Document And Entity Information
Dividend yield
Note To Financial Statement Details Textual
Identifiable intangible assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Significant Accounting Policies
Note 2 - Summary of Significant Accounting Policies
Note 3 - Acquisition
Risk-free interest rate
Note 4 - Fair Value Measurements
Note 5 - Goodwill and Intangible Assets
Note 6 - Revenue From Contracts With Customers
Note 8 - Inventories
Note 9 - Leases
Note 10 - Debt
Trade accounts receivable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Note 11 - Stock-based Compensation Plan
Other current assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
Note 14 - Segment Information
Cash
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
Note 2 - Summary of Significant Accounting Policies - Weighted Average Common Shares (Details)
us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
Business Combination, Contingent Consideration, Liability, Current
Note 3 - Acquisition - Acquired assets and Liabilities Assumed (Details)
Inventories
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
intt_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour
Thereafter
Amount of lessee's undiscounted obligation for lease payment for operating lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).
Expected common stock market price volatility factor
Note 3 - Acquisition - Intangible Assets (Details)
us-gaap_LiabilitiesCurrent
Total current liabilities
Automobile Leases [Member]
Information pertaining to automobile leases.
Schedule of Maturities of Long-Term Debt [Table Text Block]
Note 3 - Acquisition - Proforma Information (Details)
Note 4 - Fair Value Measurements - Liabilities Measured at Fair Value on Recurring Basis (Details)
Note 4 - Fair Value Measurements - Changes in the Fair Value of Level 3 Contingent Consideration Liabilities (Details)
Note 5 - Goodwill and Intangible Assets - Changes in Goodwill (Details)
Weighted average expected life of stock options (years) (Year)
Other current liabilities
us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable
Note 5 - Goodwill and Intangible Assets - Intangible Assets (Details)
Note 5 - Goodwill and Intangible Assets - Changes in the Amount of the Carrying Value of Indefinite-lived Intangible Assets (Details)
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Note 5 - Goodwill and Intangible Assets - Changes in the Amount of the Carrying Value of Intangible Assets (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Note 5 - Goodwill and Intangible Assets - Future Amortization Expense (Details)
Finite-lived intangible assets
Acquisition of Alfamation
Note 6 - Revenue From Contracts With Customers - Disaggregation of Revenues (Details)
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 8 - Inventories - Inventories (Details)
Useful life (Year)
Note 9 - Leases - Lease Costs (Details)
Note 9 - Leases - Maturities of Lease Liabilities (Details)
Note 10 - Debt - Outstanding Letters of Credit (Details)
Note 10 - Debt - Future Maturities of Long-term Debt (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Indefinite-lived intangible assets
Acquisition of Alfamation
Note 11 - Stock-based Compensation Plan - Allocation of Share-based Compensation Expense (Details)
Note 11 - Stock-based Compensation Plan - Stock Options Valuation Assumptions (Details)
Note 11 - Stock-based Compensation Plan - Stock Option Activity (Details)
Granted, weighted average exercise price (in dollars per share)
us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Foreign currency translation adjustments
Note 11 - Stock-based Compensation Plan - Stock Option Activity (Details) (Parentheticals)
Vested, weighted average exercise price (in dollars per share)
Note 11 - Stock-based Compensation Plan - Unvested Stock Activity (Details)
Forfeited, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Unvested shares outstanding, weighted average exercise price (in dollars per share)
Unvested shares outstanding, weighted average exercise price (in dollars per share)
Note 14 - Segment Information - Segment Information (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited, number of shares (in shares)
Note 14 - Segment Information - Identifiable Assets (Details)
Note 14 - Segment Information - Net Revenue From Unaffiliated Customers (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Unvested shares outstanding (in shares)
Unvested shares outstanding (in shares)
Note 14 - Segment Information - Long-lived Assets by Geographical Area (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Granted, number of shares (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)
Vested, number of shares (in shares)
Diluted earnings per share (in dollars per share)
us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted
Nonvested Restricted Stock Shares Activity [Table Text Block]
Current portion of Term Note and other long-term debt
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number (in shares)
Net earnings
us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Business Acquisition, Pro Forma Information [Table Text Block]
Options exercisable (in shares)
Proceeds from shares sold under Employee Stock Purchase Plan
The amount of cash inflow from shares sold under employee stock purchase plan.
Revenue
us-gaap_BusinessAcquisitionsProFormaRevenue
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)
Electronic Test [Member]
Related to Electronic Test segment.
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares (in shares)
Retirement Plan Name [Axis]
Video Imaging [Member]
Related to video imaging.
Retirement Plan Name [Domain]
Flying Probe and In-circuit Testers [Member]
Related to flying probe and in-circuit testers.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstanding, weighted average exercise price (in dollars per share)
Options outstanding, weighted average exercise price (in dollars per share)
Life Sciences [Member]
Related to Life Sciences.
Environmental Technologies [Member]
Related to Environmental Technologies segment.
Process Technologies [Member]
Related to process technologies.
Customer deposits and deferred revenue
us-gaap_ContractWithCustomerLiabilityCurrent
Canceled, weighted average exercise price (in dollars per share)
Goodwill and Intangible Assets Disclosure [Text Block]
Granted, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Domestic and foreign income taxes payable
Exercised, weighted average exercise price (in dollars per share)
Security [Member]
Related to security.
Accrued wages and benefits
Lessee, Operating Leases [Text Block]
intt_ContingentLiabilityRepaymentOfStateAndLocalGrantFundsReceived
Contingent Liability, Repayment of State and Local Grant Funds Received
Amount of liability recognized arising from contingent for repayment of state and local grant funds received.
Chief Executive Officer and Chief Financial Officer [Member]
Related to Chief Executive Officer and Chief Financial Officer.
Accounts payable
Revolving Credit Facility [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options outstanding, number of shares (in shares)
Options outstanding, number of shares (in shares)
Credit Facility [Axis]
Credit Facility [Domain]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Trademarks [Member]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date
City of Rochester and State of New York [Member]
Represents information related to city of Rochester and state of New York.
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]
Trade Names [Member]
Accrued sales commissions
Alfamation [Member]
Relating to Alfamation.
us-gaap_StockIssued1
Stock issued
Accrued professional fees
intt_AnnualLeasePayments
Annual Lease Payments
Represents the amount of annual lease payments.
Indefinite-Lived Intangible Assets [Axis]
Contingent Liability, Repayment of State and Local Grant Funds Received, Policy [Policy Text Block]
Disclosure of accounting policy for contingent liability for repayment of state and local grant funds received.
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of property and equipment
us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Unvested shares of restricted stock and employee stock options (in shares)
Details of acquisition:
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage
Current liabilities:
Vesting [Axis]
Operating lease liabilities
Increase (Decrease) in Operating Lease Liability
Vesting [Domain]
Patented Technology [Member]
Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Payment Arrangement, Tranche Two [Member]
Cash payments for:
us-gaap_Assets
Identifiable Assets
Total assets
Patents [Member]
Plan Name [Axis]
Technology-Based Intangible Assets [Member]
Plan Name [Domain]
Property and equipment:
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Goodwill Intangible And Long Lived Assets [Policy Text Block]
The policy disclosure of goodwill intangible and long lived assets.
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)
Customer Relationships [Member]
Customer-Related Intangible Assets [Member]
us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
Share-Based Payment Arrangement, Amount Capitalized
Computer Software, Intangible Asset [Member]
Deferred tax assets
Share-Based Payment Arrangement [Text Block]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Shares surrendered to satisfy tax liability at vesting of stock-based awards
Contingent Consideration by Type [Axis]
Contingent Consideration Type [Domain]
Award Type [Domain]
Award Type [Axis]
Net earnings (loss)
Net earnings
Net earnings
Finite-lived, Accumulated Amortization
Net Carrying Amount, finite-lived
Balance
Balance
Intangible assets, net
Net Carrying Amount
Net Carrying Amount
Warehouse and Office Space [Member]
Relating to Warehouse and Office space.
Finite-lived, Gross Carrying Amount
Restricted Stock [Member]
Share-Based Payment Arrangement, Option [Member]
Schedule Of Intangible Assets [Table Text Block]
The tabular disclosure of the intangible assets.
us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Impact of foreign currency translation adjustments
Goodwill resulting from acquisition
Acquisition of Alfamation
Net Carrying Amount, indefinite-lived
us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Indefinite-lived, Gross Carrying Amount
Balance
Balance
Business Combination Disclosure [Text Block]
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less: accumulated depreciation
us-gaap_PropertyPlantAndEquipmentNet
Property and Equipment
Net property and equipment
Goodwill
Goodwill
Balance
Balance
us-gaap_PropertyPlantAndEquipmentGross
Gross property and equipment
Machinery and equipment
Leasehold improvements
Long-Term Debt, Type [Axis]
Long-Term Debt, Type [Domain]
us-gaap_ProfitLoss
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Interest rate swap
Interest rate swap
Members of The Senior Management [Member]
Represents members of the senior management.
intt_IncreaseDecreaseInAccruedProfessionalFees
Accrued professional fees
The amount of increase (decrease) in accrued professional fees.
Derivative Instrument [Axis]
Employees [Member]
Related to employees.
Derivative Contract [Domain]
CASH FLOWS FROM INVESTING ACTIVITIES
Range of remaining lease terms (in years) (Year)
The remaining lease term of operating leases.
Employee Stock Purchase Plan [Text Block]
The entire disclosure for employee stock purchase plan.
Employee Stock Purchase Plan [Member]
Represents the employee stock purchase plan.
us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Domestic and foreign income taxes payable
Vesting Based On Performance Metrics [Member]
Represents vesting based on performance metrics.
Letter of Credit [Member]
us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Accrued wages and benefits
Income tax expense
The Ambrell Plan [Member]
Related to the Ambrell defined contribution retirement plan.
us-gaap_IncreaseDecreaseInAccountsPayable
Accounts payable
us-gaap_OperatingExpenses
Total operating expenses
us-gaap_DebtInstrumentTerm
Debt Instrument, Term (Year)
Restricted certificates of deposit
us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount
Debt Instrument, Unused Borrowing Capacity, Amount
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
General and administrative expense
us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount
us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay
us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Defined Contribution Plan, Employer Matching Contribution, Percent of Match
Cash and cash equivalents
Impact of foreign currency translation adjustments
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome
us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Other current liabilities
us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities
Other liabilities
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
intt_DefinedContributionPlanMaximumAnnualEmployerMatchingContributionPerEmployeeAmount
Defined Contribution Plan Maximum Annual Employer Matching Contribution Per Emplyee Amount
Maximum dollar amount of employer's annual matching contribution to a defined contribution plan
Asset [Member]
The information pertaining to a financial statement line item.
Reduction in estimated fair value
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive earnings (loss)
City Area Code
New Accounting Pronouncements, Policy [Policy Text Block]
Stock Issued During Period, Value, Restricted Stock Award, Forfeitures
Forfeitures of unvested shares of restricted stock
Reclassification, Comparability Adjustment [Policy Text Block]
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Loss on disposal of property and equipment
Customer deposits and deferred revenue
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Preferred stock, shares outstanding (in shares)
us-gaap_DebtWeightedAverageInterestRate
Debt, Weighted Average Interest Rate
Current Fiscal Year End Date
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and other current assets
Weighted average discount rate
Document Fiscal Period Focus
Operating lease cost
Document Fiscal Year Focus
Short-term lease cost
Lease, Cost [Table Text Block]
Document Period End Date
Weighted average remaining lease term (in years) (Year)
Entity File Number
Entity Emerging Growth Company
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Lease Expiration Date
Document Type
Entity Small Business
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
us-gaap_AreaOfRealEstateProperty
Area of Real Estate Property (Square Foot)
us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue
Balance
Balance
Entity Filer Category
Debt Instrument [Axis]
Entity Current Reporting Status
Debt Instrument, Name [Domain]
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition Related Costs
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
us-gaap_IncreaseDecreaseInAccountsReceivable
Trade accounts receivable
Amortization of deferred compensation related to stock-based awards
Statement of Comprehensive Income [Abstract]
Entity Tax Identification Number
Entity Central Index Key
us-gaap_DepreciationAndAmortization
Acquired intangible amortization
Entity Registrant Name
Liability Class [Axis]
Fair Value by Liability Class [Domain]
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
Entity Address, Address Line One
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
us-gaap_AmortizationOfIntangibleAssets
Amortization
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Entity Address, Postal Zip Code
us-gaap_TreasuryStockCommonValue
Treasury stock, at cost; 79,382 and 75,758 shares, respectively
Entity Address, State or Province
Concentration Risk Type [Axis]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Domain]
Material Terms of Trading Arrangement [Text Block]
Entity Common Stock, Shares Outstanding
Revenue Benchmark [Member]
us-gaap_IncreaseDecreaseInOtherNoncurrentAssets
Other assets
us-gaap_IncreaseDecreaseInInventories
Inventories
Trading Symbol
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Issuance of shares in connection with acquisition of Alfamation (in shares)
Nature of Operations [Text Block]
Shares issued under Employee Stock Purchase Plan (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)
Local Phone Number
Issuance of shares in connection with acquisition of Alfamation
Stock options exercised (in shares)
Exercised, number of shares (in shares)
us-gaap_TableTextBlock
Notes Tables
Shares issued under Employee Stock Purchase Plan
Stock Issued During Period, Value, Employee Stock Purchase Plan
Issuance of unvested shares of restricted stock (in shares)
us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Forfeiture of unvested shares of restricted stock (in shares)
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Stock options exercised
Issuance of unvested shares of restricted stock
us-gaap_ProvisionForDoubtfulAccounts
Accounts Receivable, Credit Loss Expense (Reversal)
Granted, number of shares (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Canceled, number of shares (in shares)
Line of Credit, Issue Date
Line of Credit, Expiration Date
Line of Credit Facility, Lender [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Issuance of common stock, net (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Raw materials
Lender Name [Axis]
Selling expense
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
Finished goods
Work in process
us-gaap_StockIssuedDuringPeriodValueNewIssues
Stock Issued During Period, Value, New Issues
Issuance of common stock, net
UNITED STATES
Engineering and product development expense
Retained earnings
Accumulated other comprehensive earnings
Debt Disclosure [Text Block]
us-gaap_InterestExpense
Interest expense
Interest expense
us-gaap_InterestExpenseDebt
Interest Expense, Debt
Changes in assets and liabilities:
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
Inventory Disclosure [Text Block]
Subsequent Event [Member]
Operating lease liabilities, net of current portion
Schedule of Inventory, Current [Table Text Block]
intt_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted, Fair Value
Fair value of awards other than options granted during the period.
Total
Operating Lease, Liability
Restricted Stock Vesting in Three Years [Member]
Information related to the restricted stock awards vesting in three years.
Deferred income tax expense (benefit)
intt_IncreaseDecreaseInContractWithCustomerLiabilityNoncurrent
Deferred revenue, net of current portion
Amount of increase (decrease) in noncurrent obligation to transfer good or service to customer for which consideration has been received or is receivable.
Subsequent Event Type [Axis]
Current portion of operating lease liabilities
Subsequent Event Type [Domain]
Retirement Benefits [Text Block]
us-gaap_IntangibleAssetsGrossExcludingGoodwill
Intangible Assets, Gross Carrying Amount
Acculogic [Member]
Represents Acculogic.
Right-of-use assets, net
us-gaap_OperatingLeaseRightOfUseAsset
Operating Lease, Right-of-Use Asset
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less imputed interest
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2027
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2024 (remainder)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2028
Schedule of Changes in Goodwill [Table Text Block]
Tabular disclosure of the changes in goodwill.
Fair Value Measurement, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2026
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2027
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2028
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2025
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2026
Automotive [Member]
Represents Automotive.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Subsequent Events, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2025
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
us-gaap_ShareBasedCompensation
Amortization of deferred compensation related to stock-based awards
Other assets
Lessee, Leases [Policy Text Block]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
2024 (remainder)
Environmental Technologies in Germany [Member]
Represents Environmental technologies in Germany
Business Combinations Policy [Policy Text Block]
Earnings Per Share, Policy [Policy Text Block]
intt_SharebasedCompensationArrangementBySharebasedPaymentAwardDiscountAmount
Share-based Compensation Arrangement by Share-based Payment Award, Discount Amount
Discount on shares sold under Employee Stock Purchase Plan
Discount amount from fair value on purchase date that participants pay for shares.
us-gaap_Revenues
Revenues
us-gaap_FiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss
Impact of foreign currency translation adjustments
Operating expenses:
Income Tax, Policy [Policy Text Block]
Payments Based on Performance Metrics [Member]
Represents payments based on performance metrics.
intt_MinimumAmountRequiredForInvoicesReceived
Minimum Amount Required for Invoices Received
Minimum amount required for invoices received.
Schedule of Finite-Lived Intangible Assets [Table Text Block]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract (Year)
Customer Backlog [Member]
Represents customer backlog.
us-gaap_IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss
Impact of foreign currency translation adjustments
Schedule of Indefinite-Lived Intangible Assets [Table Text Block]
Depreciation and amortization
intt_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageLowerRange
Share-based Compensation Arrangement By Share-based Payment Award, Award Vesting Rights Percentage Lower Range
Lower range limit of percentage of vesting of award under share-based payment arrangement.
intt_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentageUpperRange
Share-based Compensation Arrangement By Share-based Payment Award, Award Vesting Rights Percentage Upper Range
Upper range limit of percentage of vesting of award under share-based payment arrangement.
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
Treasury stock, shares (in shares)
us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability
Common stock, $0.01 par value; 20,000,000 shares authorized; 12,591,662 and 12,241,925 shares issued, respectively
us-gaap_NoncashOrPartNoncashAcquisitionValueOfLiabilitiesAssumed1
Liabilities assumed
Measurement Frequency [Axis]
Fair value of assets acquired, net of cash
Measurement Frequency [Domain]
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Fair Value, Recurring [Member]
Common stock, shares authorized (in shares)
Common stock, shares issued (in shares)
Common stock, par value (in dollars per share)
Statistical Measurement [Domain]
Maximum [Member]
Minimum [Member]
Product and Service [Axis]
Product and Service [Domain]
Statistical Measurement [Axis]
Accrued expenses
intt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedLiabilities
Amount of accrued liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.
Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued or outstanding
Preferred stock, shares issued (in shares)
Contingent Consideration Liabilities [Member]
Represents contingent consideration liabilities.
Domestic and foreign income taxes
intt_IntangibleAssetsAcquiredTotal
Total intangible assets
Amount of increase in assets, excluding financial assets, lacking physical substance, from an acquisition.
Geographical [Axis]
Geographical [Domain]
Preferred stock, shares authorized (in shares)
Debt (current and long-term)
intt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesDebt
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Debt
Amount of debt obligations assumed in business combination.
Inventories
Total inventories
Preferred stock par value (in dollars per share)
Vesting on January 1, 2025, Based on Performance Metrics [Member]
Pertain to the vesting schedule and criteria of award under share-based payment arrangement.
Net revenues
Revenue
Revenue from Contract with Customer, Including Assessed Tax
President of Process Technologies [Member]
Pertains to President of Environmental Technologies.
Fair Value, Inputs, Level 3 [Member]
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Foreign exchange (gain) loss
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
Customer [Domain]
Share-Based Payment Arrangement, Vesting on Third Anniversary of Grant Date [Member]
Vesting schedule of award under share-based payment arrangement.
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 2 [Member]
Chief Executive Officer, Chief Financial Officer, and Division Presidents [Member]
Pertains to the CEO, CFO, and Division Presidents.
Fair Value Hierarchy and NAV [Axis]
Inventory consigned to others
End User [Member]
Customers who are the end user of the company's products.
Semiconductor Market [Member]
The semiconductor market into which the reporting entity sells products.
Debt Instrument, Long-term, Fixed Interest Rate Debt [Member]
Information pertaining to the debt instrument.
Service and Other Products [Member]
Represents information about services and other products sold by the reporting entity.
Semiconductor Production Test Products [Member]
Represents information about semiconductor production test products sold by the reporting entity.
Debt Instrument, Short-term, Variable Interest Rate Debt [Member]
Infoamrti0n pertaining to the debt instrument.
Industrial Market [Member]
The industrial market into which the reporting entity sells products.
CASH FLOWS FROM OPERATING ACTIVITIES
401(k) Plan [Member]
A 401(k) plan offered by the reporting entity to eligible employees.
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenue [Policy Text Block]
Statement [Line Items]
Allowance for doubtful accounts
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
Trade accounts receivable, net of allowance for credit losses of $416 and $474, respectively
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Additional paid-in capital
AOCI Attributable to Parent [Member]
Stockholders' equity:
Other income
Other income (expense)
us-gaap_NonoperatingIncomeExpense
Segment Reporting Disclosure [Text Block]
Current assets:
Fair Value Disclosures [Text Block]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash, cash equivalents and restricted cash at beginning of period
Cash, cash equivalents and restricted cash at end of period
Inventory, Policy [Policy Text Block]
Effects of exchange rates on cash
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net cash (used in) provided by all activities
Texas Instruments Incorporated [Member]
Texas instruments incorporated member.
