Document and Entity Information Document Information [Table] Legal Entity [Axis] Entity [Domain] Represents the Retirement Plan Number 002. E B P 002 [Member] 401(k) Profit Sharing Plan Document Information [Line Items] Document and Entity Information Document Type Entity Registrant Name Entity Central Index Key Amendment Flag STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS EBP, Statement of Net Asset Available for Benefit [Table] Investment Type [Axis] Investments [Domain] Common Collective Trust [Member] Common/collective funds Mutual Fund [Member] Mutual funds EBP, Employer, Common Stock [Member] AmeriServ Financial, Inc. common stock Money Market Funds [Member] Money market funds/cash equivalents EBP, Statement of Net Asset Available for Benefit [Line Items] STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS EBP, Asset [Abstract] Assets EBP, Investment, Fair Value [Abstract] Investments, at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Total investments, at fair value Investment at fair value to net assets amount EBP, Investment, Excluding Plan Interest in Master Trust, Contract Value Annuity insurance contracts, at contract value EBP, Investment, Excluding Plan Interest in Master Trust, Fair and Contract Value Total investments EBP, Noninterest-Bearing Cash Cash EBP, Note Receivable from Participant Notes receivable from participants EBP, Employer Contribution, Receivable Contribution receivable from employer EBP, Participant Contribution, Receivable Contribution receivable from participants Amount of accrued interest receivable for employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Accrued Interest Receivable Accrued interest receivable EBP, Asset TOTAL ASSETS EBP, Net Asset Available for Benefit End of the Year Beginning of the Year NET ASSETS AVAILABLE FOR BENEFITS STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS EBP, Change in Net Asset Available for Benefit, Increase [Abstract] ADDITIONS TO NET ASSETS ATTRIBUTED TO: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Investment Income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Net appreciation of investment EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Total Investment Income EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest Income on Notes Receivable from Participants EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Contributions EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Contributions by participants EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Contributions by employer EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Contribution Total Contributions EBP, Change in Net Asset Available for Benefit, Increase Total Additions EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] DEDUCTIONS FROM NET ASSETS ATTRIBUTED TO: EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits Paid to Participants EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative Expenses EBP, Change in Net Asset Available for Benefit, Decrease Total Deductions EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net Increase DESCRIPTION OF PLAN EBP, Description of Plan [Table] EBP, Description of Plan [Line Items] PLAN TERMINATION EBP, Description of Plan [Text Block] DESCRIPTION OF PLAN SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES EBP, Accounting Policy [Table] EBP, Accounting Policy [Line Items] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES EBP, Summary of Accounting Policy [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES No definition available. PLAN TERMINATION EBP, Plan Termination [Text Block] PLAN TERMINATION TAX STATUS EBP, Tax Status [Table] EBP, Tax Status [Line Items] TAX STATUS EBP, Tax Status [Text Block] TAX STATUS PARTY-IN-INTEREST TRANSACTIONS EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Line Items] PARTY-IN-INTEREST TRANSACTIONS EBP, Related Party and Party-in-Interest Transactions [Text Block] PARTY-IN-INTEREST TRANSACTIONS FAIR VALUE MEASUREMENTS EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Line Items] FAIR VALUE OF FINANCIAL INSTRUMENTS FAIR VALUE MEASUREMENTS EBP, Investment, Fair Value and NAV [Text Block] FAIR VALUE MEASUREMENTS No definition available. FAIR VALUE OF FINANCIAL INSTRUMENTS The entire disclosure for fair value of financial instruments investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Fair Value Of Financial Instruments [Text Block] FAIR VALUE OF FINANCIAL INSTRUMENTS FULLY BENEFIT-RESPONSIVE INVESTMENT CONTRACT EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Line Items] FULLY BENEFIT-RESPONSIVE INVESTMENT CONTRACT EBP, Fully Benefit-Responsive Investment Contract [Text Block] FULLY BENEFIT-RESPONSIVE INVESTMENT CONTRACT RISK AND UNCERTAINTIES EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Line Items] RISK AND UNCERTAINTIES EBP, Risk and Uncertainty [Text Block] RISK AND UNCERTAINTIES SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Line Items] SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Schedule of Asset Held for Investment [Text Block] SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Basis of Accounting [Policy Text Block] Basis of Accounting EBP, Use of Estimate [Policy Text Block] Accounting Estimates EBP, Investment [Policy Text Block] Valuation of Investments and Income Recognition EBP, Note Receivable from Participant [Policy Text Block] Notes Receivable from Participants EBP, Payment to Participant [Policy Text Block] Payment of Benefits EBP, Contribution [Policy Text Block] Excess Contributions Payable EBP, Expense [Policy Text Block] Administrative Expenses EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of Plan's Assets Fair Value Hierarchy Scenario [Axis] Scenario [Domain] Represents information pertaining to non-union and union employees hired before January 1, 2013 & January 1,2014 respectively. Non Union And Union Employees Hired Before January 1, 2013 and January 1, 2024 Respectively [Member] Non-union and union employees hired before January 1, 2013 & January 1,2014 Represents information pertaining to non-union and union employees hired or rehired after January 1, 2013 & January 1,2014 respectively. Non Union And Union Employees Hired Or Rehired After January 1, 2013 and January 1, 2024 Respectively [Member] Non-union and union employees hired or rehired after January 1, 2013 & January 1,2014 EBP, Description, Available [true false] Description of plan Represents the minimum age criteria for plan eligibility under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan Minimum Age For Plan Eligibility Minimum age for Plan eligibility Represents the period used to calculate whether participants have met the minimum service requirement to qualify for benefits under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Computation Period For Minimum Service Period Number of consecutive months of service Represents the minimum service period for plan eligibility excluding discretionary employer contribution plan under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Minimum Service Period For Plan Eligibility Minimum service period for Plan eligibility Represents the minimum service period for discretionary employer contribution plan eligibility under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan Minimum Service Period For Discretionary Employer Contribution Minimum service period for discretionary employer contribution Represents information relating to non-union employees hired after December 31, 2012. Non Union Employees Hired After December 31, 2012 [Member] Non-union employees hired after December 31, 2012 Represents information relating to non-union employees hired on or before December 31, 2012. Non Union Employees Hired On Or December 31, 2012 [Member] Non-union employees hired on or before December 31, 2012 Statistical Measurement [Axis] Statistical Measurement [Domain] Minimum [Member] Minimum Maximum [Member] Maximum EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Employee contribution (in percentage) EBP, Employer Contribution, Matching Percentage Employer contribution (in percentage) EBP, Employer Contribution, Participant Compensation Matched, Percentage Percentage of participant eligible compensation Percentage of participant compensation eligible for employer non-elective contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Employer Contribution, Participant Compensation Non-Elective Contribution, Percentage Non-elective contribution, Percentage of participant eligible compensation Represents the incremental percentage that participant invests in various investments of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Employee Contribution, Incremental Percentage Increment percentage Represents the information relating to number of mutual funds in which employee contributions are invested. Employee Benefit Plan, Number Of Mutual Funds Number of Mutual Funds Represents the information relating to number of common/collective portfolios in which employee contributions are invested. Employee Benefit Plan, Number Of Common Collective Portfolios Number of common/collective portfolios Represents the information relating to number of money market/cash equivalent funds in which employee contributions are invested. Employee Benefit Plan, Number Of Money Market And Cash Equivalent Funds Number of money market/cash equivalent funds Represents the minimum service period considered for completing one full credited year of service under an employee stock purchase, savings, or similar employee benefit plan. Employee Benefit Plan, Minimum Service Period Considered For Credited Service Year Minimum service period Represents the vested percentage pursuant to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Vesting Percentage Vested percentage Represents the period of vesting. Employee Benefit Plan, Vesting Period Vesting period EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Note receivable, minimum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Note receivable, maximum borrowing amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Note receivable, maximum borrowing percentage Term of participant loan of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Note Receivable From Participant, Term Loan term EBP, Asset Held for Investment, Participant Loan, Interest Rate Interest rate for participants loans Represents the participant age requirement for withdrawal from account balance of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Participant Age For Withdrawal from Account Balance Participant age for withdrawal from account balance Maximum duration of a break in employment considered for restoring forfeited amounts, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Employee Benefit Plan, Maximum Break In Service Period Break in Service Period EBP, Forfeited Nonvested Account Forfeited nonvested accounts EBP, Forfeited Nonvested Account, Decrease from Administrative Expense Forfeiture balances utilized to pay plan expenses EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Domain] Related Party [Member] Related party EBP, Note Receivable from Participant, Allowance for Credit Loss Allowance for credit losses Amount of decrease in net asset available for benefit from payment of benefit to defaulted loan participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, withdrawal. Employee Benefit Plan, Change in Net Asset Available for Benefit, Decrease from Payment to Defaulted Participant Loans Benefit payment from the Plan EBP, Excess Contribution Payable Excess contributions payable Administrative expenses related to the employee benefit plan that are paid directly by the plan sponsor (employer) on behalf of the plan. Employee Benefit Plan Administrative Expense, Paid By Employer Payment of administrative expenses Percentage of participant account balances vested in the event of plan termination. Employee Benefit Plan, Vesting Percentage In Event Plan Termination Vesting percentage EBP, Tax Determination Letter, Obtained [true false] Determination letter obtained EBP, Tax Determination Letter, Date Determination letter date EBP, Trustee [Member] Trustee Represents information pertaining to sponsor of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Sponsor [Member] Sponsor EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Percentage Investment at fair value to net assets percentage EBP, Investment, Number of Shares Investment in shares EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Dividends income Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Total Fair Value, Inputs, Level 1 [Member] Level I Fair Value Measured at Net Asset Value Per Share [Member] Net asset value Represents information relating Federated Hermes Capital Preservation Fund. Employee Benefit Plan, Federated Hermes Capital Preservation Fund [Member] Federated Hermes Capital Preservation Fund EBP, Net Asset Value per Share or Unit Net asset value per share EBP, Fair Value, Investment, NAV, Unfunded Commitment Unfunded commitments EBP, Fair Value, Investment, NAV, Redemption, Notice Period Redemption notice period Investment, Issuer Name [Axis] Investment, Issuer Name [Domain] Pathroad Tactical Capital Appreciation & Income. Pathroad Tactical Capital Appreciation & Income [Member] Pathroad Tactical Capital Appreciation and Income Fund Pathroad Tactical Balanced Growth & Income. Pathroad Tactical Balanced Growth & Income [Member] Pathroad Tactical Balanced Growth and Income Fund EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Amount Investments held EBP, Risk and Uncertainty, Concentration of Investment, Benchmark Threshold Percentage Threshold percentage of concentration to total assets available for plan benefits Investment, Identifier [Axis] Entity Tax Identification Number Employer identification number EBP, Plan Number Plan number EBP, Asset Held for Investment, Party-in-Interest [true false] EBP, Asset Held for Investment, Party-in-Interest [true false] EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Issuer Name [Extensible Enumeration] EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value EBP, Asset Held for Investment, Participant Loan, Maturity Date Maturity date for participant loans EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Participant Loans EBP, Asset Held for Investment Total