Related Party Transactions - Additional Information (Details)	Sep. 30, 2020	Dec. 31, 2019
MegaChips \| SiTime Corporation
Related Party Transaction [Line Items]
Percentage of outstanding common stock held	44.30%	66.80%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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