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Note 4 - Accounts Receivable and Contract Assets, Net - Activity in Provision for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2026	Dec. 28, 2024
Balance at beginning of year	$ 1,570	$ 1,600
Increase in provision for credit losses	906	0
Write-offs of receivables to provision for credit losses	(1,247)	(30)
Balance at end of year	$ 1,229	$ 1,570

X

- Definition

Amount of expense related to estimated loss from accounts receivable and contract assets.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of increase (decrease) in allowance for credit loss on accounts receivable and contract assets.

+ References

No definition available.

+ Details

Name:	rcmt_ProvisionForCreditLossAccountsReceivableAndContractAssetsPeriodIncreaseDecrease
Namespace Prefix:	rcmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of direct write-downs of accounts receivable charged against the allowance.

+ References

No definition available.

+ Details

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