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Customer Relationships [Member] Revenue Benchmark [Member] Incentive Stock Options [Member] Represents incentive stock options. 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Schedule of Finite-lived and Indefinite-lived Intangible Assets [Table Text Block] The tabular disclosure for finite-lived and indefinite-lived intangible assets. us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1 Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) us-gaap_AdjustmentForAmortization Amortization us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Capital expenditures UNITED STATES Non-US [Member] rfil_LesseeOperatingLeaseMonthlyRent Lessee, Operating Lease, Monthly Rent Amount of monthly rent on operating lease of the lessee. 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