Note 6 - Acquisitions - Maximum Deferred Consideration Payments (Details) $ in Thousands	Mar. 28, 2020 USD ($)
January 2, 2021 (after March 28, 2020)	$ 344
January 1, 2022	1,438
December 31, 2022	1,312
Estimated future contingent consideration payments	$ 3,094

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