Annual report pursuant to Section 13 and 15(d)

Document And Entity Information

Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Jan. 03, 2021
Mar. 17, 2021
Jun. 28, 2020
Cover [Abstract]      
Document Type 10-K    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Central Index Key 0001108320    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Jan. 03, 2021    
Document Fiscal Year Focus 2020    
Current Fiscal Year End Date --01-03    
Entity File Number 0-31051    
Entity Registrant Name SMTC CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 98-0197680    
Entity Address, Address Line One 7050 Woodbine Ave, Suite 300    
Entity Address, State or Province ON    
Entity Address, City or Town Markham    
Entity Address, Country CA    
Entity Address, Postal Zip Code L3R 4G8    
City Area Code 905    
Local Phone Number 479-1810    
Title of 12(b) Security Common stock, par value $0.01 per share    
Trading Symbol SMTX    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 62.8
Entity Common Stock, Shares Outstanding (in shares)   28,513,810  
Documents Incorporated by Reference

Documents Incorporated By Reference: None.