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

Significant Accounting Policies - Additional Information (Details)

Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Cumulative opening equity adjustments	$ 41,190	$ 41,097	$ 32,301		$ 19,074
Percentage of fair value of reporting unit lesser than carrying amount	50.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Intangible asset, useful life (year)	1 year
Maximum [Member]
Significant Accounting Policies [Line Items]
Intangible asset, useful life (year)	10 years
ASC 606 \| Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Significant Accounting Policies [Line Items]
Cumulative opening equity adjustments				$ 320

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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