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Note 15 - Contingencies (Details Textual) $ in Millions	3 Months Ended
	Jul. 02, 2022 USD ($)
Estimated Litigation Liability	$ 2.6
System Partially Designed Not Operating As Intended [Member]
Loss Contingency, Estimated Maximum Damages, Value	$ 3.3

X

- Definition

The value of estimated maximum damages.

+ References

No definition available.

+ Details

Name:	rcmt_LossContingencyEstimatedMaximumDamagesValue
Namespace Prefix:	rcmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LitigationReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	srt_LitigationCaseAxis=rcmt_SystemPartiallyDesignedNotOperatingAsIntendedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: