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Note 15 - Contingencies (Details Textual) - USD ($) $ in Millions |  | 1 Months Ended |
--- | --- | --- | ---
Apr. 30, 2022 | Apr. 30, 2022 | Mar. 29, 2025
Estimated Litigation Liability |  |  | $ 2.8
System Partially Designed Not Operating As Intended [Member] |  |  |
Estimated Litigation Liability | $ 0.5 | $ 0.5 |
Loss Contingency, Estimated Maximum Damages, Value |  | 3.3 |
Litigation Insurance Deductible | 0.5 | 0.5 |
Litigation Insurance, Maximum Coverage | 5.0 | $ 5.0 |
System Partially Designed Not Operating As Intended [Member] | Minimum [Member] |  |  |
Loss Contingency, Damages Sought, Value | $ 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 -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(25)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_LitigationReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483076/450-20-50-9 + Details
Name: | us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=rcmt_SystemPartiallyDesignedNotOperatingAsIntendedMember
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: |