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v3.19.3.a.u2

Note 20 - Severance, Professional Fees and Other Charges (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018
Severance, Professional Fees and Other Charges | $ 0 | $ 1,571
Transactional Advisory Fees, Legal Fees, and Search Fees [Member] |  |
Severance, Professional Fees and Other Charges |  | 700
Former Chief Executive Officer [Member] | Severance Accrued and Related Payroll Taxes, Continuation of Certain Benefits and Professional Fees [Member] |  |
Severance, Professional Fees and Other Charges |  | $ 900

X
- Definition The amount of expense related to severance, professional fees and other charges. + References No definition available. + Details
Name: | rcmt_SeveranceProfessionalFeesAndOtherCharges
Namespace Prefix: | rcmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_NatureOfExpenseAxis=rcmt_TransactionalAdvisoryFeesLegalFeesAndSearchFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=rcmt_FormerChiefExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NatureOfExpenseAxis=rcmt_SeveranceAccruedAndRelatedPayrollTaxesContinuationOfCertainBenefitsAndProfessionalFeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |