SMTC Corporation Annual report pursuant to Section 13 and 15(d)

Note 16 - Acquisition of MC Assembly - Intangible Assets and Useful Lives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
Customer relationships	$ 12,747	$ 19,935
Customer Relationships [Member]
Customer relationships (Year)	10 years
Order or Production Backlog [Member]
Customer relationships (Year)	1 year 182 days
Trade Names [Member]
Customer relationships (Year)	1 year
Noncompete Agreements [Member]
Customer relationships (Year)	2 years
MC Assembly [Member]
Customer relationships		21,000
MC Assembly [Member] \| Customer Relationships [Member]
Customer relationships		$ 12,350
Customer relationships (Year)		10 years
MC Assembly [Member] \| Order or Production Backlog [Member]
Customer relationships		$ 6,990
Customer relationships (Year)		1 year 182 days
MC Assembly [Member] \| Trade Names [Member]
Customer relationships		$ 1,300
Customer relationships (Year)		1 year
MC Assembly [Member] \| Noncompete Agreements [Member]
Customer relationships		$ 360
Customer relationships (Year)		2 years