3.26.1 html 125 260 1 false 45 0 false 11 false false R1.htm 0000001 - Document - Cover Page Sheet http://www.gwresources.com/role/CoverPage Cover Page Cover 1 false false R2.htm 9952151 - Statement - Condensed Consolidated Balance Sheets (unaudited) Sheet http://www.gwresources.com/role/CondensedConsolidatedBalanceSheetsunaudited Condensed Consolidated Balance Sheets (unaudited) Statements 2 false false R3.htm 9952152 - Statement - Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) Sheet http://www.gwresources.com/role/CondensedConsolidatedBalanceSheetsunauditedParenthetical Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - Condensed Consolidated Statements of Operations (unaudited) Sheet http://www.gwresources.com/role/CondensedConsolidatedStatementsofOperationsunaudited Condensed Consolidated Statements of Operations (unaudited) Statements 4 false false R5.htm 9952154 - Statement - Condensed Consolidated Statements of Shareholders??? Equity (unaudited) Sheet http://www.gwresources.com/role/CondensedConsolidatedStatementsofShareholdersEquityunaudited Condensed Consolidated Statements of Shareholders??? Equity (unaudited) Statements 5 false false R6.htm 9952155 - Statement - Condensed Consolidated Statements of Shareholders??? Equity (unaudited) (Parenthetical) Sheet http://www.gwresources.com/role/CondensedConsolidatedStatementsofShareholdersEquityunauditedParenthetical Condensed Consolidated Statements of Shareholders??? Equity (unaudited) (Parenthetical) Statements 6 false false R7.htm 9952156 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited) Sheet http://www.gwresources.com/role/CondensedConsolidatedStatementsofCashFlowsunaudited Condensed Consolidated Statements of Cash Flows (unaudited) Statements 7 false false R8.htm 9952157 - Disclosure - Description of Business, Basis of Presentation, Significant Accounting Policies, and Recent Accounting Pronouncements Sheet http://www.gwresources.com/role/DescriptionofBusinessBasisofPresentationSignificantAccountingPoliciesandRecentAccountingPronouncements Description of Business, Basis of Presentation, Significant Accounting Policies, and Recent Accounting Pronouncements Notes 8 false false R9.htm 9952158 - Disclosure - Acquisitions Sheet http://www.gwresources.com/role/Acquisitions Acquisitions Notes 9 false false R10.htm 9952159 - Disclosure - Regulatory Matters Sheet http://www.gwresources.com/role/RegulatoryMatters Regulatory Matters Notes 10 false false R11.htm 9952160 - Disclosure - Revenue Recognition Sheet http://www.gwresources.com/role/RevenueRecognition Revenue Recognition Notes 11 false false R12.htm 9952161 - Disclosure - Earnings (Loss) Per Share Sheet http://www.gwresources.com/role/EarningsLossPerShare Earnings (Loss) Per Share Notes 12 false false R13.htm 9952162 - Disclosure - Prepaid Expenses and Other Current Assets Sheet http://www.gwresources.com/role/PrepaidExpensesandOtherCurrentAssets Prepaid Expenses and Other Current Assets Notes 13 false false R14.htm 9952163 - Disclosure - Equity Sheet http://www.gwresources.com/role/Equity Equity Notes 14 false false R15.htm 9952164 - Disclosure - Debt Sheet http://www.gwresources.com/role/Debt Debt Notes 15 false false R16.htm 9952165 - Disclosure - Accrued Expenses and Other Current Liabilities Sheet http://www.gwresources.com/role/AccruedExpensesandOtherCurrentLiabilities Accrued Expenses and Other Current Liabilities Notes 16 false false R17.htm 9952166 - Disclosure - Fair Value Sheet http://www.gwresources.com/role/FairValue Fair Value Notes 17 false false R18.htm 9952167 - Disclosure - Income Taxes Sheet http://www.gwresources.com/role/IncomeTaxes Income Taxes Notes 18 false false R19.htm 9952168 - Disclosure - Share-based Compensation Sheet http://www.gwresources.com/role/SharebasedCompensation Share-based Compensation Notes 19 false false R20.htm 9952169 - Disclosure - Transactions With Related Parties Sheet http://www.gwresources.com/role/TransactionsWithRelatedParties Transactions With Related Parties Notes 20 false false R21.htm 9952170 - Disclosure - Commitments and Contingencies Sheet http://www.gwresources.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 21 false false R22.htm 9952171 - Disclosure - Business Segment Information Sheet http://www.gwresources.com/role/BusinessSegmentInformation Business Segment Information Notes 22 false false R23.htm 9952172 - Disclosure - Other, Net Sheet http://www.gwresources.com/role/OtherNet Other, Net Notes 23 false false R24.htm 9952173 - Disclosure - Supplemental Cash Flow Information Sheet http://www.gwresources.com/role/SupplementalCashFlowInformation Supplemental Cash Flow Information Notes 24 false false R25.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 25 false false R26.htm 9955511 - Disclosure - Description of Business, Basis of Presentation, Significant Accounting Policies, and Recent Accounting Pronouncements (Policies) Sheet http://www.gwresources.com/role/DescriptionofBusinessBasisofPresentationSignificantAccountingPoliciesandRecentAccountingPronouncementsPolicies Description of Business, Basis of Presentation, Significant Accounting Policies, and Recent Accounting Pronouncements (Policies) Policies http://www.gwresources.com/role/DescriptionofBusinessBasisofPresentationSignificantAccountingPoliciesandRecentAccountingPronouncements 26 false false R27.htm 9955512 - Disclosure - Acquisitions (Tables) Sheet http://www.gwresources.com/role/AcquisitionsTables Acquisitions (Tables) Tables http://www.gwresources.com/role/Acquisitions 27 false false R28.htm 9955513 - Disclosure - Revenue Recognition (Tables) Sheet http://www.gwresources.com/role/RevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.gwresources.com/role/RevenueRecognition 28 false false R29.htm 9955514 - Disclosure - Earnings (Loss) Per Share (Tables) Sheet http://www.gwresources.com/role/EarningsLossPerShareTables Earnings (Loss) Per Share (Tables) Tables http://www.gwresources.com/role/EarningsLossPerShare 29 false false R30.htm 9955515 - Disclosure - Prepaid Expenses and Other Current Assets (Tables) Sheet http://www.gwresources.com/role/PrepaidExpensesandOtherCurrentAssetsTables Prepaid Expenses and Other Current Assets (Tables) Tables http://www.gwresources.com/role/PrepaidExpensesandOtherCurrentAssets 30 false false R31.htm 9955516 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables) Sheet http://www.gwresources.com/role/AccruedExpensesandOtherCurrentLiabilitiesTables Accrued Expenses and Other Current Liabilities (Tables) Tables http://www.gwresources.com/role/AccruedExpensesandOtherCurrentLiabilities 31 false false R32.htm 9955517 - Disclosure - Fair Value (Tables) Sheet http://www.gwresources.com/role/FairValueTables Fair Value (Tables) Tables http://www.gwresources.com/role/FairValue 32 false false R33.htm 9955518 - Disclosure - Share-based Compensation (Tables) Sheet http://www.gwresources.com/role/SharebasedCompensationTables Share-based Compensation (Tables) Tables http://www.gwresources.com/role/SharebasedCompensation 33 false false R34.htm 9955519 - Disclosure - Business Segment Information (Tables) Sheet http://www.gwresources.com/role/BusinessSegmentInformationTables Business Segment Information (Tables) Tables http://www.gwresources.com/role/BusinessSegmentInformation 34 false false R35.htm 9955520 - Disclosure - Other, Net (Tables) Sheet http://www.gwresources.com/role/OtherNetTables Other, Net (Tables) Tables http://www.gwresources.com/role/OtherNet 35 false false R36.htm 9955521 - Disclosure - Supplemental Cash Flow Information (Tables) Sheet http://www.gwresources.com/role/SupplementalCashFlowInformationTables Supplemental Cash Flow Information (Tables) Tables http://www.gwresources.com/role/SupplementalCashFlowInformation 36 false false R37.htm 9955522 - Disclosure - Acquisitions - Narrative (Details) Sheet http://www.gwresources.com/role/AcquisitionsNarrativeDetails Acquisitions - Narrative (Details) Details 37 false false R38.htm 9955523 - Disclosure - Acquisitions - Recognized Identified Assets Acquired and Liabilities Assumed (Details) Sheet http://www.gwresources.com/role/AcquisitionsRecognizedIdentifiedAssetsAcquiredandLiabilitiesAssumedDetails Acquisitions - Recognized Identified Assets Acquired and Liabilities Assumed (Details) Details 38 false false R39.htm 9955524 - Disclosure - Regulatory Matters (Details) Sheet http://www.gwresources.com/role/RegulatoryMattersDetails Regulatory Matters (Details) Details http://www.gwresources.com/role/RegulatoryMatters 39 false false R40.htm 9955525 - Disclosure - Revenue Recognition - Disaggregation of Revenue (Details) Sheet http://www.gwresources.com/role/RevenueRecognitionDisaggregationofRevenueDetails Revenue Recognition - Disaggregation of Revenue (Details) Details 40 false false R41.htm 9955526 - Disclosure - Revenue Recognition - Contract Assets and Liabilities (Details) Sheet http://www.gwresources.com/role/RevenueRecognitionContractAssetsandLiabilitiesDetails Revenue Recognition - Contract Assets and Liabilities (Details) Details 41 false false R42.htm 9955527 - Disclosure - Revenue Recognition - Accounts Receivable (Details) Sheet http://www.gwresources.com/role/RevenueRecognitionAccountsReceivableDetails Revenue Recognition - Accounts Receivable (Details) Details 42 false false R43.htm 9955528 - Disclosure - Revenue Recognition - Allowance for Doubtful Accounts Activity (Details) Sheet http://www.gwresources.com/role/RevenueRecognitionAllowanceforDoubtfulAccountsActivityDetails Revenue Recognition - Allowance for Doubtful Accounts Activity (Details) Details 43 false false R44.htm 9955529 - Disclosure - Revenue Recognition - Deferred Revenue - ICFA (Details) Sheet http://www.gwresources.com/role/RevenueRecognitionDeferredRevenueICFADetails Revenue Recognition - Deferred Revenue - ICFA (Details) Details 44 false false R45.htm 9955530 - Disclosure - Earnings (Loss) Per Share (Details) Sheet http://www.gwresources.com/role/EarningsLossPerShareDetails Earnings (Loss) Per Share (Details) Details http://www.gwresources.com/role/EarningsLossPerShareTables 45 false false R46.htm 9955531 - Disclosure - Prepaid Expenses and Other Current Assets (Details) Sheet http://www.gwresources.com/role/PrepaidExpensesandOtherCurrentAssetsDetails Prepaid Expenses and Other Current Assets (Details) Details http://www.gwresources.com/role/PrepaidExpensesandOtherCurrentAssetsTables 46 false false R47.htm 9955532 - Disclosure - Equity (Details) Sheet http://www.gwresources.com/role/EquityDetails Equity (Details) Details http://www.gwresources.com/role/Equity 47 false false R48.htm 9955533 - Disclosure - Debt (Details) Sheet http://www.gwresources.com/role/DebtDetails Debt (Details) Details http://www.gwresources.com/role/Debt 48 false false R49.htm 9955534 - Disclosure - Accrued Expenses and Other Current Liabilities (Details) Sheet http://www.gwresources.com/role/AccruedExpensesandOtherCurrentLiabilitiesDetails Accrued Expenses and Other Current Liabilities (Details) Details http://www.gwresources.com/role/AccruedExpensesandOtherCurrentLiabilitiesTables 49 false false R50.htm 9955535 - Disclosure - Fair Value - Fair Value of Financial Instruments (Details) Sheet http://www.gwresources.com/role/FairValueFairValueofFinancialInstrumentsDetails Fair Value - Fair Value of Financial Instruments (Details) Details 50 false false R51.htm 9955536 - Disclosure - Fair Value - Carrying Amount and Estimated Fair Values (Details) Sheet http://www.gwresources.com/role/FairValueCarryingAmountandEstimatedFairValuesDetails Fair Value - Carrying Amount and Estimated Fair Values (Details) Details 51 false false R52.htm 9955537 - Disclosure - Income Taxes (Details) Sheet http://www.gwresources.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.gwresources.com/role/IncomeTaxes 52 false false R53.htm 9955538 - Disclosure - Share-based Compensation - Share-Based Compensation, Employees and Non-employees (Details) Sheet http://www.gwresources.com/role/SharebasedCompensationShareBasedCompensationEmployeesandNonemployeesDetails Share-based Compensation - Share-Based Compensation, Employees and Non-employees (Details) Details 53 false false R54.htm 9955539 - Disclosure - Transactions With Related Parties (Details) Sheet http://www.gwresources.com/role/TransactionsWithRelatedPartiesDetails Transactions With Related Parties (Details) Details http://www.gwresources.com/role/TransactionsWithRelatedParties 54 false false R55.htm 9955540 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.gwresources.com/role/CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://www.gwresources.com/role/CommitmentsandContingencies 55 false false R56.htm 9955541 - Disclosure - Business Segment Information - Narrative (Details) Sheet http://www.gwresources.com/role/BusinessSegmentInformationNarrativeDetails Business Segment Information - Narrative (Details) Details 56 false false R57.htm 9955542 - Disclosure - Business Segment Information - Significant Expense (Details) Sheet http://www.gwresources.com/role/BusinessSegmentInformationSignificantExpenseDetails Business Segment Information - Significant Expense (Details) Details 57 false false R58.htm 9955543 - Disclosure - Other, Net (Details) Sheet http://www.gwresources.com/role/OtherNetDetails Other, Net (Details) Details http://www.gwresources.com/role/OtherNetTables 58 false false R59.htm 9955544 - Disclosure - Supplemental Cash Flow Information (Details) Sheet http://www.gwresources.com/role/SupplementalCashFlowInformationDetails Supplemental Cash Flow Information (Details) Details http://www.gwresources.com/role/SupplementalCashFlowInformationTables 59 false false All Reports Book All Reports gwrs-20260331.htm gwrs-20260331.xsd gwrs-20260331_cal.xml gwrs-20260331_def.xml gwrs-20260331_lab.xml gwrs-20260331_pre.xml gwrs-20260331_g1.jpg http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 true true