The Company and Basis of Presentation - Additional Information (Details) - USD ($) $ in Millions	Feb. 22, 2021	Jun. 16, 2020	Jun. 30, 2021
Follow-on Public Offering
Significant Accounting Policies [Line Items]
Proceeds from public offering, net of underwriting discounts and commissions	$ 181.6	$ 45.8
Payments for underwriting discounts and commissions	8.6	2.7
Deferred offering costs	$ 0.3	$ 0.3
Si Time Corporation | Follow-on Public Offering
Significant Accounting Policies [Line Items]
Issuance of common stock upon follow-on public offering net of underwriting discounts and commissions and deferred offerings costs, Shares	1,500,000	1,525,000
MegaChips | Follow-on Public Offering
Significant Accounting Policies [Line Items]
Issuance of common stock upon follow-on public offering net of underwriting discounts and commissions and deferred offerings costs, Shares	1,500,000	2,500,000
MegaChips | Si Time Corporation
Significant Accounting Policies [Line Items]
Percentage of outstanding common stock held			31.50%