Document and Entity Information Document Information [Table] Statement [Line Items] Schedule II-Valuation and Qualifying Accounts Document Type Document Period End Date Current Fiscal Year End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Entity Central Index Key Amendment Flag Document Quarterly Report Consolidated Statements of Operations Statement [Table] Products and Services [Axis] Products and Services [Domain] Product Service or group of services that are sold by the entity. Services Revenues [Abstract] Revenue: Revenues Total revenue Cost of Revenue [Abstract] Cost of revenue: Cost of Goods and Services Sold Total cost of revenue Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses: Research and Development Expense Research and development Selling and Marketing Expense Sales and marketing General and Administrative Expense General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Income from operations Nonoperating Income (Expense) [Abstract] Other (expense) income: Investment Income, Interest Interest income Interest Expense Interest expense Other Nonoperating Income (Expense) Other, net Nonoperating Income (Expense) Total other expense Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income Tax Expense (Benefit) Income tax expense Income tax provision Net Income (Loss) Available to Common Stockholders, Basic Net income Net income Net income available to common stockholders Computation of Net Earnings per Share Net income per share: Earnings Per Share, Basic Basic Earnings Per Share, Diluted Diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Shares used in computing net income per share: Weighted Average Number of Shares Outstanding, Basic Basic weighted average common shares Weighted average common shares outstanding used in computing basic income per share Weighted Average Number of Shares Outstanding, Diluted Diluted weighted average common shares Weighted average common shares used in computing diluted net income per share Consolidated Statements of Comprehensive Income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive loss: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent Amortization of actuarial gain and other adjustments from pension plan, net of tax Change in pension obligation Other Comprehensive Income (Loss), Net of Tax Total other comprehensive loss Other comprehensive income and pension reclassification Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Consolidated Balance Sheets Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable, net Inventory, Net Inventories, net Inventories, net Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property, plant and equipment, net Operating Lease, Right-of-Use Asset Operating lease assets Finance Lease, Right-of-Use Asset Finance lease assets, net Finance lease assets Restricted Cash and Cash Equivalents, Noncurrent Long-term restricted cash Deferred Tax Assets, Net. Deferred income taxes Deferred tax assets, net Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Employee-related Liabilities, Current Accrued compensation Product Warranty Accrual, Current Warranty Amount classified as current Accrued Income Taxes, Current Income taxes Contract with Customer, Liability, Current Deferred revenue Finance Lease, Liability, Current Finance liabilities current Current portion of finance lease obligation Other Liabilities, Current Other current liabilities Liabilities, Current Total current liabilities Finance Lease, Liability, Noncurrent Finance liabilities noncurrent Long-term finance lease obligation Contract with Customer, Liability, Noncurrent Long-term deferred revenue Other Liabilities, Noncurrent Other long-term liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies (Note 16) Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Common Stock, Value, Outstanding Common stock, $0.001 par value, 75,000 shares authorized; 33,064 shares issued and outstanding at March 31, 2022; 33,240 shares issued and outstanding at December 31, 2021 Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings (accumulated deficit) Accumulated Other Comprehensive Income (Loss), Net of Tax Balance at March 31, 2022 Balance at December 31, 2021 Accumulated other comprehensive income Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Consolidated Statements of Stockholders' Equity Equity Components [Axis] Equity Component [Domain] Common Stock Additional Paid-in Capital Accumulated Deficit Accumulated Other Comprehensive Income (Loss) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Shares, Outstanding Balance (in shares) Balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options (in shares) Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Issuance of common shares on restricted stock units, net of shares withheld (in shares) Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of common shares on restricted stock units, net of shares withheld Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Treasury shares returned to authorized, Shares Repurchase of common stock (in shares) Treasury shares returned to authorized, Value Repurchase of common stock Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Deferred Income Tax Expense (Benefit) Deferred income taxes Share-based Compensation Stock-based compensation expense Inventory Write-down Provision for excess and obsolete inventory Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and other current liabilities Increase Decrease In Contract With Customer Liability Deferred revenue Increase (Decrease) in Income Taxes Payable Income taxes Increase (Decrease) in Other Operating Assets and Liabilities, Net Other assets and liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Payments to Acquire Property, Plant, and Equipment Expenditures for property, plant and equipment and capitalized software Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities The net cash out flow on net settlement of restricted stock grants. Repayment of Net Settlement on Restricted Stock Grants Net settlement on restricted stock grants Payments for Repurchase of Common Stock Repurchase of common stock Finance Lease, Principal Payments Principal payments on finance lease obligation Financing cash outflows from finance leases Proceeds from Stock Options Exercised Proceeds from exercise of stock options Proceeds from exercise of stock options Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash at beginning of period Total cash, cash equivalents and restricted cash Nature of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Nature of Business Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Leases The entire disclosure of information about leases. Lease Disclosure [Text Block] Leases Revenue. Revenue from Contract with Customer [Text Block] Revenue Receivables and Allowances for Credit Losses Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Receivables and Allowances for Credit Losses Earnings Per Share [Text Block] Computation of Net Earnings per Share Accumulated Other Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income N/A Cash, cash equivalents and restricted cash The entire disclosure of cash, cash equivalents and restricted cash. Cash Cash Equivalents And Restricted Cash [Text Block] Cash, cash equivalents and restricted cash Inventories, net Inventory Disclosure [Text Block] Inventories, net Product Warranty Product Warranty Disclosure [Text Block] Product Warranty Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Financing Arrangements Debt Disclosure [Text Block] Financing Arrangements Income Taxes Income Tax Disclosure [Text Block] Income Taxes Concentration of Risk Concentration Risk Disclosure [Text Block] Concentration of Risk Share Repurchase Stockholders' Equity Note Disclosure [Text Block] Share Repurchase Contingencies Commitments and Contingencies Disclosure [Text Block] Contingencies The tabular disclosure of lease balance sheet. Lease Balance Sheet Disclosure [Table Text Block] Schedule of operating and finance lease right-of-use assets and related lease obligations Lease, Cost [Table Text Block] Schedule of lease costs Tabular disclosure of undiscounted cash flows of lessee's operating lease liability and finance lease liability. Operating And Finance Lease Liability Maturity [Table Text Block] Schedule of future minimum operating and finance leases The tabular disclosure of lease quantitative information. Lease Quantitative Disclosure [Table Text Block] Schedule of weighted-average remaining lease term and discount rates The tabular disclosure of lease cash flow information. Lease Cash Flow Information Disclosure [Table Text Block] Schedule of cash outflows by lease type Tabular disclosure of revenue from external customers by discipline areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. Revenue From External Customers By Discipline Areas Table Text Block Schedule of revenue by discipline Revenue from External Customers by Geographic Areas [Table Text Block] Schedule of revenue by geographic markets Contract with Customer, Asset and Liability [Table Text Block] Schedule of Contract liabilities Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of allowances for credit losses related to trade receivables Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of components of net income per share Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of changes in accumulated other comprehensive loss, net of tax Tabular disclosure for cash, cash equivalents and restricted cash. Cash Cash Equivalents And Restricted Cash [Table Text Block] Schedule of reconciliation of cash, cash equivalents and restricted cash Schedule of Inventory, Current [Table Text Block] Schedule of components of inventories Schedule of Product Warranty Liability [Table Text Block] Schedule of product warranty liability Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Company's assets and liabilities by level within the fair value hierarchy Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Equity Award [Domain] Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-Based Compensation Allocated Share-based Compensation Expense Stock-based compensation expense Lessee, Lease, Description [Table] Range [Axis] Range [Domain] Minimum Maximum Lessee, Lease, Description [Line Items] Lease Lessee, Operating Lease, Existence of Option to Extend [true false] Option to extend Lessee, Operating Lease, Renewal Term Renewal term Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Amount of lessee's right to use underlying asset under operating and finance lease. Operating And Finance Lease, Right-of-Use Asset Total leased assets Operating Lease, Liability, Current Operating liabilities current Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Operating Lease, Liability, Noncurrent Operating liabilities noncurrent Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Present value of lessee's discounted obligation for lease payments from operating and finance lease. Operating and Finance Lease, Liability Total lease liabilities Total lease liabilities Operating Lease, Liability, Statement of Financial Position [Extensible List] The cumulative amount of depreciation of finance leased assets. Finance Lease, Accumulated Depreciation Finance lease, accumulated depreciation Prepaid Rent Prepaid financing costs Income Statement Location [Axis] Income Statement Location [Domain] Represents information pertaining to product or service member. Product / Services Research and development Sales and marketing* General and administrative* Lease, Cost [Abstract] Lease cost Operating Lease, Cost Total operating lease cost Finance Lease, Right-of-Use Asset, Amortization