Label	Element	Value
Liabilities Under Tax Receivable Agreement and Related Changes to Deferred Tax Assets Associated with Increases in Tax Basis	iiiv_LiabilitiesUnderTaxReceivableAgreementAndRelatedChangesToDeferredTaxAssetsAssociatedWithIncreasesInTaxBasis	$ 144,000
Limited Liability Company (LLC) Members' Equity, Unit-based Compensation	us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation	38,000
Equity Issued During Period Value Warrants Exercised	iiiv_EquityIssuedDuringPeriodValueWarrantsExercised	12,073,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	788,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	550,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	104,000
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	9,017,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	4,015,000
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	15,493,000
Net Income (Loss) Attributable to Noncontrolling Interest	us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	(1,937,000)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	60,102,000
Additional Paid-in Capital [Member]
Liabilities Under Tax Receivable Agreement and Related Changes to Deferred Tax Assets Associated with Increases in Tax Basis	iiiv_LiabilitiesUnderTaxReceivableAgreementAndRelatedChangesToDeferredTaxAssetsAssociatedWithIncreasesInTaxBasis	144,000
Limited Liability Company (LLC) Members' Equity, Unit-based Compensation	us-gaap_LimitedLiabilityCompanyLLCMembersEquityUnitBasedCompensation	38,000
Equity Issued During Period Value Warrants Exercised	iiiv_EquityIssuedDuringPeriodValueWarrantsExercised	(145,000)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	788,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	92,446,000
Stock Issued During Period, Value, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	550,000
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	804,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	4,015,000
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	(60,102,000)
Retained Earnings [Member]
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	43,726,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	736,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	(7,634,000)
Common Stock [Member]
Equity Issued During Period Value Warrants Exercised	iiiv_EquityIssuedDuringPeriodValueWarrantsExercised	12,218,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	104,000
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	(13,562,000)
Class A Common, Initial Offering [Member]
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	92,447,000
Class A Common, Initial Offering [Member] | Common Stock [Member]
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	$ 1,000
Stock Issued During Period, Shares, New Issues	us-gaap_StockIssuedDuringPeriodSharesNewIssues	7,647,500
Common Class A [Member]
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	$ (37,446,000)
Common Class A [Member] | Retained Earnings [Member]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	$ 2,522,000
Common Class A [Member] | Common Stock [Member]
Stock Issued During Period Shares Reorganization Transactions	iiiv_StockIssuedDuringPeriodSharesReorganizationTransactions	824,861
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	$ (2,522,000)
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationForfeited	7,701
Stock Issued During Period, Value, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	$ 0
Stock Issued During Period, Shares, New Issues	us-gaap_StockIssuedDuringPeriodSharesNewIssues	27,840
Common Class B [Member] | Common Stock [Member]
Stock Repurchased and Retired During Period, Shares	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares	383,417
Stock Issued During Period Shares Reorganization Transactions	iiiv_StockIssuedDuringPeriodSharesReorganizationTransactions	17,597,223
Increase (Decrease) in Stockholders Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseInStockholdersEquityDueToReorganizationTransactions	$ 2,000
Redeemable Class A Common [Member]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	552,000
Redeemable Class A Common [Member] | Retained Earnings [Member]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	552,000
Class A, Issued in Conversion [Member]
Stock Issued During Period, Value, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	8,054,000
Class A, Issued in Conversion [Member] | Additional Paid-in Capital [Member]
Stock Issued During Period, Value, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	$ 8,054,000
Class A, Issued in Conversion [Member] | Common Stock [Member]
Stock Issued During Period, Shares, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	619,542