensed Consolidated Financial Statements. Foreign Currency Translation and Remeasurement — FDS’ functional currency is not its local currency or the U.S. dollar. The Company remeasures the monetary assets and liabilities of FDS to its functional currency. Gains and losses from these remeasurements are recorded in interest and other income (expense), net. The Company then translates the assets and liabilities of FDS into the U.S. dollar. Gains and losses from these translations are recognized in foreign currency translation included in accumulated other comprehensive income (AOCI) within stockholders’ equity. The functional currency of the Company’s other international subsidiaries are either the U.S. dollar or their local currency. For the Company’s foreign subsidiaries where the local currency is the functional currency, we translate the financial statements of these subsidiaries to U.S. dollars using month-end exchange rates for assets and liabilities, and average rates of exchange for revenue, costs and expenses. Translation gains and losses are recorded in AOCI as a component of stockholders' equity. Use of Accounting Estimates — The presentation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosures of contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Such estimates and assumptions include reserves on inventory, valuation of deferred tax assets, impairment of goodwill, valuation of pension obligations and other long-lived assets. The Company bases its estimates and judgments on historical experience and on various other assumptions that it believes are reasonable under the circumstances. However, future events are subject to change and the best estimates and judgments routinely require adjustments. Actual amounts may differ from those estimates. Concentration of Credit Risk — Financial instruments which subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. The Company sells its products primarily to semiconductor capital equipment manufacturers in the United States. The Company performs credit evaluations of its customers’ financial condition and generally requires no collateral Fair Value of Measurements — The Company measures its cash equivalents and contingent earn-out liability at fair value on a recurring basis. In August 2018, the Company repaid its debt with East West Bank and as a result, the related interest rate swap contract was consequently cancelled. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified in accordance with a three-tier fair value hierarchy based on the observability of the inputs available in the market used to measure fair value: Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2 — Inputs that are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant inputs are observable in the market or can be derived from observable market data. Where applicable, these models project future cash flows and discount the future amounts to a present value using market-based observable inputs including interest rate curves, foreign exchange rates, and credit ratings. Level 3 — Unobservable inputs that are supported by little or no market activities. The fair value hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The following table summarizes, for assets or liabilities measured at fair value, the respective fair value and the classification by level of input within the fair value hierarchy (in thousands): Fair Value Measurement at Reporting Date Using Description June 28, 2019 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other assets: Forward contracts $ 188 $ — $ 188 $ — Other liabilities: Contingent earn-out liabilities $ 3,870 $ — $ — $ 3,870 Pension obligation $ 3,293 $ — $ — $ 3,293 Purchase obligation $ 8,500 $ — $ — $ 8,500 Fair Value Measurement at Reporting Date Using Description December 28, 2018 Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Other assets: Forward contracts $ 240 $ — $ 240 $ — Other liabilities: Contingent earn-out liability $ 3,924 $ — $ — $ 3,924 Pension obligation $ 3,531 $ — $ — $ 3,531 Purchase obligation $ 8,500 $ — $ — $ 8,500 The Company’s Level 3 liabilities are incurred as a result of the QGT and DMS acquisitions. There were no transfers from Level 1 or Level 2 to Level 3. Fair value adjustments were noncash, and therefore did not impact the Company’s liquidity or capital resources. Qualitative information about Level 3 fair value measurements are primarily as follows (in thousands, except the range): June 28, Valuation Unobservable 2019 Techniques Input Range Contingent earn-out liability $ 3,870 Monte carlo simulation Revenue discount rate 10.0% - 15.0% Internal forecasts 7.5 % Pension obligation $ 3,293 Projected unit credit method Discount rate 2.43% - 2.74% Rate on return 1.37% - 1.78% Salary increase rate 4.42 % Purchase obligation $ 8,500 Discounted cash flow EBITDA Multiple 6.21 Following is a summary of the Level 3 activity (in thousands): Contingent earn-out liability Purchase obligation Pension obligation As of December 28, 2018 $ 3,924 $ 8,500 $ 3,531 Additions 1,428 — — Fair value adjustments (1,482 ) — (238 ) As of June 28, 2019 $ 3,870 $ 8,500 $ 3,293 Derivative Financial Instruments — The Company recognizes derivative instruments as either assets or liabilities in the accompanying Condensed Consolidated Balance Sheets at fair value. The Company records changes in the fair value of the derivatives in the accompanying Condensed Consolidated Statements of Operations as interest and other income (expense), net, or as a component of AOCI in the accompanying Condensed Consolidated Balance Sheets. Inventories — Inventories are stated at the lower of standard cost (which approximates actual cost on a first-in, first-out basis) or net realizable value. The Company evaluates the valuation of all inventories, including raw materials, work-in-process, finished goods and spare parts on a periodic basis. Obsolete inventory or inventory in excess of management’s estimated usage is written-down to its estimated market value less costs to sell, if less than its cost. Inherent in the estimates of market value are management’s estimates related to economic trends, future demand for products, and technological obsolescence of the Company’s products. Inventory write downs inherently involve judgments as to assumptions about expected future demand and the impact of market conditions on those assumptions. Although the Company believes that the assumptions it used in estimating inventory write downs are reasonable, significant changes in any one of the assumptions in the future could produce a significantly different result. There can be no assurances that future events and changing market conditions will not result in significant increases in inventory write downs. Property and — Property and equipment are stated at cost, or, in the case of equipment under capital leases, the present value of future minimum lease payments at inception of the related lease. Depreciation and amortization are computed using the straight-line method over the lesser of the estimated useful lives of the assets or the terms of the leases. Useful lives range from three Internal use software — Direct costs incurred to develop software for internal use are capitalized and amortized over an estimated useful life of three to five years. Costs related to the design or maintenance of internal use software are expensed as incurred. Capitalized internal use software is included in computer equipment and Construction in progress — Construction in progress is related to the construction or development of property and equipment that has not yet been placed in service for their intended use and is, therefore, not depreciated. Income Taxes — The Company utilizes the asset and liability method of accounting for income taxes, under which deferred taxes are determined based on the temporary differences between the financial statement and tax basis of assets and liabilities using tax rates expected to be in effect during the years in which the basis differences reverse. Deferred income taxes arise from temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements, which will result in taxable or deductible amounts in the future. In evaluating our ability to realize our deferred tax assets within the jurisdiction from which they arise, we consider all available positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of recent operations. In projecting future taxable income, we begin with historical results and incorporate assumptions about the amount of future state, federal, and foreign pretax operating income adjusted for items that do not have tax consequences. The assumptions about future taxable income require significant judgment and are consistent with the plans and estimates we are using to manage the underlying businesses. In evaluating the objective evidence that historical results provide, we consider recent cumulative income (loss). A valuation allowance is recorded when it is more likely than not that some of the deferred tax assets will not be realized. The Company continued to maintain a full valuation allowance on its federal and state deferred tax amounts as of June 28, 2019. Income tax positions must meet a more likely than not recognition threshold to be recognized. Income tax positions that previously failed to meet the more likely than not threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more likely than not threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits within the Condensed Consolidated Statements of Operations as income tax expense. The calculation of tax liabilities involves significant judgment in estimating the impact of uncertainties in the application of complex tax laws. Resolution of these uncertainties in a manner inconsistent with the Company’s expectations could have a material impact on its results of operations and financial position. Management believes that it has adequately provided for any adjustments that may result from these examinations; however, the outcome of tax audits cannot be predicted with certainty. Revenue Recognition — See Note 2 to the Company’s Condensed Consolidated Financial Statements. Research and Development Costs — Research and development costs are expensed as incurred. Net Income per Share — Basic net income per share is computed by dividing net income by the weighted average number of shares outstanding for the period. Diluted net income per share is calculated by dividing net income by the weighted average number of common shares outstanding and common equivalent shares from dilutive stock options and restricted stock using the treasury stock method, except when such shares are anti-dilutive. See Note 10 to the Company’s Condensed Consolidated Financial Statements. Business Combinations — The Company recognizes assets acquired (including goodwill and identifiable intangible assets) and liabilities assumed, and noncontrolling interests, if any, at fair value on the acquisition date. Subsequent changes to the fair value of such assets acquired and liabilities assumed are recognized in earnings, after the expiration of the measurement period, a period not to exceed 12 months from the acquisition date. Acquisition-related expenses and acquisition-related restructuring costs are recognized in earnings in the period in which they are incurred. Results of operations and cash flows of acquired companies are included in the Company’s operating results from the date of acquisition. Noncontrolling interests — Noncontrolling interests are recognized to reflect the portion of the equity of the majority-owned subsidiaries which is not attributable, directly or indirectly, to the controlling stockholder. Through the acquisition of QGT in August 2018, the Company’s consolidated entities include partially-owned entities through which the Company is obligated to own 86.0% of its consolidated subsidiary, Cinos Co., Ltd (“Cinos”), a Korean company that provides outsourced cleaning and recycling of precision parts for the semiconductor industry through its operating facilities in South Korea and, through a 60.0% interest in a company, Cinos Xian Clean Technology, Ltd. (“Cinos Xian”), in China. The interest held by others in Cinos and in Cinos Xian are presented as noncontrolling interests in the accompanying condensed consolidated financial statements. The noncontrolling interest will continue to be attributed its share of gains and losses even if that attribution results in a deficit noncontrolling interest balance. Defined Benefit Plan — QGT has a statutorily-required, noncontributory defined benefit plan covering substantially all of the employees of one of its foreign entities upon termination of their employee services. The benefits are based on expected years of service and average compensation. QGT records annual amounts relating to the defined benefit plan based on calculations that incorporate various actuarial and other assumptions, including discount rates, mortality rates, assumed rates of return, compensation increases, employee demographics, and turnover rates. QGT reviews its assumptions on an annual basis and makes modifications to those assumptions based on current asset returns, rates, and trends. The effect of modifications to those assumptions is recorded in accumulated other comprehensive income and amortized to net periodic costs over the future service period using the corridor method. The Company believes that the assumptions utilized in recording its obligations under the plan are reasonable based on its experience and market conditions. The net period costs are recognized as employees render the services necessary to earn the post termination benefits. Deferred Debt Issuance Costs — Debt issuance costs incurred in connection with obtaining debt financing are deferred and presented as a direct deduction from Bank Borrowings in the accompanying condensed consolidated balance sheets. Costs incurred in connection with revolving credit facilities and letter of credit facilities are deferred and presented as an offset to bank borrowings in the accompanying condensed consolidated balance sheets. Deferred costs are amortized on an effective interest method basis over the contractual term. Leases — See Note 9 to the Company’s Condensed Consolidated Financial Statements. Stock-Based Compensation Expense The Company maintains stock-based compensation plans which allow for the issuance of equity-based awards to executives, directors and certain employees. These equity-based awards include stock options, restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) which can be either time-based or performance-based. The Company has not granted stock options to its employees since fiscal year 2010. The Company also maintains an employee stock purchase plan that provides for the issuance of shares to all eligible employees of the Company at a discounted price. Stock-based compensation expense includes compensation costs related to estimated fair values of stock options and awards granted. The estimated fair value of the Company’s equity-based awards, net of expected forfeitures, is amortized on a straight-line basis over the awards’ vesting period, typically three years for RSUs and one year for RSAs, and is adjusted for subsequent changes in estimated forfeitures related to all equity-based awards and performance as it relates to performance-based RSUs. The Company applies the fair value recognition provisions based on the FASB’s guidance regarding stock-based compensation. Employee Stock Purchase Plan The Company also maintains an employee stock purchase plan (“ESPP”) that provides for the issuance of shares to all eligible employees of the Company at a discounted price. Under the ESPP, substantially all employees may purchase the Company’s common stock through payroll deductions at a price equal to 95 percent of the fair market value of the Company’s stock at the end of each applicable purchase period. Restricted Stock Units and Restricted Stock Awards The Company grants RSUs to employees and RSAs to non-employee directors as part of the Company’s long term equity compensation plan. Restricted Stock Units — RSUs are granted to employees with a per share or unit purchase price of zero dollars and either have time based or performance based vesting. RSUs typically vest over three years, subject to the employee’s continued service with the Company. For purposes of determining compensation expense related to these RSUs, the fair value is determined based on the closing market price of the Company’s common stock on the date of award. The expected cost of the grant is reflected over the service period, and is reduced for estimated forfeitures. There were 727,676 RSUs and 144,183 PSUs granted during the quarter ended June 28, 2019, with a weighted average fair value of $12.26 and $12.00, respectively. During the quarter ended March 29, 2019, the Company granted 49,192 RSUs, with a weighted average fair value of $8.98 per share. During the six months ended June 28, 2019, 121,864 vested shares were withheld to satisfy withholding tax obligations, resulting in the net issuance of 386,219 shares. As of June 28, 2019, approximately $19.0 million of stock-based compensation cost, net of estimated forfeitures, related to RSUs and PSUs remains to be amortized over a weighted average period of 2.2 years. As of June 28, 2019, a total of 2,085,333 RSUs and PSUs remain outstanding with an aggregate intrinsic value of $29.0 million and a weighted average remaining contractual term of 1.4 years. Restricted Stock Awards — As of June 28, 2019, a total of 75,213 RSAs were outstanding. The total unamortized expense of the Company’s unvested restricted stock awards as of June 28, 2019 was $0.7 million The following table summarizes the Company’s RSU, PSU and RSA activity for the six months ended June 28, 2019: Shares Aggregate Fair Value (in thousands) Unvested restricted stock units and restricted stock awards at December 28, 2018 1,777,379 $ 14,592 Granted 979,326 Vested (540,663 ) Forfeited (55,496 ) Unvested restricted stock units and restricted stock awards at June 28, 2019 2,160,546 $ 30,075 Vested and expected to vest restricted stock units and restricted stock awards at June 28, 2019 1,797,789 $ 25,025 The following table shows the Company’s stock-based compensation expense included in the Condensed Consolidated Statements of Operations (in thousands): Three Months Ended Six Months Ended June 28, June 29, June 28, June 29, 2019 2018 2019 2018 Cost of sales (1) $ 566 $ 517 $ 1,204 $ 1,023 Research and development 45 10 88 71 Sales and marketing 329 193 674 396 General and administrative 1,924 1,636 3,811 3,430 2,864 2,356 5,777 4,920 Income tax benefit (3,146 ) (312 ) (4,609 ) (540 ) Stock-based compensation expense, net of tax $ (282 ) $ 2,044 $ 1,168 $ 4,380 (1) Stock-based compensation expense capitalized in inventory for the three and six months ended June 28, 2019 and June 29, 2018 was not significant. Recently Adopted Accounting Pronouncements Beginning fiscal 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2016-02, "Leases (Topic 842)" and as part of that process the Company made the following elections: • The Company did not elect to use hindsight for transition when considering judgments and estimates such as assessments of lessee options to extend or terminate a lease or purchase the underlying asset. • For all asset classes, the Company elected to not recognize a right-of-use asset and lease liability for leases with a term of 12 months or less. • For all asset classes, the Company elected to not separate non-lease components from lease components to which they relate and have accounted for the combined lease and non-lease components as a single lease component. • In March 2018, the FASB approved an optional transition method that allows companies to use the effective date as the date of initial application on transition. The Company elected this transition method, and as a result, will not adjust its comparative period financial information or make the newly required lease disclosures for periods before the effective date. The Company determines if an arrangement is a lease at inception. Operating leases are included in the consolidated condensed balance sheet as right-of-use assets from operating leases, current operating lease liabilities and long-term operating lease liabilities. Finance leases are included in property, plant and equipment, current other liabilities and other non-current liabilities in the consolidated condensed balance sheet. Most of the Company’s lease agreements contain renewal options; however, the Company did not recognize right-of-use assets or lease liabilities for renewal periods unless it is determined that we are reasonably certain of renewing the lease at inception or when a triggering event occurs. Some of the Company’s lease agreements contain rent escalation clauses, rent holidays, capital improvement funding or other lease concessions. The Company recognizes minimum rental expense on a straight-line basis based on the fixed components of a lease arrangement. The Company amortizes this expense over the term of the lease beginning with the date of initial possession, which is the date the Company enters the leased space and begins to make improvements in preparation for its intended use. Variable lease components represent amounts that are not fixed in nature and are not tied to an index or rate, and are recognized as incurred. In determining right-of-use assets and lease liabilities, the Company applied a discount rate to the minimum lease payments within each lease agreement. ASC 842 requires companies to use the rate of interest that a lessee would have to pay to borrow on a collateralized basis over a similar term, an amount equal to the lease payments in a similar economic environment. When the Company cannot readily determine the discount rate implicit in the lease agreement, the Company utilizes its incremental borrowing rate. For additional information on the required disclosures related to the impact of adopting this standard, see Note 9 to the consolidated condensed financial statements. Adoption of the new standard resulted in the recording of operating lease right of use assets and lease liabilities at the beginning of 2019 of $35.7 million and $38.5 million, respectively, with the difference due to deferred rent that was reclassified to the right-of-use asset value. All other |