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Commitment and contingency (Detail Textuals) | 12 Months Ended
--- | ---
Sep. 30, 2018 USD ($) Office_space building | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |
Number of office spaces on lease | Office_space | 1 |  |
Number of factory buildings on lease | building | 1 |  |
Rental expense | $ | $ 77,255 | $ 31,773 | $ 8,232

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- Definition Represents the number of buildings. + References No definition available. + Details
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Namespace Prefix: | fami_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The number of units (items of property) under operating lease arrangements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
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