Depreciation of leased assets Finance Lease, Interest Expense Interest on lease liabilities Amount of finance lease cost recognized by lessee for lease contract. Finance Lease Cost Total finance lease cost Lease, Cost Total lease cost Amount of short-term and variable lease cost. Short-term And Variable Lease, Cost Short-term lease and variable lease costs Finance Lease Liabilities, Payments, Due [Abstract] Future minimum lease payments finance lease Finance Lease, Liability, Payments, Remainder of Fiscal Year 2022 Finance Lease, Liability, Payments, Due Next Twelve Months 2023 Finance Lease, Liability, Payments, Due Year Two 2024 Finance Lease, Liability, Payments, Due Year Three 2025 Finance Lease, Liability, Payments, Due Year Four 2026 Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Finance Lease Liability Payments Due After Year Four Thereafter Finance Lease, Liability, Payments, Due Total lease payments Finance Lease, Liability, Undiscounted Excess Amount Less interest portion Finance Lease, Liability Finance lease obligations Operating Lease Liabilities, Payments Due [Abstract] Future minimum lease payments operating lease Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2022 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months 2023 Lessee, Operating Lease, Liability, Payments, Due Year Two 2024 Lessee, Operating Lease, Liability, Payments, Due Year Three 2025 Lessee, Operating Lease, Liability, Payments, Due Year Four 2026 Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Lessee Operating Lease Liability Payments Due After Year Four Thereafter Lessee, Operating Lease, Liability, Payments, Due Total lease payments Lessee, Operating Lease, Liability, Undiscounted Excess Amount Less interest portion Operating Lease, Liability Operating lease obligations n/a. Finance And Operating Lease Liabilities Payments Due [Abstract] Future minimum lease payments finance and operating lease Amount of lessee's undiscounted obligation for lease payments for finance and operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year. Lessee Operating And Finance Lease Liability Payments Remainder Of Fiscal Year 2022 Amount of lessee operating and finance lease liability payments due next twelve months. Lessee Operating And Finance Lease Liability Payments Due Next Twelve Months 2023 Amount of lessee's undiscounted obligation for lease payments for finance and operating lease, due in second fiscal year following latest fiscal year. Lessee Operating And Finance Lease Liability Payments Due Year Two 2024 Amount of lessee's undiscounted obligation for lease payments for finance and operating lease, due in third fiscal year following latest fiscal year. Lessee Operating And Finance Lease Liability Payments Due Year Three 2025 Amount of lessee's undiscounted obligation for lease payments for finance and operating lease, due in fourth fiscal year following latest fiscal year. Lessee Operating And Finance Lease Liability Payments Due Year Four 2026 Amount of lessee's undiscounted obligation for lease payments for finance and operating lease, due after fourth fiscal year following latest fiscal year. Lessee Operating And Finance Lease Liability Payments Due After Year Four Thereafter Amount of lessee's undiscounted obligation for lease payments for finance and operating lease. Lessee Operating And Finance Lease Liability Payments Due Total lease payments Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance and operating lease. Lessee Operating And Finance Lease Liability Undiscounted Excess Amount Less interest portion n/a. Weighted Average Remaining Lease Term And Discount Rate [Abstract] Lease term and discount rate Operating Lease, Weighted Average Remaining Lease Term Operating leases -Weighted-average remaining lease term (in years) Finance Lease, Weighted Average Remaining Lease Term Finance leases - Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Discount Rate, Percent Operating leases - Weighted-average discount rate Finance Lease, Weighted Average Discount Rate, Percent Finance leases - Weighted-average discount rate Lessee Operating Lease Term Of Contract Lease term Operating lease term Lessee, Finance Lease, Term of Contract Finance lease term Operating Lease, Payments Operating cash outflows from operating leases Finance Lease, Interest Payment on Liability Operating cash outflows from finance leases Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Operating lease assets obtained in exchange for operating lease liabilities Disaggregation of Revenue [Table] Represents information pertaining to revenue arising from the sale of new systems, a product line of the entity. Systems Represents information pertaining to Aftermarket. Aftermarket Disaggregation of Revenue [Line Items] Disaggregation of Revenue Represents the percentage of payment terms due upon shipment of tool. Percentage of Payment Upon Shipment of Tool Payment upon shipment of tool, as a percent Represents the percentage of payment terms due upon installation. Percentage of Payment Upon Installation Payment upon installation, as a percent Represents the period for payment upon delivery of parts. Period of Payment Upon Delivery of Parts Payment upon delivery of parts, period Geographical [Axis] Geographical [Domain] North America Asia Pacific Europe Revenue from Contract with Customer, Excluding Assessed Tax Total Revenue Contract with Customer, Liability Balance, end of the period Balance, beginning of the period Contract liabilities The amount of deferral of revenue in obligation to transfer good or service to customer for which consideration from customer has been received or is due. Contract with Customer, Liability, Deferral Of Revenue Deferral of revenue Contract with Customer, Liability, Revenue Recognized Recognition of deferred revenue Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Computation of Net Earnings per Share Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Incremental options and RSUs Net earnings per share Net income per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive common equivalent shares excluded from calculation Accumulated Other Comprehensive Income [Table] Foreign currency Defined benefit pension plans Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] Changes in accumulated other comprehensive income, net of tax Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Revolving credit facility Restricted Cash and Cash Equivalents Long-term restricted cash Represents the information pertaining to the portion of the line of credit availability being used to support the outstanding letters of credit. Line of Credit Facility, Portion of Availability Used to Support Outstanding Letters of Credit Restricted cash which relates to support of outstanding letters of credit Workers' Compensation Liability Letter of credit related to workers' compensation insurance The amount of deposits relating customs activity. Deposit Relating To Customs Activity Deposit related to customs activity Inventory, Current [Table] Inventory [Line Items] Inventories, net Inventory, Raw Materials, Net of Reserves Raw materials Inventory, Work in Process, Net of Reserves Work in process Inventory, Finished Goods, Net of Reserves Finished goods (completed systems) Represents the period for which the warranty is offered for the products sold. Product Warranty Period Product warranty period Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Changes in standard product warranty liability Product Warranty Accrual Balance at March 31 (end of period) Balance at January 1 (beginning of year) Total warranty liability Product Warranty Accrual, Warranties Issued Warranties issued during the period Product Warranty Accrual, Payments Settlements made during the period Product Warranty Accrual, Preexisting, Increase (Decrease) Changes in estimate of liability for pre-existing warranties during the period Product Warranty Accrual, Balance Sheet Classification [Abstract] Product warranty classification Product Warranty Accrual, Noncurrent Amount classified as long-term Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Level 1 Asset Class [Axis] Asset Class [Domain] Includes fund that invests in short-term money-market instruments, for example, but not limited to, commercial paper, banker's acceptances, repurchase agreements, United States government securities, certificates of deposit, and other highly liquid securities including Agency investments, all of which are considered cash equivalents. Money market funds, US Government Securities and Agency Investments Measurement Basis [Axis] Portion at Fair Value Measurement [Member] Estimate of fair value measurement Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements Cash and Cash Equivalents, Fair Value Disclosure Money market funds, U.S. Government Securities and Agency Investments Schedule of Long-term Debt Instruments [Table] Counterparty Name [Axis] Counterparty Name [Domain] Represents the information pertaining to Beverly Property Owner LLC Beverly Property Owner LLC Represents information pertaining to Silicon Valley Bank. Silicon Valley Bank Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Building Represents information pertaining to the sale and leaseback transaction. Sale leaseback obligation Credit Facility [Axis] Credit Facility [Domain] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Letter of credit Debt Instrument [Line Items] Financing Arrangements Proceeds from Sale of Property Held-for-sale Proceeds from sale of corporate headquarters Security Deposit Security deposit Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity under the credit facility Line of Credit Facility, Fair Value of Amount Outstanding Borrowings amount Letters of Credit Outstanding, Amount Letter of credit Valuation Allowance [Table] Valuation Allowance [Line Items] Valuation allowance Amount of increase in current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Increase In Income Tax Expense (Benefit) Increase in income tax expense Represents the amount of increase in pretax income. Increase In Pre Tax Income Increase in pretax income Amount of operating loss carryforwards are subject to an uncertain tax position reserve. Operating Loss Carryforwards are Subject to Uncertain Tax Position Reserve Uncertain tax position Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Statutory income tax rate (as a percent) Deferred Tax Assets, Valuation Allowance Deferred tax assets valuation allowance Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Total revenue Accounts receivable Concentration Risk Type [Axis] Concentration Risk Type [Domain] Customer concentration risk Credit concentration risk Customer [Axis] Customer [Domain] Represents one customer on whom the entity significantly relies giving rise to the largest single concentration risk. First customer Represents one customer on whom the entity significantly relies giving rise to the second largest single concentration risk. Second customer Represents one customer on whom the entity significantly relies giving rise to the third largest single concentration risk. Third customer Concentration Risk [Line Items] Concentration of Risk Represents the number of customers on whom the entity significantly relies giving rise to concentration risk. Concentration Risk Number of Customers Number of customers Concentration Risk, Percentage Percentage of concentration risk Stock Repurchase Program, Authorized Amount Share repurchase program common stock authorized amount Treasury Stock, Shares, Acquired Number of shares repurchased Treasury Stock Acquired, Average Cost Per Share Average cost