XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.25.3

FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Financial assets and liabilities measured at fair value (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024 | Aug. 31, 2024
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | $ 9,157 |
Realized gain | $ 19 |  |
Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Money Market Funds | 269,664 | 276,374 |
Investment securities | 15,000 |  |
Prices in active markets for identical assets (Level 1) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Money Market Funds | 269,664 | 276,374 |
Significant unobservable inputs (Level 3) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities | 15,000 |  |
Commercial paper | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | 4,920 |
Commercial paper | Significant other observable inputs (Level 2) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | 4,920 |
Corporate bonds | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | 250 |
Corporate bonds | Significant other observable inputs (Level 2) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | 250 |
U.S. Treasury securities | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | 5,983 |
U.S. Treasury securities | Significant other observable inputs (Level 2) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Investment securities |  | 5,983 |
Tellutax |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | 0 | 0 |
Ecosio | Cash Earn-outs |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | 83,000 | 74,400 | $ 71,000
Ecosio | Cash Earn-outs | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | 83,000 | 74,400 |
Ecosio | Cash Earn-outs | Significant unobservable inputs (Level 3) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | 83,000 | 74,400 |
Ecosio | Stock Earn-outs |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | 23,100 | 48,100 | $ 34,000
Ecosio | Stock Earn-outs | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | 23,100 | 48,100 |
Ecosio | Stock Earn-outs | Significant unobservable inputs (Level 3) | Fair Value, Recurring |  |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis |  |  |
Contingent consideration | $ 23,100 | $ 48,100 |

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-8 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 805 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 43 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479303/805-10-55-43 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -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 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -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 5: http://www.xbrl.org/2003/role/disclosureRef -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 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479581/805-30-50-2 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of realized gain on 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 -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleRealizedGain
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount excluding accrued interest, and excluding amounts classified as cash equivalents, 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 No definition available. + Details
Name: | verx_InvestmentSecuritiesAvailableForSaleCurrentExcludingAmountsIncludedInCashEquivalents
Namespace Prefix: | verx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
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_FairValueByAssetClassAxis=us-gaap_CommercialPaperMember
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_FairValueByAssetClassAxis=us-gaap_CorporateBondSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByAssetClassAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=verx_TellutaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=verx_EcosioGmbhMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=verx_CashEarnOutMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=verx_StockEarnOutMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |