Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 0	$ 0
Contract assets	0	0	$ 0
Contract liabilities	0	0	0
Revenue recognized from performance obligations satisfied in previous periods	0	$ 0	$ 0
Interest or penalties charged relation to unrecognized tax benefits	$ 0
Long-term Investments | Minimum
Summary Of Significant Accounting Policies [Line Items]
Remaining contractual maturities of available-for-sale-securities	more than one year
Short-term Investments | Maximum
Summary Of Significant Accounting Policies [Line Items]
Remaining contractual maturities of available-for-sale-securities	one year or less
ASU 2020-06
Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adopted date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true
Change in accounting principle, accounting standards update, early adoption [true false]	true
ASU 2019-12
Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adopted [true false]	true
Change in accounting principle, accounting standards update, adopted date	Jan. 01, 2021
Change in accounting principle, accounting standards update, immaterial effect [true false]	true