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Note 6 - Acquisitions (Details) - Contingent Consideration (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Jan. 03, 2015 | Dec. 28, 2013
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration balance as of | $ 930 us-gaap_BusinessCombinationContingentConsiderationLiability |
Paid in current year | (313)rcmt_BusinessCombinationContingentConsiderationPaidInCurrentYear |
Liability reduced in current year | (129)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 | (92)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Contingent consideration balance as of | 1,254 us-gaap_BusinessCombinationContingentConsiderationLiability | 930 us-gaap_BusinessCombinationContingentConsiderationLiability
Short Term [Member] | PCI [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Recorded for PCI | 261 rcmt_BusinessCombinationContingentConsiderationAdditions / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_ShortTermMember |
Short Term [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration balance as of | 523 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_ShortTermMember |
Paid in current year | (313)rcmt_BusinessCombinationContingentConsiderationPaidInCurrentYear / us-gaap_ContingentConsiderationByTypeAxis = rcmt_ShortTermMember |
Liability reduced in current year | (117)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_ContingentConsiderationByTypeAxis = rcmt_ShortTermMember |
Moved from long term to short term | 125 rcmt_BusinessCombinationContingentConsiderationMovedFromLongTermToShortTerm / us-gaap_ContingentConsiderationByTypeAxis = rcmt_ShortTermMember |
Contingent consideration balance as of | 479 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_ShortTermMember |
Long Term [Member] | PCI [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Recorded for PCI | 505 rcmt_BusinessCombinationContingentConsiderationAdditions / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_ContingentConsiderationByTypeAxis = rcmt_LongTermMember |
Long Term [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Contingent consideration balance as of | 407 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_LongTermMember |
Liability reduced in current year | (12)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_ContingentConsiderationByTypeAxis = rcmt_LongTermMember |
Moved from long term to short term | (125)rcmt_BusinessCombinationContingentConsiderationMovedFromLongTermToShortTerm / us-gaap_ContingentConsiderationByTypeAxis = rcmt_LongTermMember |
Contingent consideration balance as of | 775 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ContingentConsiderationByTypeAxis = rcmt_LongTermMember |
PCI [Member] |  |
Business Acquisition, Contingent Consideration [Line Items] |  |
Recorded for PCI | $ 766 rcmt_BusinessCombinationContingentConsiderationAdditions / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember |

X
- Definition Additional amount recorded as contingent consideration during the period. + References No definition available. + Details
Name: | rcmt_BusinessCombinationContingentConsiderationAdditions
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Business combination, contingent consideration, moved from long term to short term. + References No definition available. + Details
Name: | rcmt_BusinessCombinationContingentConsiderationMovedFromLongTermToShortTerm
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of contingent consideration paid in the current year. + References No definition available. + Details
Name: | rcmt_BusinessCombinationContingentConsiderationPaidInCurrentYear
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionContingentConsiderationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=rcmt_PCIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=rcmt_LongTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=rcmt_ShortTermMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |