Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Apr. 01, 2021	Jun. 27, 2020
Document Information [Line Items]
Entity Registrant Name	RCM TECHNOLOGIES, INC.
Entity Central Index Key	0000700841
Trading Symbol	rcmt
Current Fiscal Year End Date	--01-02
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding (in shares)		11,485,310
Entity Public Float			$ 9.6
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Jan. 02, 2021
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock, par value $0.05 per share