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Note 6 - Acquisitions (Details) - Maximum Deferred Consideration Payments (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	$ 1,254us-gaap_BusinessCombinationContingentConsiderationLiability	$ 930us-gaap_BusinessCombinationContingentConsiderationLiability
January 3, 2015 [Member] | BGA [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	217us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_BGAMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_January32015Member
January 3, 2015 [Member] | PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	262us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_January32015Member
January 3, 2015 [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	479us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_January32015Member
December 31, 2016 [Member] | BGA [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	271us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_BGAMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_December312016Member
December 31, 2016 [Member] | PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	197us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_December312016Member
December 31, 2016 [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	468us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_December312016Member
December 30, 2017 [Member] | PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	307us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_December302017Member
December 30, 2017 [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	307us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_December302017Member
Estimated Future Payments [Member] | BGA [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	488us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_BGAMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_EstimatedFuturePaymentsMember
Estimated Future Payments [Member] | PCI [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	766us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_EstimatedFuturePaymentsMember
Estimated Future Payments [Member]
Business Acquisition, Contingent Consideration [Line Items]
Estimated contingent consideration payments	$ 1,254us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_EstimatedFuturePaymentsMember

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478

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