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Note 9 - Stock Options - Cash Compensation Payments (Details)	Sep. 08, 2022 USD ($)
Board Payment [Member] | Board of Directors Chairman [Member]
Compensation awarded	$ 25,000
Audit Committee Payment [Member] | Board of Directors Chairman [Member]
Compensation awarded	8,000
Audit Committee Payment [Member] | Director [Member]
Compensation awarded	5,000
Compensation Committee Payment [Member] | Board of Directors Chairman [Member]
Compensation awarded	6,000
Compensation Committee Payment [Member] | Director [Member]
Compensation awarded	5,000
Nominating and Corporate Governance Committee Payment [Member] | Board of Directors Chairman [Member]
Compensation awarded	4,000
Nominating and Corporate Governance Committee Payment [Member] | Director [Member]
Compensation awarded	4,000
Strategic Planning and Capital Allocation Committee Payment [Member] | Board of Directors Chairman [Member]
Compensation awarded	4,000
Strategic Planning and Capital Allocation Committee Payment [Member] | Director [Member]
Compensation awarded	$ 4,000

X

- Definition

The amount of compensation awarded to a nonemployee director.

+ References

No definition available.

+ Details

Name:	rfil_NonemployeeDirectorCompensationAwarded
Namespace Prefix:	rfil_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=rfil_BoardPaymentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_BoardOfDirectorsChairmanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=rfil_AuditCommitteePaymentMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=rfil_NominatingAndCorporateGovernanceCommitteePaymentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
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