XML 73 R48.htm IDEA: XBRL DOCUMENT v3.20.4

Fair Value Measurements - Schedule of Fair Value of Company's Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Financial assets	$ 306,412	$ 142,016
Money market funds
Assets
Financial assets	59,823	13,897
U.S. government securities
Assets
Financial assets	190,677	77,400
Corporate notes
Assets
Financial assets	26,423	14,966
Commercial paper
Assets
Financial assets	29,489	35,753
Level 1
Assets
Financial assets	59,823	13,897
Level 1 | Money market funds
Assets
Financial assets	59,823	13,897
Level 1 | U.S. government securities
Assets
Financial assets	0	0
Level 1 | Corporate notes
Assets
Financial assets	0	0
Level 1 | Commercial paper
Assets
Financial assets	0	0
Level 2
Assets
Financial assets	246,589	128,119
Level 2 | Money market funds
Assets
Financial assets	0	0
Level 2 | U.S. government securities
Assets
Financial assets	190,677	77,400
Level 2 | Corporate notes
Assets
Financial assets	26,423	14,966
Level 2 | Commercial paper
Assets
Financial assets	29,489	35,753
Level 3
Assets
Financial assets	0	0
Level 3 | Money market funds
Assets
Financial assets	0	0
Level 3 | U.S. government securities
Assets
Financial assets	0	0
Level 3 | Corporate notes
Assets
Financial assets	0	0
Level 3 | Commercial paper
Assets
Financial assets	$ 0	$ 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 http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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