XML 45 R35.htm IDEA: XBRL DOCUMENT
v3.22.1

Fair Values on Financial Assets and Liabilities (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair value of financial assets and liabilities |  |
Total financial assets | $ 81,662 | $ 88,340
Money market funds |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 11,187 | 7,170
Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 81,372 | 87,770
United States government agency securities | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 20,251 | 25,685
Corporate debt securities | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 47,543 | 52,560
Mortgage-backed securities | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 2,391 | 2,355
Warrant | Other Assets |  |
Fair value of financial assets and liabilities |  |
Warrants | 290 | 570
Level 1 |  |
Fair value of financial assets and liabilities |  |
Total financial assets | 11,187 | 7,170
Level 1 | Money market funds |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 11,187 | 7,170
Level 1 | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 11,187 | 7,170
Level 2 |  |
Fair value of financial assets and liabilities |  |
Total financial assets | 70,185 | 80,600
Level 2 | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 70,185 | 80,600
Level 2 | United States government agency securities | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 20,251 | 25,685
Level 2 | Corporate debt securities | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 47,543 | 52,560
Level 2 | Mortgage-backed securities | Short-term Investments |  |
Fair value of financial assets and liabilities |  |
Total short-term investments | 2,391 | 2,355
Level 3 |  |
Fair value of financial assets and liabilities |  |
Total financial assets | 290 | 570
Level 3 | Warrant | Other Assets |  |
Fair value of financial assets and liabilities |  |
Warrants | $ 290 | $ 570

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=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + 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 (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- 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 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
Name: | us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_ShortTermInvestmentsMember
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_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherAssetsMember
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: |