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

Note 9 - Segmented Information (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Jan. 01, 2017
Sales Revenue, Net [Member]
Number of Major Customers	4	2	3	2
Sales Revenue, Net [Member] \| Major Customer1 [Member]
Concentration Risk, Percentage	13.50%	22.10%	12.10%	18.20%
Sales Revenue, Net [Member] \| Major Customer2 [Member]
Concentration Risk, Percentage	11.40%	17.60%	10.30%	15.80%
Sales Revenue, Net [Member] \| Major Customer3 [Member]
Concentration Risk, Percentage	11.00%		10.10%
Sales Revenue, Net [Member] \| Major Customer 4 [Member]
Concentration Risk, Percentage	10.30%
Accounts Receivable [Member]
Concentration Risk, Percentage					11.80%
Number of Major Customers			2		1
Accounts Receivable [Member] \| Major Customer1 [Member]
Concentration Risk, Percentage			13.20%
Accounts Receivable [Member] \| Major Customer2 [Member]
Concentration Risk, Percentage			12.40%