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Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details) (USD $) | Apr. 04, 2015 | Jan. 03, 2015
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Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details) [Line Items] |  |
Liabilities,Net | $ 800,000 rcmt_LiabitilitiesNet | $ 2,900,000 rcmt_LiabitilitiesNet
Transit Accounts Receivable [Member] |  |
Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details) [Line Items] |  |
Accounts Receivable, Gross, Current | 4,600,000 us-gaap_AccountsReceivableGrossCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = rcmt_TransitAccountsReceivableMember | 3,800,000 us-gaap_AccountsReceivableGrossCurrent / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = rcmt_TransitAccountsReceivableMember
Disputed Purchase Order [Member] | B&M [Member] |  |
Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details) [Line Items] |  |
Contract Receivable | 4,500,000 us-gaap_AccountsReceivableBilledForLongTermContractsOrPrograms / us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis = rcmt_DisputedPurchaseOrderMember / us-gaap_CounterpartyNameAxis = rcmt_BMMember |
Transit Accounts Payable [Member] |  |
Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details) [Line Items] |  |
Accounts Payable, Current | 5,400,000 us-gaap_AccountsPayableCurrent / us-gaap_FairValueByLiabilityClassAxis = rcmt_TransitAccountsPayableMember | 6,700,000 us-gaap_AccountsPayableCurrent / us-gaap_FairValueByLiabilityClassAxis = rcmt_TransitAccountsPayableMember
B&M [Member] |  |
Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable (Details) [Line Items] |  |
Contract Receivable | $ 10,900,000 us-gaap_AccountsReceivableBilledForLongTermContractsOrPrograms / us-gaap_CounterpartyNameAxis = rcmt_BMMember |

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- Definition When transit accounts payable liabilities exceed transit account receivables,the difference between two is net liability payable in transit. + References No definition available. + Details
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Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: | rcmt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph a -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 910 -SubTopic 310 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6471494&loc=d3e49354-109356 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph c -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amounts due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold in the normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 3 -Subparagraph a, b -Article 5 + Details
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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=rcmt_TransitAccountsPayableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |