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Note 15 - Income Taxes (Details) | 3 Months Ended
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Apr. 04, 2015 | Mar. 29, 2014
Note 15 - Income Taxes (Details) [Line Items] |  |
Effective Income Tax Rate Reconciliation, Percent | 37.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 39.10%us-gaap_EffectiveIncomeTaxRateContinuingOperations
United States [Member] |  |
Note 15 - Income Taxes (Details) [Line Items] |  |
Effective Income Tax Rate Reconciliation, Percent | 41.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = rcmt_UnitedStatesMember | 41.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = rcmt_UnitedStatesMember
Canada [Member] |  |
Note 15 - Income Taxes (Details) [Line Items] |  |
Effective Income Tax Rate Reconciliation, Percent | 31.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = rcmt_CanadaMember | 34.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations / us-gaap_IncomeTaxAuthorityAxis = rcmt_CanadaMember

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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