XML 70 R58.htm IDEA: XBRL DOCUMENT
v3.25.3

Fair Value Measurements - Summary of fair value measurements on a recurring basis and the level of inputs (Detail) - Fair Value, Recurring [Member] - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Assets: |  |  |
Cash and cash equivalents |  | $ 352,322 | $ 56,840
Total assets |  | 1,491,258 | 366,281
Liabilities: |  |  |
Warrant liabilities |  | 1,768,232 | 70,688
Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 736,333 | 285,896
Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 402,603 | 23,545
Cash and money market funds [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents | [1] | 301,408 | 33,204
Corporate Notes And Bonds [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 3,483 | 43,868
Corporate Notes And Bonds [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  |  | 1,924
U.S. Government and Agency [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 50,914 | 23,636
U.S. Government and Agency [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 732,850 | 242,028
U.S. Government and Agency [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 402,603 | 21,621
Quoted Prices in Active Markets (Level 1) [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 301,408 | 33,204
Total assets |  | 301,408 | 33,204
Liabilities: |  |  |
Warrant liabilities |  | 86,299 | 70,688
Quoted Prices in Active Markets (Level 1) [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Quoted Prices in Active Markets (Level 1) [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Quoted Prices in Active Markets (Level 1) [Member] | Cash and money market funds [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents | [1] | 301,408 | 33,204
Quoted Prices in Active Markets (Level 1) [Member] | Corporate Notes And Bonds [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Quoted Prices in Active Markets (Level 1) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  |  | 0
Quoted Prices in Active Markets (Level 1) [Member] | U.S. Government and Agency [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 0 | 0
Quoted Prices in Active Markets (Level 1) [Member] | U.S. Government and Agency [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Quoted Prices in Active Markets (Level 1) [Member] | U.S. Government and Agency [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 50,914 | 23,636
Total assets |  | 1,189,850 | 333,077
Liabilities: |  |  |
Warrant liabilities |  | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 736,333 | 285,896
Significant Other Observable Inputs (Level 2) [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 402,603 | 23,545
Significant Other Observable Inputs (Level 2) [Member] | Cash and money market funds [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents | [1] | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes And Bonds [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 3,483 | 43,868
Significant Other Observable Inputs (Level 2) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  |  | 1,924
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government and Agency [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 50,914 | 23,636
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government and Agency [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 732,850 | 242,028
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government and Agency [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 402,603 | 21,621
Unobservable Inputs (Level 3) [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 0 | 0
Total assets |  | 0 | 0
Liabilities: |  |  |
Warrant liabilities |  | 1,681,933 | 0
Unobservable Inputs (Level 3) [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Unobservable Inputs (Level 3) [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Unobservable Inputs (Level 3) [Member] | Cash and money market funds [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents | [1] | 0 | 0
Unobservable Inputs (Level 3) [Member] | Corporate Notes And Bonds [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Unobservable Inputs (Level 3) [Member] | Corporate Notes And Bonds [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  |  | 0
Unobservable Inputs (Level 3) [Member] | U.S. Government and Agency [Member] |  |  |
Assets: |  |  |
Cash and cash equivalents |  | 0 | 0
Unobservable Inputs (Level 3) [Member] | U.S. Government and Agency [Member] | Short-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | 0 | 0
Unobservable Inputs (Level 3) [Member] | U.S. Government and Agency [Member] | Other Long-term Investments [Member] |  |  |
Assets: |  |  |
Investments |  | $ 0 | $ 0
[1] | Includes money market funds associated with the Company’s overnight investment sweep account and cash collateralizing the Company’s financial guarantees and certain other obligations.

X
- Definition Fair value portion of asset recognized for present right to economic benefit. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + 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 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-11 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E + Details
Name: | us-gaap_InvestmentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
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_InvestmentTypeAxis=us-gaap_OtherLongTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=ionq_CashAndMoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=ionq_CorporateNotesAndBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
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: |