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Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets:
Money market funds, included in cash and cash equivalents	$ 5,632	$ 16,498
Fixed income mutual funds, included in short-term investments	95,686	96,397
Total	101,318	112,895
Fair Value, Inputs, Level 1
Assets:
Money market funds, included in cash and cash equivalents	5,632	16,498
Fixed income mutual funds, included in short-term investments	95,686	96,397
Total	101,318	112,895
Fair Value, Inputs, Level 2
Assets:
Money market funds, included in cash and cash equivalents	0	0
Fixed income mutual funds, included in short-term investments	0	0
Total	0	0
Fair Value, Inputs, Level 3
Assets:
Money market funds, included in cash and cash equivalents	0	0
Fixed income mutual funds, included in short-term investments	0	0
Total	$ 0	$ 0

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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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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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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