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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	Feb. 22, 2021	Jun. 16, 2020	Jun. 30, 2021	Dec. 31, 2020	Aug. 04, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued expenses and other current liabilities			$ 13,807	$ 12,963	$ 1,300
Restricted Stock Units RSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs			72,600
Liability-based Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation costs			$ 500
Unrecognized compensation cost is expected weighted average period			4 months 24 days
Equity Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost is expected weighted average period			3 years 6 months
New Hires \| Cash Restricted Stock Unit Award CRSU
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			1 year
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage actual payouts			76.00%		119.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage actual payouts			141.00%		144.00%
Si Time Corporation \| Follow-on Public Offering
Share Based Compensation Arrangement By Share Based Payment Award [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
Share Based Compensation Arrangement By Share Based Payment Award [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
MegaChips \| Si Time Corporation \| Follow-on Public Offering
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued price per share	$ 127