XML 75 R61.htm IDEA: XBRL DOCUMENT v3.22.4

FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt securities:
Estimated Fair Value	$ 162,074	$ 173,008
Corporate debt securities
Debt securities:
Estimated Fair Value	16,892	42,133
Commercial paper
Debt securities:
Estimated Fair Value	18,922	20,743
U.S. government bonds
Debt securities:
Estimated Fair Value	105,259	86,130
Certificate of deposits
Debt securities:
Estimated Fair Value	9,986	21,507
Treasury bills
Debt securities:
Estimated Fair Value	9,516
Fair Value, Recurring
Debt securities:
Total financial assets	175,680	300,269
Fair Value, Recurring | Corporate debt securities
Debt securities:
Estimated Fair Value	16,892	42,133
Fair Value, Recurring | Commercial paper
Debt securities:
Estimated Fair Value	18,922	20,743
Fair Value, Recurring | U.S. government bonds
Debt securities:
Estimated Fair Value	105,259	86,130
Fair Value, Recurring | Certificate of deposits
Debt securities:
Estimated Fair Value	9,986	21,507
Fair Value, Recurring | Treasury bills
Debt securities:
Estimated Fair Value	9,516
Fair Value, Recurring | Agency bonds
Debt securities:
Estimated Fair Value	1,499	2,495
Fair Value, Recurring | Money market fund
Cash equivalents:
Cash equivalents	10,618	127,261
Fair Value, Recurring | Commercial paper
Cash equivalents:
Cash equivalents	2,988
Level 1 | Fair Value, Recurring
Debt securities:
Total financial assets	10,618	127,261
Level 1 | Fair Value, Recurring | Corporate debt securities
Debt securities:
Estimated Fair Value	0	0
Level 1 | Fair Value, Recurring | Commercial paper
Debt securities:
Estimated Fair Value	0	0
Level 1 | Fair Value, Recurring | U.S. government bonds
Debt securities:
Estimated Fair Value	0	0
Level 1 | Fair Value, Recurring | Certificate of deposits
Debt securities:
Estimated Fair Value	0	0
Level 1 | Fair Value, Recurring | Treasury bills
Debt securities:
Estimated Fair Value	0
Level 1 | Fair Value, Recurring | Agency bonds
Debt securities:
Estimated Fair Value	0	0
Level 1 | Fair Value, Recurring | Money market fund
Cash equivalents:
Cash equivalents	10,618	127,261
Level 1 | Fair Value, Recurring | Commercial paper
Cash equivalents:
Cash equivalents	0
Level 2 | Convertible Notes
Debt securities:
Outstanding principal	293,100
Level 2 | Fair Value, Recurring
Debt securities:
Total financial assets	165,062	173,008
Level 2 | Fair Value, Recurring | Corporate debt securities
Debt securities:
Estimated Fair Value	16,892	42,133
Level 2 | Fair Value, Recurring | Commercial paper
Debt securities:
Estimated Fair Value	18,922	20,743
Level 2 | Fair Value, Recurring | U.S. government bonds
Debt securities:
Estimated Fair Value	105,259	86,130
Level 2 | Fair Value, Recurring | Certificate of deposits
Debt securities:
Estimated Fair Value	9,986	21,507
Level 2 | Fair Value, Recurring | Treasury bills
Debt securities:
Estimated Fair Value	9,516
Level 2 | Fair Value, Recurring | Agency bonds
Debt securities:
Estimated Fair Value	1,499	2,495
Level 2 | Fair Value, Recurring | Money market fund
Cash equivalents:
Cash equivalents	0	0
Level 2 | Fair Value, Recurring | Commercial paper
Cash equivalents:
Cash equivalents	2,988
Level 3 | Fair Value, Recurring
Debt securities:
Total financial assets	0	0
Level 3 | Fair Value, Recurring | Corporate debt securities
Debt securities:
Estimated Fair Value	0	0
Level 3 | Fair Value, Recurring | Commercial paper
Debt securities:
Estimated Fair Value	0	0
Level 3 | Fair Value, Recurring | U.S. government bonds
Debt securities:
Estimated Fair Value	0	0
Level 3 | Fair Value, Recurring | Certificate of deposits
Debt securities:
Estimated Fair Value	0	0
Level 3 | Fair Value, Recurring | Treasury bills
Debt securities:
Estimated Fair Value	0
Level 3 | Fair Value, Recurring | Agency bonds
Debt securities:
Estimated Fair Value	0	0
Level 3 | Fair Value, Recurring | Money market fund
Cash equivalents:
Cash equivalents	0	$ 0
Level 3 | Fair Value, Recurring | Commercial paper
Cash equivalents:
Cash equivalents	$ 0

X

- 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)
-URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_CashEquivalentsAtCarryingValueAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

No definition available.

+ Details

Name:	us-gaap_ConvertibleDebtFairValueDisclosures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DebtSecuritiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryBondSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryBillSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CashAndCashEquivalentsAxis=us-gaap_CommercialPaperMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: