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Related Party Transactions - Additional Information (Details) - USD ($)	1 Months Ended		12 Months Ended
	Aug. 31, 2021	May 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Property and equipment, net			$ 37,902,000	$ 11,708,000
Related party accounts receivable				$ 736,000
Restricted Stock Units RSU
Related Party Transaction [Line Items]
Equity award, granted			438,474	682,517	3,012,399
MegaChips
Related Party Transaction [Line Items]
Agreement termination date	Aug. 31, 2021
Related party accounts receivable			$ 0.0	$ 700,000
MegaChips \| Equipment
Related Party Transaction [Line Items]
Property and equipment, net				$ 100,000
MegaChips \| SiTime Corporation
Related Party Transaction [Line Items]
Percentage of outstanding common stock held			24.00%	43.70%
MegaChips Taiwan Corporation \| Equipment
Related Party Transaction [Line Items]
Property and equipment, net				$ 100,000
Akira Takata
Related Party Transaction [Line Items]
Sales consulting services fee		$ 5,000
Agreement extension date			Dec. 31, 2022
Akira Takata \| Restricted Stock Units RSU
Related Party Transaction [Line Items]
Equity award, granted		500
Equity award, vesting date		Nov. 20, 2021