SMTC Corporation Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Segmented Information (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016	Jan. 01, 2017
Sales Revenue, Net [Member]
Number of Major Customers	2		2
Sales Revenue, Net [Member] \| Major Customer1 [Member]
Concentration Risk, Percentage	14.00%	15.60%	12.30%	15.80%
Sales Revenue, Net [Member] \| Major Customer2 [Member]
Concentration Risk, Percentage	12.80%	10.20%	11.50%	15.40%
Accounts Receivable [Member]
Number of Major Customers			1	2	1
Concentration Risk, Percentage					11.80%
Accounts Receivable [Member] \| Major Customer1 [Member]
Concentration Risk, Percentage			15.30%