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Note 16 - Contingencies (Details Textual) $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($)
Estimated Litigation Liability | $ 2.9
System Partially Designed Not Operating As Intended [Member] |
Loss Contingency, Estimated Maximum Damages, Value | 3.3
Litigation Insurance Deductible | 0.5
Litigation Insurance, Maximum Coverage | $ 5.0

X
- Definition Amount of insurance deductible for litigation. + References No definition available. + Details
Name: | rcmt_LitigationInsuranceDeductible
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of maximum coverage under litigation insurance. + References No definition available. + Details
Name: | rcmt_LitigationInsuranceMaximumCoverage
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The value of estimated maximum damages. + References No definition available. + Details
Name: | rcmt_LossContingencyEstimatedMaximumDamagesValue
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LitigationReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_LitigationCaseAxis=rcmt_SystemPartiallyDesignedNotOperatingAsIntendedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |