Label	Element	Value
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	3,792,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	92,447,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	104,000
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
Stock Issued During Period, Value, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	8,054,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	38,000
Equity Issued During Period, Value, Warrants Exercised	iiiv_EquityIssuedDuringPeriodValueWarrantsExercised	12,102,000
Noncontrolling Interest [Member]
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	60,102,000
Increase (Decrease) in Stockholders' Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseinStockholdersEquityduetoReorganizationTransactions	15,493,000
Net Income (Loss) Attributable to Noncontrolling Interest	us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	91,000
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseinStockholdersEquityduetoReorganizationTransactions	43,726,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	(98,000)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	us-gaap_ProfitLoss	(7,634,000)
Additional Paid-in Capital [Member]
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	(60,102,000)
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	3,792,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	92,446,000
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
Stock Issued During Period, Value, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	8,054,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	38,000
Equity Issued During Period, Value, Warrants Exercised	iiiv_EquityIssuedDuringPeriodValueWarrantsExercised	(116,000)
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity due to Reorganization Transactions	iiiv_IncreaseDecreaseinStockholdersEquityduetoReorganizationTransactions	(13,562,000)
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	104,000
Equity Issued During Period, Value, Warrants Exercised	iiiv_EquityIssuedDuringPeriodValueWarrantsExercised	12,218,000
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
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	$ 1,000
Stock Issued During Period, Shares, Conversion of Convertible Securities	us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	619,542
Stock Issued During Period, Shares, New Issues	us-gaap_StockIssuedDuringPeriodSharesNewIssues	7,647,500
Common Class B [Member] | Common Stock [Member]
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
Stock Repurchased and Retired During Period, Shares	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares	383,417
Redeemable Class A Common [Member] | Retained Earnings [Member]
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared	us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared	$ 552,000