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Fair Value Measurement (Details) - Recurring Measurements - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets and liabilities that are measured at fair value on a recurring basis
Cash equivalents	$ 32,536	$ 539,891
Level 1
Assets and liabilities that are measured at fair value on a recurring basis
Cash equivalents	32,536	539,891
Level 2
Assets and liabilities that are measured at fair value on a recurring basis
Cash equivalents	0	0
Level 3
Assets and liabilities that are measured at fair value on a recurring basis
Cash equivalents	$ 0	$ 0

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- References

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