Cover [Abstract] Entity Registrant Name Entity Central Index Key Document Type Amendment Flag Current Fiscal Year End Date Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity File Number Entity Address Address Line 1 Entity Address Address Line 2 Entity Address City Or Town Entity Address Country Entity Address Postal Zip Code Condensed Consolidated Balance Sheets Statement [Table] Statement [Line Items] Class of Stock [Axis] Ordinary Shares Class A [Member] Ordinary Shares Class B [Member] Assets Current Assets Cash and restricted cash Accounts receivable, net Advances to suppliers, net Note receivable, current portion Inventories [Inventory, Net] Due from a related party Other current assets, net Total current assets [Assets, Current] Non-Current Assets Note receivable [Financing Receivable, after Allowance for Credit Loss, Noncurrent] Right-of-use assets, net Long-term investments, net [Long-Term Investments] Loan to a third party [Loan to a third party] Security deposits [Security Deposit] Property and equipment, net Total non-current assets [Assets, Noncurrent] Total Assets [Assets] Liabilities and Shareholders' Equity Current Liabilities Promissory notes [Notes Payable, Current] Accounts payable Due to related parties Operating lease liabilities - current Other current liabilities [Other Liabilities, Current] Total current liabilities [Liabilities, Current] Non-Current Liabilities Long-term loans - non-current portion Operating lease liabilities - non-current Total non-current liabilities [Liabilities, Noncurrent] Total Liabilities [Liabilities] Commitment and contingencies Shareholders' Equity Ordinary shares, value Subscription receivable Additional Paid in Capital [Additional Paid in Capital] Statutory reserve Accumulated deficits Accumulated other comprehensive loss Total Farmmi, Inc.'s shareholders' equity [Equity, Attributable to Parent] Noncontrolling interest Total Shareholders' Equity [Equity, Including Portion Attributable to Noncontrolling Interest] Total Liabilities and Shareholders' Equity [Liabilities and Equity] Class A Ordinary Shares Class B Ordinary Shares Ordinary shares, par value Ordinary share, shares authorized Ordinary share, shares issued Ordinary share, shares outstanding Unaudited Condensed Consolidated Statements of Operations and Comprehensive Loss Sales to third parties Sales to related parties Revenues [Revenues] Cost of revenues [Cost of Revenue] Gross (loss) profit [Gross Profit] Operating expenses (Allowance) reversal of allowance for credit losses Long-term investment impairment loss [Other than Temporary Impairment Losses, Investments] Selling and distribution expenses [Selling and Marketing Expense] General and administrative expenses [General and Administrative Expense] Total operating expenses [Operating Expenses] Loss from operations [Operating Income (Loss)] Other income, net Other Nonoperating Income (Expense) [Abstract] Interest income Interest expense [Interest Expense, Nonoperating] Amortization of debt issuance costs [Amortization of Debt Issuance Costs] Loss from equity method investment Other income, net Gain on disposal of subsidiaries Total other income, net [Other Nonoperating Income (Expense)] Loss before income taxes [Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest] Income tax expenses Net loss [Net Income (Loss), Including Portion Attributable to Noncontrolling Interest] Net loss attributable to non-controlling interest Net loss attributable to Farmmi, Inc. [Net Income (Loss) Attributable to Parent] Comprehensive loss Net loss [Net loss] Foreign currency translation difference Total comprehensive loss [Other Comprehensive Income (Loss), Net of Tax] Comprehensive loss attributable to non-controlling interest [Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest] Comprehensive loss attributable to Farmmi, Inc. [Comprehensive Income (Loss), Net of Tax, Attributable to Parent] Weighted average number of ordinary shares Basic Diluted Loss per ordinary share Basic [Earnings Per Share, Basic] Diluted [Earnings Per Share, Diluted] Unaudited Condensed Consolidated Statements of Changes in Shareholders Equity Statement Equity Components [Axis] Ordinary Shares Accumulated other comprehensive Income (loss) Additional Paid in Capital Additional Paid-in Capital [Member] Statutory Reserve Retained Earnings (Accumulated Deficits) Total Farmmi, Inc.'s Shareholders' Equity Noncontrolling Interest Class A Ordinary Stock Class B Ordinary Stock Subscription Receivable Balance, shares [Shares, Issued] Balance, amount Issuance of ordinary shares for promissory notes redemption, shares Issuance of ordinary shares for promissory notes redemption, amount Issuance of ordinary shares for warrants exercised, shares Issuance of ordinary shares for warrants exercised, amount Reverse share-split adjustment, shares Reverse share-split adjustment, amount Foreign currency translation loss Disposal of subsidiaries Net loss for the period Change of par value effect Issuance of ordinary shares for warrants exercised, shares [Issuance of ordinary shares for warrants exercised, shares] Issuance of ordinary shares for warrants exercised, amount [Issuance of ordinary shares for warrants exercised, amount] Reclassification of Class A shares to Class B Shares, shares Reclassification of Class A shares to Class B Shares, amount Balance, amount Balance, shares Unaudited Condensed Consolidated Statements of Cash Flows Cash flows from operating activities Net loss Adjustments to reconcile net loss to net cash (used in) provided by operating activities: Changes in allowances - accounts receivable Changes in allowances - advances to suppliers Changes in allowances - other current assets Long-term investment impairment loss Depreciation Amortization of operating lease right-of-use assets Loss on short-term investment Loss from disposal of subsidiaries Amortization of debt issuance costs Interest expenses for promissory note redemption Amortization of biological assets Changes in operating assets and liabilities: Accounts receivable, net [Increase (Decrease) in Accounts Receivable] Advances to suppliers, net [Advances to suppliers, net] Note receivable [Increase (Decrease) in Notes Receivables] Inventories, net [Increase (Decrease) in Inventories] Other current assets [Increase (Decrease) in Other Current Assets] Other non-current assets - security deposits [Increase (Decrease) in Other Noncurrent Assets] Accounts payable [Increase (Decrease) in Accounts Payable] Operating lease liabilities Other current liabilities [Increase (Decrease) in Other Current Liabilities] Net cash (used in) provided by operating activities [Cash Provided by (Used in) Operating Activity, Including Discontinued Operation] Cash flows from investing activities Purchase of property and equipment [Payments to Acquire Property, Plant, and Equipment] Proceeds from disposal of subsidiaries, net of cash Purchase of long-term investments [Payments to Acquire Long-Term Investments] Loan to a third party [Loan to a third party 1] Repayment of loan to a third party Net cash used in investing activities [Cash Provided by (Used in) Investing Activity, Including Discontinued Operation] Cash flows from financing activities Repayment of promissory notes [Repayments of Notes Payable] Borrowings from a third-party loan Repayment of a third-party loan [Repayments of Debt] Proceeds from issuance of ordinary shares for warrants exercised Due from a related party [Due from a related party] Proceeds from advances from related parties Net cash provided by financing activities [Cash Provided by (Used in) Financing Activity, Including Discontinued Operation] Effect of exchange rate changes on cash Net (decrease) increase in cash [Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation] Cash and restricted cash, beginning of period Cash and restricted cash, end of period Representing: Cash, end of period Restricted cash, end of period Total cash and restricted cash, end of period [Total cash and restricted cash, end of period] Supplemental disclosure information: Income taxes paid Interest paid Non-cash financing activities Acquisition of long-term investment through issuance of note receivable Issuance of ordinary shares for promissory notes redemption Accrued interest in promissory notes Organization and nature of business Organization and nature of business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Summary of significant accounting policies Summary of significant accounting policies Significant Accounting Policies [Text Block] Accounts receivable net Accounts receivable, net Accounts and Nontrade Receivable [Text Block] Advances to suppliers net Advances to suppliers, net [Advances to suppliers, net 1] Note receivable Note receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Inventories Inventories Inventory Disclosure [Text Block] Other current assets Other current assets Other Current Assets [Text Block] Long-term investments, net Long-term investments, net Investment [Text Block] Loan to a third party Loan to a third party Debt Disclosure [Text Block] Security deposits Security deposits [Security deposits] Property and equipment net Property and equipment, net Property, Plant and Equipment Disclosure [Text Block] Promissory notes Promissory note Other current liabilities Other current liabilities Other Liabilities Disclosure [Text Block] Long-term loan Long-term loans Shareholders Equity Shareholders' Equity Equity [Text Block] Concentration of major customers and suppliers Concentration of major customers and suppliers Concentration Risk Disclosure [Text Block] Leases Leases Lessee, Operating Leases [Text Block] Segment reporting Segment reporting Segment Reporting Disclosure [Text Block] Related party transactions Related party transactions Related Party Transactions Disclosure [Text Block] Subsequent events Subsequent events Subsequent Events [Text Block] Basis of presentation and principles of consolidation Use of estimates Cash Accounts and note receivable, net Advances to suppliers, net [Advances to suppliers, net 2] Inventories, net Inventory, Policy [Policy Text Block] Long-term investments Property and equipment, net Property, Plant and Equipment, Policy [Policy Text Block] Impairment of long-lived assets Revenue recognition Cost of revenues Cost of Goods and Service [Policy Text Block] Earnings (loss) per share Fair value of financial instruments Concentrations of credit risk Comprehensive income (loss) Leases Lessee, Leases [Policy Text Block] Foreign currency translation Shipping and handling expenses Value added tax Income taxes Statement of cash flows Risks and uncertainties Recent accounting pronouncements Schedule of the subsidiaries of FAMI Schedule of useful lives of property and equipment, net Summary of component of basic and diluted EPS Summary of antidilutive securities Schedule of accounts receivable Schedule of allowance for credit losses Schedule of advance to suppliers Schedule of advances to suppliers, net allowance for impairment loss Schedule of note receivable Schedule of inventory Schedule of other current assets Schedule of other current assets, allowance for credit losses Schedule of long-term investments, net Schedule of property, plant and equipment, stated at cost less accumulated depreciation Schedule of other current liabilities Schedule of long-term loans Schedule of warrants issued, outstanding, expired Summary of supplemental balance sheet information related to operating leases Summary of maturities of operating lease liabilities Schedule of revenue by major product categories Schedule of revenue by geographical segment Schedule of long-lived assets segment Schedule of relationship and the nature of related party transactions Schedule of due from related parties Schedule of due to related parties Schedule of operating lease from related parties Investment, Name [Axis] FAMI Farmmi International Farmmi Enterprise Farmmi Health Development Zhejiang Suyuan Agricultural Farmmi E-Commerce Suppchains Oak Suppchains Transport Farmmi Healthcare Jiangxi Xiangbo Yudu Yada Yitang Mediservice Yiting Meditech Farmmi Eco Agri Farmmi USA SuppChains Bluesage Entity Incorporation, Date of Incorporation Entity Incorporation, State Country Name Ownership Principal Activities Consolidated Entities [Axis] Related and Nonrelated Parties [Axis] Plan Name [Axis] Farmmi Supply Chain Farmmi Food and Farmmi Supply Chain SuppChains Group Inc Farmmi Biotech Guoning Zhonghao Ningbo Farmmi Trade Farmmi Canada Inc. FAMI [FAMI] Minority Interest One Net loss [Net Income (Loss) Available to Common Stockholders, Basic] Cash [Cash] Noncontrolling interest, ownership percentage by parent Noncontrolling interest, ownership percentage by parent Cash consideration Ownership percentage Long-Lived Tangible Asset [Axis] Machinery and equipment Minimum Maximum Transportation equipment Office equipment Property plant and equipment useful life Component of basic and diluted EPS Net loss available for ordinary shareholders Weighted average outstanding shares of ordinary shares basic Weighted average outstanding ordinary shares diluted Earnings per share Loss per ordinary share - basic Loss per ordinary share - diluted Warrants to purchase ordinary shares Product Or Service Axis Income Tax Authority, Name [Axis] Shipping and handling Deposit Insurance Regulation [Member] Minimum Maximum UNITED STATES [Member] Contract liabilities, current Average exchange rates Cash [Cash Equivalents, at Carrying Value] Cumulative impairment for long-term investments Impairment loss of investments Cash maintained with people's republic of china Exchange rates (per RMB1) Applicable vat rate percentage Shipping and handling expenses [Cost of Product and Service Sold] Accounts receivable Less: allowance for credit losses [Accounts Receivable, Allowance for Credit Loss, Current] Accounts receivable, net Allowance for credit losses, beginning balance (Reversal of) allowance for credit losses Translation adjustments Allowance for credit losses, ending balance Allowance for credit losses Lishui Zhelin Trading Co., Ltd Jingning Liannong Trading Co., Ltd Qingyuan Nongbang Mushroom Industry Co., Ltd Others Advances to suppliers [Advances to suppliers] Less: Allowance for doubtful accounts Advances to suppliers, net Asset Class [Axis] Advances to suppliers [Advances to suppliers 1] Allowance for credit losses, beginning balance Additions Translation adjustments Allowance for credit losses, ending balance Allowance for advances to suppliers Allowance for credit losses [Provision for Other Credit Losses] Note receivable, current portion [Note receivable, current portion] Note receivable, non-current portion Total [Financing Receivable, after Allowance for Credit Loss] Subsequent Event Type [Axis] Ewayforest Group Limited [Member] Lishui Ganglisen Enterprise Management Co., Ltd [Member] Lishui Senbo Forestry Co., Ltd [Member] Related Party [Member] Subsequent Event [Member] Equity ownership Appraised value of improvement, planting and product sales Purchase price Cash Accounts receivable [Accounts and Financing Receivable, after Allowance for Credit Loss, Current] Remaining purchase price Acquisition consideration of receivable Acquisition cash consideration Cash consideration refunded Percentage of cash consideration Repayment period Interest rate Returned percentage not less than Cash consideration amounting Accounts receivable reversal Cash consideration received Finished goods Inventory Allowance for inventory reserve Security deposits [Security deposits 1] Advances to third parties Prepaid expenses Prepaid value-added tax Sub-total Less: allowance for credit losses [Net Investment in Lease, Allowance for Credit Loss] Other current assets, net Balance as of beginning of period [Financing Receivable, Allowance for Credit Loss] Additions [Other-than-Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses] Translation adjustments [Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)] Balance as of end of period Long-term investments [Long-term investments] Less: Impairment Total Related Party Transaction [Axis] Shanghai Zhong Jian Yiting Medical Health Technology Zhejiang Yili Yuncang Technology Group Co., Ltd Equity Method Investee Twenty One Foreign exchange translation Noncontrolling interest, ownership percentage by parent Impairment for long-term investments Scenario [Axis] Scenario Forecast [Member] Loan to a third party Interest rate per annum Loan to a third party outstanding amount Repayment of loan to a third party Machinery and equipment [Member] Transportation equipment [Member] Office equipment [Member] Subtotal Accumulated depreciation [Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment] Total Depreciation expense Debt Instrument Axis Promissory notes [Member] Investor fees, costs, and other transaction expenses Description of debt instrument Interest rate [Debt Instrument, Interest Rate, Effective Percentage] Debt instrument terms Debt instrument original issue discount Amortization of debt issuance costs [Accumulated Amortization of Debt Issuance Costs, Line of Credit Arrangements] Interest expense [Interest Expense, Debt] Description of outstanding balance Pre-payment amount Repayment of debt Debt outstanding balance Promissory note minimum monthly redemption amount Promissory note maximum monthly redemption amount Ordinary shares issued for redemption Ordinary shares issued for redemption value Accrued expenses Contract liabilities Security deposits [Security Deposit Liability] Taxes payable Interest payable Salaries payable Total Legal Entity [Axis] Xinmao Group Co., Ltd. [Member] Total long-term loans - non-current portion Loan commencement date Loan maturity date Effective interest rate Xinmao Group Co Ltd [Member] Interest expenses amount Revolving loan from third party Description of repayment terms Loan amount Number of warrants outstanding, Beginning [Class of Warrant or Right, Outstanding] Number of warrants, Issued Number of warrants, Exercised [Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Exercised] Number of warrants, Expired Number of warrants outstanding, Ending Number of warrants exercisable [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number] Weighted average exercise price, Beginning [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price] Weighted average exercise price, Issued Weighted average exercise price, Exercised Weighted average exercise price, Expired Weighted average exercise price, End Weighted average exercise price exercisable Class of Warrant or Right [Axis] Warrants - Series A [Member] Number of warrants exercisable Weighted average remaining contractual life (in years) price, Outstanding, Ending balance Weighted average exercise price Award Date [Axis] Warrants - Series A Securities Purchase Agreement Warrants - Series C June 2026 [Member] Common stock shares issued Cash and cash equivalents Common stock shares designated Redemption of note Description of convened an extraordinary shareholders Statutory surplus reserve Ownership in subsidiary Statutory reserve [Statutory reserve] Description of authorized share capital of amended Issuance of ordinary shares for warrants exercised, shares [Issuance of ordinary shares for warrants exercised, shares 1] Proceeds from warrant exercises Common stock, shares issued Warrants to purchase ordinary shares [Warrants to purchase ordinary shares] Ordinary shares, par value [Ordinary shares, par value] Warrants outstanding Warrants exercise price Warrants issued Description of warrants adjustment Proceeds from issuance of warrants Customer [Axis] One Major Customer [Member] Two Major Customer [Member] One Major Supplier [Member] Two Major Supplier [Member] Three Major Supplier [Member] Four Major Supplier [Member] Five Major Supplier [Member] Total sale, percentage Total sale percentage decrease Total purchases Advances to suppliers [Advances to suppliers 2] Accounts receivable percent Supplemental balance sheet information related to operating leases Right-of-use assets under operating leases Operating lease liabilities, current Operating lease liabilities, non-current Total operating lease liabilities Maturities of operating lease liabilities For the remaining months of fiscal year 2026 2027 2028 2029 2030 Thereafter Total future minimum lease payments Less: Imputed interest [Lessee, Operating Lease, Liability, Undiscounted Excess Amount] Total Restatement Axis Supplier [Axis] Restatement adjustment ASU 2016-02 [Member] Remaining lease term Discount rate Subsegments [Axis] Special Work Orders Logistic services [Member] Operation services [Member] Corn [Member] Shiitake [Member] Mu Er [Member] Other products [Member] Revenue from contract with customer Outbound delivery services Storage services Total Concentration Risk Benchmark [Axis] Products revenue [Member] Services revenue [Member] Total revenue PRC [Member] United States of America [Member] Gross (loss) profit Total operating expenses Loss from operations Total other income (expenses), net Loss before income taxes Income tax expenses Total non-current assets Description of warehousing service business Epakia Inc [Member] Due from related parties Centurynew USA Inc [Member] Zhejiang Tantech Bamboo Technology Co., Limited [Member] Yefang Zhango [Member] Due to related parties [Due to related parties] Lease Contractual Term [Axis] Lease No 1 [Member] RMB [Member] Zhejiang Tantech Bamboo Technology Co., Limited [Member] Lease No 1 [Member] [Lease No 1 [Member]] Annual rent RMB Annual rent in USD Lease begin date Lease end date Leasing purpose Area (in square meters) Revenue from related parties Lease expenses Class A Ordinary Shares One Vote Per Share [Member] Subsequent Event [Member] Atlas Sciences LLC [Member] Gross proceeds from offering Authorized capital amount Issuances of common stock, shares Ordinary shares issued Warrants outstanding [Shares, Outstanding] Warrant exercise price Ordinary per share Warrants to purchase for shares Face amount of debt instrument Carrying amount of statutory reserve. The amount of revenue recognized from third parties. Amount of increase decrease in the valuation allowance change in accounts receivables. Amount of increase decrease in valuation allowance change in advances to suppliers. Amount of increase (decrease) of consideration paid in advance for supplies that provide economic benefits in future periods. Represent advance to suppliers. Represents the entire disclosure for advances made to suppliers. Disclosure of accounting policy for the advances to suppliers. Disclosure of accounting policy regarding detail information about value added tax. Disclosure of accounting policy for statement of cash flows. Disclosure of accounting policy regarding detail information about risks and uncertainties. It represents advance to suppliers. The tabular disclosure of supplemental balance sheet information related to operating leases. Represents information of Due to related parties.