XML 51 R38.htm IDEA: XBRL DOCUMENT
v3.21.1

Fair Value Measurements - Summary of Financial Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Assets |  |
Short-term marketable securities | $ 33,922 | $ 49,620
Level 1 | Recurring |  |
Assets |  |
Total assets measured at fair value | 5,602 | 4,207
Level 2 | Recurring |  |
Assets |  |
Total assets measured at fair value | 48,244 | 49,620
Level 3 | Recurring |  |
Assets |  |
Total assets measured at fair value | 0 | 0
Carrying Value | Recurring |  |
Assets |  |
Total assets measured at fair value | 53,846 | 53,827
Fair Value | Recurring |  |
Assets |  |
Total assets measured at fair value | 53,846 | 53,827
Agency bonds |  |
Assets |  |
Short-term marketable securities | 26,826 |
Agency bonds | Level 1 | Recurring |  |
Assets |  |
Short-term marketable securities | 0 | 0
Agency bonds | Level 2 | Recurring |  |
Assets |  |
Short-term marketable securities | 26,826 | 35,423
Agency bonds | Level 3 | Recurring |  |
Assets |  |
Short-term marketable securities | 0 | 0
Agency bonds | Carrying Value | Recurring |  |
Assets |  |
Short-term marketable securities | 26,826 | 35,423
Agency bonds | Fair Value | Recurring |  |
Assets |  |
Short-term marketable securities | 26,826 | 35,423
Commercial paper |  |
Assets |  |
Short-term marketable securities | 7,096 |
Commercial paper | Level 1 | Recurring |  |
Assets |  |
Short-term marketable securities | 0 | 0
Commercial paper | Level 2 | Recurring |  |
Assets |  |
Short-term marketable securities | 7,096 | 14,197
Commercial paper | Level 3 | Recurring |  |
Assets |  |
Short-term marketable securities | 0 | 0
Commercial paper | Carrying Value | Recurring |  |
Assets |  |
Short-term marketable securities | 7,096 | 14,197
Commercial paper | Fair Value | Recurring |  |
Assets |  |
Short-term marketable securities | 7,096 | 14,197
Money market funds |  |
Assets |  |
Cash equivalents | 5,602 |
Money market funds | Level 1 | Recurring |  |
Assets |  |
Cash equivalents | 5,602 | 4,207
Money market funds | Level 2 | Recurring |  |
Assets |  |
Cash equivalents | 0 | 0
Money market funds | Level 3 | Recurring |  |
Assets |  |
Cash equivalents | 0 | 0
Money market funds | Carrying Value | Recurring |  |
Assets |  |
Cash equivalents | 5,602 | 4,207
Money market funds | Fair Value | Recurring |  |
Assets |  |
Cash equivalents | 5,602 | $ 4,207
Commercial paper |  |
Assets |  |
Cash equivalents | 14,322 |
Commercial paper | Level 1 | Recurring |  |
Assets |  |
Cash equivalents | 0 |
Commercial paper | Level 2 | Recurring |  |
Assets |  |
Cash equivalents | 14,322 |
Commercial paper | Level 3 | Recurring |  |
Assets |  |
Cash equivalents | 0 |
Commercial paper | Carrying Value | Recurring |  |
Assets |  |
Cash equivalents | 14,322 |
Commercial paper | Fair Value | Recurring |  |
Assets |  |
Cash equivalents | $ 14,322 |

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
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26626-111562 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent
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_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
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_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: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByMeasurementBasisAxis=us-gaap_EstimateOfFairValueFairValueDisclosureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
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_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: |