XML 49 R34.htm IDEA: XBRL DOCUMENT v3.10.0.1

Intangible assets (Parenthetical) (Detail)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Customer relationships (estimated lives 7 - 15 years)
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life		15 years
Customer relationships (estimated lives 7 - 15 years) | Maximum [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Customer relationships (estimated lives 7 - 15 years) | Minimum [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years	7 years
Patents (estimated life 14 years)
Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	14 years	14 years

X

- Definition

Intangible Assets [Line Items]

+ References

No definition available.

+ Details

Name:	rfil_IntangibleAssetsLineItems
Namespace Prefix:	rfil_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: