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Note 8 - Intangible Assets (Details) - Components of Intangible Assets (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 03, 2015
Finite-Lived Intangible Assets [Line Items]  
Balance as of December 28, 2013 $ 216us-gaap_IntangibleAssetsNetExcludingGoodwill
Amortization of intangibles during the fifty-three week period ended January 3, 2015 90us-gaap_AmortizationOfIntangibleAssets
Balance 194us-gaap_IntangibleAssetsNetExcludingGoodwill
Engineering [Member] | Restricted Covenants [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles 44us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= rcmt_RestrictedCovenantsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_EngineeringMember
Engineering [Member] | Customer Relationships [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles 145us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_EngineeringMember
Engineering [Member] | PCI [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles 68us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_BusinessAcquisitionAxis
= rcmt_PCIMember
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_EngineeringMember
Engineering [Member]  
Finite-Lived Intangible Assets [Line Items]  
Balance as of December 28, 2013 179us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_EngineeringMember
Amortization of intangibles during the fifty-three week period ended January 3, 2015 58us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_EngineeringMember
Balance 189us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_EngineeringMember
Information Technology [Member] | Customer Relationships [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles 5us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_InformationTechnologyMember
Information Technology [Member]  
Finite-Lived Intangible Assets [Line Items]  
Balance as of December 28, 2013 37us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_InformationTechnologyMember
Amortization of intangibles during the fifty-three week period ended January 3, 2015 32us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_InformationTechnologyMember
Balance 5us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_StatementBusinessSegmentsAxis
= rcmt_InformationTechnologyMember
Restricted Covenants [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles 44us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= rcmt_RestrictedCovenantsMember
Customer Relationships [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles 150us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
PCI [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangibles $ 68us-gaap_FinitelivedIntangibleAssetsAcquired1
/ us-gaap_BusinessAcquisitionAxis
= rcmt_PCIMember