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Summary of significant accounting policies - Transfer from (Details)	Mar. 31, 2022 USD ($)
FAMI
Variable Interest Entity [Line Items]
Other subsidiaries	$ 59,910
WFOE (VIE)
Variable Interest Entity [Line Items]
Consolidated VIE	3,280,144
Other subsidiaries	7,911,605
VIE and its subsidiaries
Variable Interest Entity [Line Items]
WFOE	4,567,844
Other subsidiaries	14,977,567
Other
Variable Interest Entity [Line Items]
Holding company	943,648
WFOE	3,524,104
Consolidated VIE	$ 5,601,154

X

- Definition

Amount of transfer from other.

+ References

No definition available.

+ Details

Name:	fami_TransferFromOther
Namespace Prefix:	fami_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of transfer from parent entity.

+ References

No definition available.

+ Details

Name:	fami_TransferFromParentEntity
Namespace Prefix:	fami_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of transfer from primary beneficiary of the VIE.

+ References

No definition available.

+ Details

Name:	fami_TransferFromPrimaryBeneficiaryOfVariableInterestEntity
Namespace Prefix:	fami_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of transfer from variable interest entity and subsidiaries.

+ References

No definition available.

+ Details

Name:	fami_TransferFromVariableInterestEntityAndSubsidiaries
Namespace Prefix:	fami_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=fami_VariableInterestEntityAndSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=fami_OtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: