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Note 6 - Acquisitions (Details) (USD $) | 12 Months Ended
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Jan. 03, 2015 | Dec. 28, 2013
Note 6 - Acquisitions (Details) [Line Items] |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | $ (129,000)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 | $ (92,000)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Other Payments to Acquire Businesses | 313,000 us-gaap_OtherPaymentsToAcquireBusinesses | 0 us-gaap_OtherPaymentsToAcquireBusinesses
BGA [Member] | Maximum [Member] |  |
Note 6 - Acquisitions (Details) [Line Items] |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | 2,700,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = rcmt_BGAMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
PCI [Member] | Maximum [Member] |  |
Note 6 - Acquisitions (Details) [Line Items] |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High | $ 2,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = rcmt_PCIMember / us-gaap_RangeAxis = us-gaap_MaximumMember |

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- 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
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Balance Type: | debit
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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition The cash outflow associated with other payments to acquire businesses including deposit on pending acquisitions and preacquisition costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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