XML 43 R31.htm IDEA: XBRL DOCUMENT
v3.21.2

Fair Value Measurements - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Total available for sale investments | $ 129,470 |
Liabilities: |  |
Derivative financial instruments - warrants | 17 | $ 285
Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 1,740 |
Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 87,678 |
Commercial paper |  |
Assets: |  |
Total available for sale investments | 12,782 |
Non U.S. government |  |
Assets: |  |
Total available for sale investments | 737 |
U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 26,533 |
Recurring basis |  |
Assets: |  |
Total included in cash and cash equivalents | 9,596 |
Total available for sale investments | 129,470 |
Total assets measured at fair value on a recurring basis | 139,066 | 129,988
Liabilities: |  |
Derivative financial instruments - warrants | 17 | 285
Total liabilities measured at fair value on a recurring basis | 17 | 285
Recurring basis | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 1,740 |
Recurring basis | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 87,678 |
Recurring basis | Commercial paper |  |
Assets: |  |
Total available for sale investments | 12,782 |
Recurring basis | Non U.S. government |  |
Assets: |  |
Total available for sale investments | 737 |
Recurring basis | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 26,533 |
Recurring basis | Money Market Funds |  |
Assets: |  |
Total included in cash and cash equivalents | 9,596 | 129,988
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  |
Assets: |  |
Total included in cash and cash equivalents | 9,596 |
Total available for sale investments | 0 |
Total assets measured at fair value on a recurring basis | 9,596 | 129,988
Liabilities: |  |
Derivative financial instruments - warrants | 0 | 0
Total liabilities measured at fair value on a recurring basis | 0 | 0
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Commercial paper |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Non U.S. government |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Money Market Funds |  |
Assets: |  |
Total included in cash and cash equivalents | 9,596 | 129,988
Recurring basis | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Total included in cash and cash equivalents | 0 |
Total available for sale investments | 129,470 |
Total assets measured at fair value on a recurring basis | 129,470 | 0
Liabilities: |  |
Derivative financial instruments - warrants | 0 | 0
Total liabilities measured at fair value on a recurring basis | 0 | 0
Recurring basis | Significant Other Observable Inputs (Level 2) | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 1,740 |
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 87,678 |
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial paper |  |
Assets: |  |
Total available for sale investments | 12,782 |
Recurring basis | Significant Other Observable Inputs (Level 2) | Non U.S. government |  |
Assets: |  |
Total available for sale investments | 737 |
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 26,533 |
Recurring basis | Significant Other Observable Inputs (Level 2) | Money Market Funds |  |
Assets: |  |
Total included in cash and cash equivalents | 0 | 0
Recurring basis | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Total included in cash and cash equivalents | 0 |
Total available for sale investments | 0 |
Total assets measured at fair value on a recurring basis | 0 | 0
Liabilities: |  |
Derivative financial instruments - warrants | 17 | 285
Total liabilities measured at fair value on a recurring basis | 17 | 285
Recurring basis | Significant Unobservable Inputs (Level 3) | Certificate of deposit |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Significant Unobservable Inputs (Level 3) | Corporate debt securities |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Significant Unobservable Inputs (Level 3) | Commercial paper |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Significant Unobservable Inputs (Level 3) | Non U.S. government |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Significant Unobservable Inputs (Level 3) | U.S. treasury securities |  |
Assets: |  |
Total available for sale investments | 0 |
Recurring basis | Significant Unobservable Inputs (Level 3) | Money Market Funds |  |
Assets: |  |
Total included in cash and cash equivalents | $ 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
- 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 http://asc.fasb.org/extlink&oid=120398452&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 http://asc.fasb.org/extlink&oid=121558606&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 http://asc.fasb.org/extlink&oid=121553693&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 http://asc.fasb.org/extlink&oid=121645371&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
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of financial and nonfinancial obligations. + 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_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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_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_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
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_CashAndCashEquivalentsAxis=us-gaap_MoneyMarketFundsMember
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: |