Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Title of 12(b) Security Title of 12(b) Security Subsequent Events Subsequent Event [Member] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Document Fiscal Year Focus Document Fiscal Year Focus Performance obligations expected to be satisfied, expected timing Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Adjustment to Compensation, Amount Adjustment to Compensation Amount Financial Instrument [Axis] Financial Instrument [Axis] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Restructuring Plan [Axis] Restructuring Plan [Axis] Common stock Common Stock, Value, Issued Tax payment for employee shares withheld Payment, Tax Withholding, Share-Based Payment Arrangement Payroll, benefits, incentives and commissions payable Employee-related Liabilities, Current Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] August 2025 Authorization August 2025 Authorization [Member] August 2025 Authorization Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Restructuring - inventory reserve Restructuring - inventory reserve Inventory Write-down Customer A Customer A [Member] Represents customer A. Amendment Flag Amendment Flag Current liabilities: Liabilities, Current [Abstract] Average price paid per share May 2026 (in dollars per share) Shares Acquired, Average Cost Per Share Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Schedule of Contract With Customer, Contract Liability, Activity Contract With Customer, Contract Liability, Activity [Table Text Block] Contract With Customer, Contract Liability, Activity Discrete items Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount Loss Contingencies [Table] Loss Contingencies [Table] Oman OMAN Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent PEO Total Compensation Amount PEO Total Compensation Amount Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Share Repurchase Program [Domain] Share Repurchase Program [Domain] Basic (in shares) Basic common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Contract assets, current (included in prepaid expenses and other assets) Contract with Customer, Asset, after Allowance for Credit Loss, Current Accretion (amortization) of discounts (premiums) on investments Accretion (Amortization) of Discounts and Premiums, Investments Long-term investments Long-Term Investments Valuation adjustments for excess and obsolete inventory Inventory Valuation Reserves Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Concentration Risk [Table] Concentration Risk [Table] Accrued expenses and other liabilities Total accrued expenses and other liabilities Accrued Expenses And Other Current Liabilities Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, are related to services received from employees, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). This element is distinct from Accrued Liabilities Current because this element includes employee-related liabilities. Entity Address, City or Town Entity Address, City or Town Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Revenue from Contract with Customer Benchmark Revenue from Contract with Customer Benchmark [Member] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Name of Property [Axis] Name of Property [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Katy, Texas Katy, Texas [Member] Katy, Texas Concentration Risk Type [Axis] Concentration Risk Type [Axis] Desalination Desalination Segment [Member] Desalination Segment Income (Loss) Per Share Earnings Per Share, Policy [Policy Text Block] Recently Adopted and Issued Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Sublease Sublease [Member] Sublease Total other comprehensive loss, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Schedule of Accrued Expenses and Other Liabilities Schedule of Accrued Liabilities [Table Text Block] Long-term debt Long-Term Debt Ram Ramanan [Member] Ram Ramanan Income taxes Increase (Decrease) in Income Taxes Payable Document Period End Date Document Period End Date Changes in operating assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Aftermarket Aftermarket [Member] Aftermarket Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Stockholders' Equity Equity [Text Block] Security Exchange Name Security Exchange Name Treasury stock Treasury Stock, Common, Value Purchases of marketable securities Payments to Acquire Marketable Securities Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Consolidation Items [Domain] Consolidation Items [Domain] Lease liabilities Operating Lease, Liability, Current 2026 Restructuring Plan 2026 Restructuring Plan [Member] 2026 Restructuring Plan Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Income (Loss) Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Net income (loss) per share: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Total liabilities Liabilities Trading Symbol Trading Symbol Fair
Value Debt Securities, Available-for-Sale, Excluding Accrued Interest Geographical [Domain] Geographical [Domain] Capital expenditures Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Income taxes payable Accrued Income Taxes, Current Schedule of Capitalization, Equity [Line Items] Schedule of Capitalization, Equity [Line Items] Company Selected Measure Name Company Selected Measure Name Schedule of Cash, Cash Equivalents and Restricted Cash Restrictions on Cash and Cash Equivalents [Table Text Block] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Unrealized loss on investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Concentration Risk [Line Items] Concentration Risk [Line Items] Number of shares used in per share calculations: Income (Loss) Per Share Number Of Shares Used In Per Share Calculations Contract With Customer, Liability [Roll Forward] Contract With Customer, Liability [Roll Forward] Contract With Customer, Liability Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Credit Facility [Domain] Credit Facility [Domain] Share Repurchase Program Share Repurchase Program [Member] Share Repurchase Program Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Saudi Arabia SAUDI ARABIA Diluted (in shares) Diluted common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Deferred income taxes Deferred Income Taxes and Tax Credits U.S. treasury securities US Treasury Securities [Member] Restructuring provision, net of adjustments Restructuring Reserve, Accrual Adjustment JP Morgan Chase Bank, N.A. JP Morgan Chase Bank, N.A. [Member] JP Morgan Chase Bank, N.A. Investments, Fair Value Disclosure [Abstract] Investments, Fair Value Disclosure [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] 2024 Restructuring Plan 2024 Restructuring Plan [Member] 2024 Restructuring Plan Average price paid per share August 2025 (in dollars per share) Shares Acquired, Average Cost Per Share, Excluding Excise Tax Shares Acquired, Average Cost Per Share, Excluding Excise Tax Gross profit Gross Profit Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Impairment of long-lived assets Impairment of long-lived assets Long-Lived Asset, Held and Used, Impairment Loss Award Timing Predetermined Award Timing Predetermined [Flag] Treasury stock Treasury Stock, Common [Member] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Stock options and RSUs (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Restructuring accrual Restructuring Accrual, Amount Restructuring Accrual, Amount All Executive Categories All Executive Categories [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Cash received, excluding amounts recognized as revenue during the period Contract With Customer, Liability, Increase (Decrease) From Cash Receipts Contract With Customer, Liability, Increase (Decrease) From Cash Receipts Sales and marketing Selling and Marketing Expense Operating lease, right of use asset Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Segment Reporting Segment Reporting [Text Block] Investments and Fair Value Measurements Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Expiration Date Trading Arrangement Expiration Date Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Denominator (weighted average shares) Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Effect of exchange rate differences on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Financial liabilities Financial Liabilities Fair Value Disclosure Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Net proceeds from issuance of common stock Proceeds from Issuance of Common Stock Common stock, shares authorized (in shares) Common Stock, Shares Authorized Concentrations Concentration Risk Disclosure [Text Block] Exercise Price Award Exercise Price Restructuring Cost [Table] Restructuring Cost [Table] Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Stock repurchase program, authorized amount Share Repurchase Program, Authorized, Amount Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Lender Name [Axis] Lender Name [Axis] Lines of Credit Debt Disclosure [Text Block] Common stock repurchased (in shares) Treasure Stock, Shares Acquired, Common Stock Adjustment Treasure Stock, Shares Acquired, Common Stock Adjustment Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Beginning balance Ending balance Restructuring Reserve Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Adoption Date Trading Arrangement Adoption Date Contract liabilities: Contract with Customer, Liability [Abstract] Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Total other income, net Nonoperating Income (Expense) ASSETS Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accrued expenses and other liabilities, current Other Liabilities, Current [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Insider Trading Policies and Procedures [Line Items] Interest income Interest Income, Securities, Operating, Taxable Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Letter of Credit Letter of Credit [Member] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Anti-dilutive equity award shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount RSUs Restricted Stock Units (RSUs) [Member] Schedule of Antidilutive Securities Excluded from Computation of Income (Loss) Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Entity Central Index Key Entity Central Index Key All Adjustments to Compensation All Adjustments to Compensation [Member] Name of Property [Domain] Name of Property [Domain] Corporate and Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Other Other [Member] Other Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Income Taxes Income Tax, Policy [Policy Text Block] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Stockholders’ equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Operating expenses: Operating Expenses [Abstract] Deferred tax assets, net Deferred Income Tax Assets, Net Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Other accrued expenses and other liabilities Other Accrued Expenses And Current Liabilities Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy and current liabilities not separately disclosed in the balance sheet. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). City Area Code City Area Code Accumulated other comprehensive (loss) income AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Provision for (benefit from) income taxes, excluding discrete items Income Tax Expense (Benefit) Excluding Discrete Items Income Tax Expense (Benefit) Excluding Discrete Items Name Forgone Recovery, Individual Name Litigation Commitments and Contingencies, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Statement [Line Items] Statement [Line Items] Total assets Assets Megaproject Megaproject [Member] Megaproject Non-current Other Liabilities, Noncurrent [Abstract] Operating Segments Operating Segments [Member] Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] Other liabilities, non-current Other liabilities, non-current Other Liabilities, Noncurrent Goodwill Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Others Others [Member] Represents other geographic areas. Revenue recognized Contract with Customer, Liability, Revenue Recognized Subsequent Event Type [Domain] Subsequent Event Type [Domain] Retained earnings Retained Earnings [Member] Lease liabilities, non-current Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Revolving Credit Facility Revolving Credit Facility [Member] Money market securities Money Market Funds [Member] Impairment charge, right-of-use asset Operating Lease, Impairment Loss Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Common stock outstanding, Beginning balance (in shares) Common stock outstanding, Ending balance (in shares) Common Stock, Shares, Outstanding Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Unrealized loss on investments OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Award Timing Disclosures [Line Items] Corporate notes and bonds Corporate Debt Securities [Member] Diluted (in dollars per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Shares held for tax withholdings Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Prepaid and other assets Increase (Decrease) in Prepaid Expense and Other Assets Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Research and development Research and Development Expense Adjustments to reconcile net loss to cash provided by operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Revenue Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Financial Instruments [Domain] Financial Instruments [Domain] Other comprehensive loss, net of tax Other Comprehensive Income (Loss), Tax [Abstract] Schedule of Restructuring Accrual Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Revenue Revenue from Contract with Customer [Text Block] Issuance of common stock Stock Issued During Period, Value, New Issues Inventories, net Increase (Decrease) in Inventories Warranty reserve Product Warranty Accrual, Current Segment Reporting [Table] Segment Reporting [Table] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Other income (expense): Other Nonoperating Income (Expense) [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Income (loss) from operations Operating Income (Loss) Performance obligations expected to be satisfied Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Securities, Available-for-sale, Unrealized Gain (Loss) [Abstract] Debt Securities, Available-for-Sale, Unrealized Gain (Loss) [Abstract] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Impairment charge, leasehold improvements Impairment of Leasehold Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Beginning balance, common stock, issued (in shares) Ending balance, common stock issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Egypt EGYPT Finished goods Inventory, Finished Goods, Gross Beginning balance, treasury stock (in shares) Ending balance, treasury stock (in shares) Treasury Stock, Common, Shares Spain SPAIN Equity Components [Axis] Equity Components [Axis] Accounts receivable, net Increase (Decrease) in Accounts Receivable Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Termination Date Trading Arrangement Termination Date Subsequent Events [Abstract] Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Description of Business and Significant Accounting Policies Business Description and Accounting Policies [Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other assets, non-current Other Assets, Noncurrent Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Document Type Document Type Number of reportable segments separated into Number Of Reportable Segments Separated Into Number Of Reportable Segments Separated Into Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Effective tax rate, excluding discrete items Effective Income Tax Rate Reconciliation, Excluding Discrete Tax Income Tax Items, Percent Effective Income Tax Rate Reconciliation, Excluding Discrete Tax Income Tax Items, Percent Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Remaining amount under August 2025/May 2026 Authorization Share Repurchase Program, Remaining Authorized, Amount Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Work in process Inventory, Work in Process, Gross Other Financial Information Additional Financial Information Disclosure [Text Block] Contract liabilities Increase (Decrease) In Contract Liabilities Increase (Decrease) In Contract Liabilities Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (Note 7) Commitments and Contingencies Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] China CHINA Wastewater Wastewater Segment [Member] Wastewater Segment LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] February 2025 Authorization February 2025 Authorization [Member] February 2025 Authorization Inventories, net Inventories, net Inventory, Net Award Type [Domain] Award Type [Domain] Schedule of Amortized Cost and Fair Value of Available for Sale Securities Schedule Of Amortized Cost And Fair Value Of Available For Sale Securities [Table Text Block] Schedule Of Amortized Cost And Fair Value Of Available For Sale Securities [Table Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Level 3 Inputs Fair Value, Inputs, Level 3 [Member] Common stock repurchased (in shares) Number of shares purchased (in shares) Treasury Stock, Shares, Acquired Lease term (approximately) Lessee, Operating Lease, Term of Contract Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] PEO Name PEO Name Total accrued expenses, and current and non-current other liabilities Accrued Liabilities and Other Liabilities Geographical [Axis] Geographical [Axis] Total contract liabilities Contract liabilities, beginning of year Contract liabilities, end of period Contract with Customer, Liability Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Common stock repurchased Common stock repurchased Repurchases under August 2025/May 2026 Authorization Treasury Stock, Value, Acquired, Cost Method Cash paid Payments for Restructuring Cash, cash equivalents and restricted cash, beginning of year Cash, cash equivalents and restricted cash, end of period Total cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of employees terminated Restructuring and Related Cost, Number of Positions Eliminated Debt Instrument [Axis] Debt Instrument [Axis] Subsequent Event [Table] Subsequent Event [Table] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Contract assets Increase (Decrease) In Costs In Excess Of Billings On Uncompleted Contracts Or Programs1 Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings. Customer C Customer C [Member] Represents customer C. Customer [Domain] Customer [Domain] Schedule of Inventories, Net Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Earnings Per Share, Basic Raw materials Inventory, Raw Materials, Gross Repurchase of common stock Payments for Repurchase of Common Stock Contract liabilities Contract liabilities, current Contract with Customer, Liability, Current Total current assets Assets, Current Insider Trading Arrangements [Line Items] Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Utilized amount of the maximum allowable credit line Other Sundry Liabilities Amortized
Cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, after Allowance for Credit Loss Accounts receivable, net Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Restricted cash, non-current (included in other assets, non-current) Restricted Cash, Noncurrent Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common stock Common Stock [Member] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Other Financial Information [Abstract] Other Financial Information [Abstract] Other Financial Information Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Percentage of total employees terminated Restructuring and Related Cost, Number of Positions Eliminated, Period Percent Middle East Middle East [Member] Concentration risk, percentage Percentage of revenue Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and stockholders’ equity Liabilities and Equity Stock Options Share-Based Payment Arrangement, Option [Member] Capitalization, Equity [Table] Capitalization, Equity [Table] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Restructuring charges Restructuring Charges Tabular List, Table Tabular List [Table Text Block] Provision for litigation Loss Contingency Accrual, Loss (Reversal of Loss) Additional paid-in capital Additional Paid in Capital Other non-operating income (expense), net Other Nonoperating Income (Expense) Name Awards Close in Time to MNPI Disclosures, Individual Name Africa Africa [Member] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] General and administrative General and Administrative Expense Customer B Customer B [Member] Represents customer B. Adjustment to Compensation: Adjustment to Compensation [Axis] Original equipment manufacturer Original Equipment Manufacturer [Member] Original Equipment Manufacturer Share Repurchase Program [Axis] Share Repurchase Program [Axis] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Financial assets Assets, Fair Value Disclosure Committed Revolving Credit Line Committed Revolving Credit Line [Member] Information pertaining to committed revolving credit line. Cost of revenue Cost of Revenue, Excluding Inventory Write-down Cost of Revenue, Excluding Inventory Write-down Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other non-cash adjustments Other Noncash Income (Expense) Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Short-term investments Short-Term Investments Impairment of goodwill Impairment of goodwill Goodwill, Impairment Loss Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Schedule of Financial Information by Segment Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Depreciation and amortization Depreciation, Depletion and Amortization Inventories, gross Inventory, Gross May 2026 Authorization May 2026 Authorization [Member] May 2026 Authorization Refund (payment) of excise tax associated with repurchase of common stock Payments For Repurchase Of Common Stock, Excise Tax Payments For Repurchase Of Common Stock, Excise Tax Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Current assets: Assets, Current [Abstract] Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Provision for (benefit from) income taxes Provision for (benefit from) income taxes Income Tax Expense (Benefit) Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Numerator Net Income (Loss) Attributable to Parent [Abstract] Net income (loss) Net income (loss) Net (loss) income Net loss Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Location, Statement of Financial Position, Balance [Axis] Location, Statement of Financial Position, Balance [Axis] Proceeds from sales of fixed assets Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Schedule of Revenue, Remaining Performance Obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Schedule of Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]