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| | <Log type="Warning"> [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 24 fact(s) appearing in ix:hidden were eligible for transformation: dei:EntityRegistrantName, rfil:BusinessCombinationConsiderationTransferredBeforePostclosingAdjustment, rfil:LesseeOperatingLeaseMonthlyRent, rfil:NonemployeeDirectorAnnualCompensation, rfil:NumberOfMajorVendors, rfil:SharePrice20DayAverage, us-gaap:AllocatedShareBasedCompensationExpense, us-gaap:FiniteLivedIntangibleAssetUsefulLife, us-gaap:NumberOfReportableSegments, us-gaap:PaymentsOfDividendsCommonStock, us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage, us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod - rfil20220731_10q.htm 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 </Log> |
| | </Logs> |
| <InputFiles> |
| | <File doctype="10-Q" original="rfil20220731_10q.htm"> rfil20220731_10q.htm </File> |
| | <File> ex_420544.htm </File> |
| | <File> ex_420545.htm </File> |
| | <File> ex_420546.htm </File> |
| | <File> ex_420547.htm </File> |
| | <File> rfil-20220731.xsd </File> |
| | <File> rfil-20220731_cal.xml </File> |
| | <File> rfil-20220731_def.xml </File> |
| | <File> rfil-20220731_lab.xml </File> |
| | <File> rfil-20220731_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies> |
| | <BaseTaxonomy items="678"> http://fasb.org/us-gaap/2022 </BaseTaxonomy> |
| | <BaseTaxonomy items="29"> http://xbrl.sec.gov/dei/2022 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |