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Note 14 - Segment Information (Details) - Revenues by Geographic Area (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Apr. 04, 2015
Mar. 29, 2014
Revenues    
Revenues $ 47,966us-gaap_Revenues $ 48,569us-gaap_Revenues
United States [Member]    
Revenues    
Revenues 36,695us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= rcmt_UnitedStatesMember		 35,809us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= rcmt_UnitedStatesMember
Canada [Member]    
Revenues    
Revenues 9,612us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= rcmt_CanadaMember		 11,485us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= rcmt_CanadaMember
Puerto Rico [Member]    
Revenues    
Revenues $ 1,659us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= rcmt_PuertoRicoMember		 $ 1,275us-gaap_Revenues
/ us-gaap_StatementGeographicalAxis
= rcmt_PuertoRicoMember