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v3.21.4

Advances to suppliers, net (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Supplies [Roll Forward] |  |
Beginning balance | $ 23,350,467 | $ 13,994,091
Increased during the year | 88,407,729 | 40,371,429
Less: utilized during the year | (47,418,080) | (31,256,382)
Exchange rate difference | 1,654,861 | 964,984
Sub-total | 66,718,632 | 24,074,122
Less: allowance for doubtful accounts | 0 | (723,655)
Ending balance | $ 66,718,632 | $ 23,350,467

X
- Definition Represents amount utilized form advance suppliers. + References No definition available. + Details
Name: | fami_AdvanceSuppliersUtilized
Namespace Prefix: | fami_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of doubtful accounts relating to advances to certain suppliers + References No definition available. + Details
Name: | fami_AllowanceForDoubtfulAccountsAdvancesToSuppliers
Namespace Prefix: | fami_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents exchange rate difference. + References No definition available. + Details
Name: | fami_EffectOfExchangeRateOnAdvanceToSuppliers
Namespace Prefix: | fami_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents increase in advance to suppliers. + References No definition available. + Details
Name: | fami_IncreaseInPrepaidSupplies
Namespace Prefix: | fami_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of supplies, gross. + References No definition available. + Details
Name: | fami_SuppliesGross
Namespace Prefix: | fami_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | fami_SuppliesRollForward
Namespace Prefix: | fami_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration paid in advance for supplies that provide economic benefits within a future period of one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (g)(7) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 05 -Paragraph 5 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123349782&loc=d3e5879-108316 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6787-107765 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6387103&loc=d3e6435-108320 + Details
Name: | us-gaap_Supplies
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant