Note 6 - Acquisitions - Maximum Deferred Consideration Payments (Details) $ in Thousands	Mar. 30, 2019 USD ($)
December 28, 2019 (after March 30, 2019)	$ 1,355
January 2, 2021	1,478
January 1, 2022	1,744
Estimated future contingent consideration payments	$ 4,577

Represents estimated future contingent consideration payments remainder of fiscal year.

No definition available.

Name:	rcmt_EstimatedFutureContingentConsiderationPaymentsRemainderOfFiscalYear
Namespace Prefix:	rcmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant