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Label Element Value
S 000012125 [Member]  
Net Assets us-gaap_AssetsNet $ 19,864,325
Advisory Fees Paid, Amount oef_AdvisoryFeesPaidAmt $ 106,804
Holdings Count oef_HoldingsCount 30
Investment Company, Portfolio Turnover us-gaap_InvestmentCompanyPortfolioTurnover 600.00%
Diversified Company [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 1062.00%
Business Services [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 123.00%
Aerospace And Defense [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 217.00%
Computer And Peripherals [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 305.00%
Railroad [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 401.00%
Insurance Property And Casualty [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 92.00%
Computer Softwareand Services [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 1886.00%
Farm And Construction Machinery [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 243.00%
Computer Hardware [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 810.00%
Machinery [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 417.00%
Telecommunications Services [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 176.00%
Semiconductor [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 302.00%
Transportation And Logistics [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 51.00%
Health Care Plans [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 104.00%
Health Care Providers [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 84.00%
Drug [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 61.00%
Chemicals [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 127.00%
Industrial Products [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 118.00%
Home Improvement Stores [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 237.00%
Online Media [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 452.00%
Semiconductor Capital Equipment [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 851.00%
Retail Apparel And Specialty [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 417.00%
Environmental [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 493.00%
Application Software [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 476.00%
Biotechnology [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 366.00%
Mining [Member] | S 000012125 [Member]  
Percent of Net Asset Value oef_PctOfNav 74.00%
C 000033070 [Member] | S 000012125 [Member]  
Fund Name oef_FundName American Growth Fund, Inc.
Class Name oef_ClassName Class C
Trading Symbol dei_TradingSymbol AMRCX
Shareholder Report Annual or Semi-Annual oef_ShareholderReportAnnualOrSemiAnnual Semi-Annual Shareholder Report
Annual or Semi-Annual Statement [Text Block] oef_AnnlOrSemiAnnlStatementTextBlock This semi-annual shareholder report contains important information about the American Growth Fund, Inc. - Series One for the period of August 1, 2024 to January 31, 2025.
Additional Information [Text Block] oef_AddlInfoTextBlock You can find additional information about the Fund at http://www.americangrowthfund.com/agfs1/agflit_download.htm. You can also request this information by contacting us at 1-800-525-2406.
Additional Information Phone Number oef_AddlInfoPhoneNumber 1-800-525-2406
Expenses [Text Block] oef_ExpensesTextBlock WHAT WERE THE FUND'S COSTS FOR THE PAST SIX MONTHS
(based on a hypothetical $10,000 investment)
Expenses Paid, Amount oef_ExpensesPaidAmt $ 593
Expense Ratio, Percent oef_ExpenseRatioPct 586.00%
Largest Holdings [Text Block] oef_LargestHoldingsTableTextBlock WHAT FACTORS INFLUENCED PERFORMANCE?
Factors Affecting Performance [Text Block] oef_FactorsAffectingPerfTextBlock HOW DID THE FUND PERFORM FOR THESIX MONTH PEROD AND WHAT AFFECTED ITS PERFORMANCE?
Line Graph [Table Text Block] oef_LineGraphTableTextBlock HOW DID THE FUND PERFORM THE PAST 10 YEARS?
Line Graph [Table Text Block] oef_LineGraphTableTextBlock TOTAL RETURN
Average Annual Return [Table Text Block] oef_AvgAnnlRtrTableTextBlock AVERAGE ANNUAL TOTAL RETURN
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Performance quoted for the period ended 1/31/2025 represents past performance and cannot be used to predict future results
No Deduction of Taxes [Text Block] oef_NoDeductionOfTaxesTextBlock The graph and table do not reflect the reduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Additional Fund Statistics [Text Block] oef_AddlFundStatisticsTextBlock KEY FUND STATISTICS
(as of January 31, 2025)
Net Assets us-gaap_AssetsNet $ 1,476,158
Advisory Fees Paid, Amount oef_AdvisoryFeesPaidAmt $ 8,070
Investment Company, Portfolio Turnover us-gaap_InvestmentCompanyPortfolioTurnover 600.00%
C 000033067 [Member] | S 000012125 [Member]  
Fund Name oef_FundName American Growth Fund, Inc.
Class Name oef_ClassName Class D
Trading Symbol dei_TradingSymbol AMRGX
Shareholder Report Annual or Semi-Annual oef_ShareholderReportAnnualOrSemiAnnual Semi-Annual Shareholder Report
Annual or Semi-Annual Statement [Text Block] oef_AnnlOrSemiAnnlStatementTextBlock This semi-annual shareholder report contains important information about the American Growth Fund, Inc. - Series One for the period of August 1, 2024 to January 31, 2025.
Additional Information [Text Block] oef_AddlInfoTextBlock You can find additional information about the Fund at http://www.americangrowthfund.com/agfs1/agflit_download.htm. You can also request this information by contacting us at 1-800-525-2406.
Additional Information Phone Number oef_AddlInfoPhoneNumber 1-800-525-2406
Expenses [Text Block] oef_ExpensesTextBlock WHAT WERE THE FUND'S COSTS FOR THE PAST YEAR
(based on a hypothetical $10,000 investment)
Expenses Paid, Amount oef_ExpensesPaidAmt $ 457
Expense Ratio, Percent oef_ExpenseRatioPct 450.00%
Largest Holdings [Text Block] oef_LargestHoldingsTableTextBlock WHAT FACTORS INFLUENCED PERFORMANCE?
Factors Affecting Performance [Text Block] oef_FactorsAffectingPerfTextBlock HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
Line Graph [Table Text Block] oef_LineGraphTableTextBlock HOW DID THE FUND PERFORM THE PAST 10 YEARS?
Line Graph [Table Text Block] oef_LineGraphTableTextBlock TOTAL RETURN
Average Annual Return [Table Text Block] oef_AvgAnnlRtrTableTextBlock AVERAGE ANNUAL TOTAL RETURN
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Performance quoted for the period ended 1/31/2025 represents past performance and cannot be used to predict future results
No Deduction of Taxes [Text Block] oef_NoDeductionOfTaxesTextBlock The graph and table do not reflect the reduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Additional Fund Statistics [Text Block] oef_AddlFundStatisticsTextBlock KEY FUND STATISTICS
(as of January 31, 2025)
Investment Company, Portfolio Turnover us-gaap_InvestmentCompanyPortfolioTurnover 600.00%
C 000033069 [Member] | S 000012125 [Member]  
Fund Name oef_FundName American Growth Fund, Inc.
Class Name oef_ClassName Class B
Trading Symbol dei_TradingSymbol AMRBX
Shareholder Report Annual or Semi-Annual oef_ShareholderReportAnnualOrSemiAnnual Semi-Annual Shareholder Report
Annual or Semi-Annual Statement [Text Block] oef_AnnlOrSemiAnnlStatementTextBlock This semi-annual shareholder report contains important information about the American Growth Fund, Inc. - Series One for the period of August 1, 2024 to January 31, 2025.
Additional Information [Text Block] oef_AddlInfoTextBlock You can find additional information about the Fund at http://www.americangrowthfund.com/agfs1/agflit_download.htm
Additional Information Phone Number oef_AddlInfoPhoneNumber 1-800-525-2406
Expenses [Text Block] oef_ExpensesTextBlock WHAT WERE THE FUND'S COSTS FOR THE PAST SIX MONTHS
(based on a hypothetical $10,000 investment)
Expenses Paid, Amount oef_ExpensesPaidAmt $ 638
Expense Ratio, Percent oef_ExpenseRatioPct 632.00%
Largest Holdings [Text Block] oef_LargestHoldingsTableTextBlock WHAT FACTORS INFLUENCED PERFORMANCE?
Factors Affecting Performance [Text Block] oef_FactorsAffectingPerfTextBlock HOW DID THE FUND PERFORM FOR THE SIX MONTH PERIOD AND WHAT AFFECTED ITS PERFORMANCE?
Line Graph [Table Text Block] oef_LineGraphTableTextBlock TOTAL RETURN
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Performance quoted for the period ended 1/31/2025 represents past performance and cannot be used to predict future results
No Deduction of Taxes [Text Block] oef_NoDeductionOfTaxesTextBlock The graph and table do not reflect the reduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Additional Fund Statistics [Text Block] oef_AddlFundStatisticsTextBlock KEY FUND STATISTICS
(as of January 31, 2025)
Advisory Fees Paid, Amount oef_AdvisoryFeesPaidAmt $ 1,402
C 000033068 [Member] | S 000012125 [Member]  
Fund Name oef_FundName American Growth Fund, Inc.
Class Name oef_ClassName Class A
Trading Symbol dei_TradingSymbol AMRAX
Shareholder Report Annual or Semi-Annual oef_ShareholderReportAnnualOrSemiAnnual Semi-Annual Shareholder Report
Annual or Semi-Annual Statement [Text Block] oef_AnnlOrSemiAnnlStatementTextBlock This semi-annual shareholder report contains important information about the American Growth Fund, Inc. - Series One for the period of August 1, 2024 to January 31, 2025.
Additional Information [Text Block] oef_AddlInfoTextBlock You can find additional information about the Fund at http://www.americangrowthfund.com/agfs1/agflit_download.htm. You can also request this information by contacting us at 1-800-525-2406.
Additional Information Phone Number oef_AddlInfoPhoneNumber 1-800-525-2406
Expenses [Text Block] oef_ExpensesTextBlock WHAT WERE THE FUND'S COSTS FOR THE PAST SIX MONTHS
Expenses Paid, Amount oef_ExpensesPaidAmt $ 450
Expense Ratio, Percent oef_ExpenseRatioPct 4.93%
Largest Holdings [Text Block] oef_LargestHoldingsTableTextBlock HOW DID THE FUND PERFORM FOR THE SIX MONTH PERIOD AND WHAT AFFECTED ITS PERFORMANCE?
Factors Affecting Performance [Text Block] oef_FactorsAffectingPerfTextBlock WHAT FACTORS INFLUENCED PERFORMANCE?
Line Graph [Table Text Block] oef_LineGraphTableTextBlock TOTAL RETURN
Average Annual Return [Table Text Block] oef_AvgAnnlRtrTableTextBlock AVERAGE ANNUAL TOTAL RETURN
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture Performance quoted for the period ended 1/31/2025 represents past performance and cannot be used to predict future results
No Deduction of Taxes [Text Block] oef_NoDeductionOfTaxesTextBlock The graph and table do not reflect the reduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.
Additional Fund Statistics [Text Block] oef_AddlFundStatisticsTextBlock KEY FUND STATISTICS
(as of January 31, 2025)
Net Assets us-gaap_AssetsNet $ 10,207,026
Advisory Fees Paid, Amount oef_AdvisoryFeesPaidAmt $ 55,012