Document And Entity Information - shares	9 Months Ended
	Oct. 02, 2021	Nov. 11, 2021
Document Information [Line Items]
Entity Central Index Key	0000700841
Entity Registrant Name	RCM TECHNOLOGIES, INC.
Amendment Flag	false
Current Fiscal Year End Date	--01-01
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 02, 2021
Document Transition Report	false
Entity File Number	1-10245
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	95-1480559
Entity Address, Address Line One	2500 McClellan Avenue, Suite 350
Entity Address, City or Town	Pennsauken
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08109-4613
City Area Code	856
Local Phone Number	356-4500
Title of 12(b) Security	Common Stock, par value $0.05 per share
Trading Symbol	RCMT
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,484,016