XML 50 R38.htm IDEA: XBRL DOCUMENT v3.21.1

Noncurrent Assets Held for Sale (Tables)

12 Months Ended

Dec. 31, 2020

Discontinued Operations and Disposal Groups [Abstract]

Summary of Noncurrent Assets Held for Sale

		December 31
		2019				2020
		US$				US$
Assets held for sale			10,405				11,124
			10,405				11,124

X

- Definition

Summary of non current assets held for sale.

+ References

No definition available.

+ Details

Name:	simo_SummaryOfNonCurrentAssetsHeldForSaleTableTextBlock
Namespace Prefix:	simo_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration