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Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value Of Financial Instruments [Line Items]
Cash and cash equivalents	$ 247,833	$ 67,005
Restricted cash	158	158
Short-term investments	28,962
Long-term investments	1,480
Money Market Funds
Fair Value Of Financial Instruments [Line Items]
Cash and cash equivalents	247,800	67,000
Restricted cash	$ 200	$ 200

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- Definition

Fair value of financial instruments.

+ References

No definition available.

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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

+ References

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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