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash (used in) provided by financing activities
us-gaap_Liabilities
Total liabilities
Commitments and Contingencies
Sale of Stock [Axis]
Schedule Of Outstanding Letters Of Credit [Table Text Block]
Schedule of outstanding letters of credit table text block.
Sale of Stock [Domain]
Mt Laurel [Member]
Represents information about Mt laurel.
us-gaap_OperatingIncomeLoss
Operating income
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash (used in) provided by operating activities
Mansfield [Member]
Represents information about Mansfield.
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
Prepaid expenses and other current assets
Cost of revenue
us-gaap_GrossProfit
Gross profit
intt_DefinedContributionPlanEmployerMatchingContributionVestingPeriod
Defined Contribution Plan Employer Matching Contribution Vesting Period (Year)
Defined contribution plan employer matching contribution vesting period.
Counterparty Name [Axis]
Counterparty Name [Domain]
Derivatives, Policy [Policy Text Block]
Consolidation Items [Domain]
Deferred tax liabilities
Provision for excess and obsolete inventory
us-gaap_InventoryWriteDown
Inventory Write-down
Thermal Testing Products [Member]
Represents information about Thermal products sold by the reporting entity.
Consolidation Items [Axis]
At-the-Market Issuance Sales Agreement [Member]
Represents At-the-Market Issuance Sales Agreement.
intt_CommissionFeePercentageOfGrossProceeds
Commission Fee, Percentage of Gross Proceeds
The percentage charged for the sales of shares.
Consolidated Entities [Axis]
Consolidated Entities [Domain]
President of Environmental Technologies [Member]
Represents the president of Environmental Technologies.
The 2023 Stock Incentive Plan [Member]
Represents the 2023 Stock Incentive Plan.
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Settlement of employee tax liabilities in connection with treasury stock transaction
Automobile Lease, One [Member]
Represents the type of leasing arrangement.
Letters of Credit Amount Outstanding
Automobile Lease, Two [Member]
Represents the type of leasing arrangement.
Process Technologies in Europe [Member]
Represents the process technologies segment in Europe
Retained Earnings [Member]
intt_DebtInstrumentCovenantFixedChargeCoverageRatio
Debt Instrument, Covenant, Fixed Charge Coverage Ratio
Represents the covenant for a debt instrument relating to the fixed charge coverage ratio.
intt_DebtInstrumentCovenantRatioOfConsolidatedFundedDebtToConsolidatedEbitda
Debt Instrument, Covenant, Ratio of Consolidated Funded Debt to Consolidated EBITDA
Represents the covenant for a debt instrument relating to the ratio of consolidated funded debt to consolidated EBITDA.
Proceeds from stock options exercised
Title and Position [Domain]
Net proceeds from public offering of common stock
Title and Position [Axis]
Treasury Stock, Common [Member]
Additional Paid-in Capital [Member]
Common Stock [Member]
intt_IncreaseDecreaseInAccruedSalesCommission
Accrued sales commissions
The increase (decrease) during the reporting period in accrued sales commission.
Equity Components [Axis]
Equity Component [Domain]
us-gaap_LongTermDebt
Long-Term Debt
Long-Term Debt
Performance-Based Restricted Stock [Member]
Represents the performance-based restricted stock.
Term Note [Member]
Information related to Term Note.
Other Current Liabilities [Member]
October 2021 Agreement [Member]
Information related to the October 2021 Agreement.
Earnings before income tax expense
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Earnings before income tax expense
M&T Bank [Member]
Information related to M&T Bank.
intt_DebtInstrumentDrawPeriod
Debt Instrument, Draw Period (Year)
Represents the period of time in which funds can be withdrawn under debt agreement, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
intt_DebtInstrumentInterestRateInEventOfDefault
Debt Instrument, Interest Rate in Event of Default
Contractual interest rate for funds borrowed in event of default, under the debt agreement.
us-gaap_LineOfCredit
Long-Term Line of Credit, Total
Timing of Transfer of Good or Service [Domain]
Transferred over Time [Member]
Disaggregation of Revenue [Table Text Block]
Timing of Transfer of Good or Service [Axis]
us-gaap_RepaymentsOfLongTermDebt
Repayments of long-term borrowings
Revenue from Contract with Customer [Text Block]
Statement of Financial Position Location, Balance [Axis]
Statement of Financial Position Location, Balance [Domain]
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Document Quarterly Report
Receivable [Policy Text Block]
Entity Incorporation, State or Country Code
General and Administrative Expense [Member]
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Document Transition Report
Concentration Risk Disclosure [Text Block]
us-gaap_ShortTermBorrowings
Short-Term Debt
Entity Interactive Data Current
Selling and Marketing Expense [Member]
Security Exchange Name
Title of 12(b) Security
intt_AggregateOfferingPriceOfStock
Aggregate Offering Price of Stock
The aggregate value offering price of stock issued and sold.
us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Accounts Receivable, Allowance for Credit Loss, Writeoff
OEM, Integrators and Distributor [Member]
Represents OEM, Integrators and Distributor
us-gaap_ProceedsFromIssuanceOfLongTermDebt
Proceeds from Issuance of Long-term Debt, Total
Cost of Sales [Member]
Research and Development Expense [Member]
Amended Loan Agreement [Member]
Represents The Loan Agreement, As Amended by the Third Amendment, the “amended Loan Agreement.
Statement of Income Location, Balance [Axis]
Statement of Income Location, Balance [Domain]
Basis Of Presentation And Use Of Estimates [Policy Text Block]
Basis of presentation and use of estimates policy text block.
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Segments [Axis]
Segments [Domain]
Corporate Segment [Member]
Industry Sector [Domain]
us-gaap_SharePrice
Share Price (in dollars per share)
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Average number of potentially dilutive securities excluded from calculation because their effect was anti-dilutive during the period (in shares)
Weighted average common shares and common share equivalents outstanding - diluted (in shares)
Weighted average common shares and common share equivalents outstanding - diluted (in shares)
Proceeds from short-term borrowings
Industry Sector [Axis]
Non-US [Member]
Statement [Table]
Statement of Financial Position [Abstract]
Earnings per common share - diluted (in dollars per share)
Weighted average common shares outstanding - basic (in shares)
Weighted average common shares outstanding - basic (in shares)
Business Acquisition [Axis]
Earnings per common share - basic (in dollars per share)
Business Acquisition, Acquiree [Domain]
Statement of Cash Flows [Abstract]
2024 (remainder)
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear
us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High
Lease Contractual Term [Domain]
Statement of Stockholders' Equity [Abstract]
Lease Contractual Term [Axis]
Income Statement [Abstract]
Other comprehensive loss
2027
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
2028
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
Revenue from External Customers by Geographic Areas [Table Text Block]
us-gaap_BusinessCombinationContingentConsiderationLiability
Business Combination, Contingent Consideration, Liability
Contingent consideration liability
Long-Lived Assets by Geographic Areas [Table Text Block]
2025
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
2026
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
intt_SharebasedCompensationArrangementBySharebasedPaymentAwardProbableFinalVestingPercentage
Share-Based Compensation Arrangement by Share-Based Payment Award, Probable Final Vesting Percentage
Probable final vesting percentage of share-based payment award.
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)
us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred
Contingent consideration
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]
Thermal Process [Member]
Represents thermal process.
CASH FLOWS FROM FINANCING ACTIVITIES
Other liabilities
Defense/ Aerospace [Member]
Represents defense/ aerospace.
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Independent Directors [Member]
Represents the independent directors.
us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Deferred Compensation Liability, Classified, Noncurrent
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Total purchase price
us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense
Operating Lease, Right-of-Use Asset, Periodic Reduction
Deferred revenue, net of current portion
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Acquisition of business, net of cash acquired
Net cash paid for acquisition
intt_CovenantFutureAmountReceivable
Covenant, Future Amount Receivable
Future amount receivable if we create and maintain specified levels of employment in the specified location through various dates ending in 2023.
Class of Stock [Axis]
Deferred tax liability
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilities
Term Note and other long-term debt, net of current portion
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
Building Leases in the U.S., the Netherlands and Singapore [Member]
Represents building leases for certain of our facilities located in the U.S., the Netherlands and Singapore.
Other non-current liabilities
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther
Interest Rate Swap [Member]
Schedule of Weighted Average Number of Shares [Table Text Block]
Accounts payable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
Unrealized gain (loss) on interest rate swap agreement
Operating Segments [Member]
Other Multi Markets [Member]
Information related to other multi markets.
intt_NumberOfMajorCustomers
Number of Major Customers
Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.
intt_DeferredGrantProceeds
Deferred Grant Proceeds
Represents the amount of deferred grant proceeds.
Property and equipment
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Other assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets