Note 6 - Acquisitions - Maximum Deferred Consideration Payments (Details) $ in Thousands	Sep. 29, 2018 USD ($)
December 29, 2018 (after September 29, 2018)	$ 553
December 28, 2019	450
January 2, 2021	730
Estimated future contingent consideration payments	$ 1,733

Represents estimated future contingent consideration payments remainder of fiscal year.

No definition available.

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