Document And Entity Information
Dividend yield
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 2 - Summary of Significant Accounting Policies
us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Expected income tax provision at U.S. statutory rate
Note 3 - Goodwill and Intangible Assets
Risk-free interest rate
Note 4 - Revenue From Contracts With Customers
Note 6 - Inventories
Note 7 - Leases
Note 8 - Other Current Liabilities
Note 9 - Debt
Note 10 - Income Taxes
Income Tax Disclosure [Text Block]
Note 12 - Stock-based Compensation Plan
Note 15 - Segment Information
Note 16 - Quarterly Consolidated Financial Data (Unaudited)
Note 17 - Subsequent Events
Expected common stock market price volatility factor
Earnout payable
us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
Schedule II - Valuation and Qualifying Accounts
us-gaap_LiabilitiesCurrent
Total current liabilities
Note 2 - Summary of Significant Accounting Policies - Weighted Average Common Shares (Details)
Note 3 - Goodwill and Intangible Assets - Component of Goodwill (Details)
Note 3 - Goodwill and Intangible Assets - Changes in the Amount of the Carrying Value of Intangible Assets (Details)
Other current liabilities
Total other current liabilities
Weighted average expected life of stock options (years) (Year)
Note 3 - Goodwill and Intangible Assets - Intangible Assets (Details)
Note 3 - Goodwill and Intangible Assets - Future Amortization Expense (Details)
Note 4 - Revenue From Contracts With Customers - Disaggregation of Revenues (Details)
Note 4 - Revenue From Contracts With Customers - Changes in Allowance for Doubtful Accounts (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Note 6 - Inventories - Inventories Held (Details)
Note 7 - Leases - Lease Costs (Details)
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Note 7 - Leases - Maturities of Lease Liabilities (Details)
Note 7 - Leases - Supplemental Cash Flow Information (Details)
Note 7 - Leases - Minimum Rental Commitments Under Noncancellable Operating Leases (Details)
Note 8 - Other Current Liabilities - Other Current Liabilities (Details)
Note 9 - Debt - Outstanding Letters of Credit (Details)
Share-based Payment Arrangement, Option, Activity [Table Text Block]
Note 10 - Income Taxes - Earnings Before Income Taxes (Details)
Note 10 - Income Taxes - Income Tax Expense (Benefit) (Details)
Granted, weighted average exercise price (in dollars per share)
Note 10 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Foreign currency translation adjustments
Vested, weighted average exercise price (in dollars per share)
Note 10 - Income Taxes - Effective Tax Rate Analysis and Reconciliation of Expected Statutory Rate (Details)
Forfeited, weighted average exercise price (in dollars per share)
Note 12 - Stock-based Compensation Plan - Allocation of Share-based Compensation Expense (Details)
Note 12 - Stock-based Compensation Plan - Stock Options Valuation Assumptions (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Unvested shares, weighted average exercise price (in dollars per share)
Unvested shares, weighted average exercise price (in dollars per share)
Note 12 - Stock-based Compensation Plan - Stock Option Activity (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Forfeited, number of shares (in shares)
Note 12 - Stock-based Compensation Plan - Stock Option Activity (Details) (Parentheticals)
Note 12 - Stock-based Compensation Plan - Unvested Stock Activity (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Unvested shares (in shares)
Unvested shares (in shares)
Note 15 - Segment Information - Segment Information (Details)
us-gaap_GoodwillAndIntangibleAssetImpairment
Goodwill and Intangible Asset Impairment, Total
Schedule of Nonvested Share Activity [Table Text Block]
Note 15 - Segment Information - Identifiable Assets (Details)
Note 15 - Segment Information - Net Revenue From Unaffiliated Customers (Details)
Note 15 - Segment Information - Long-lived Assets by Geographical Area (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested, number of shares (in shares)
Note 16 - Quarterly Consolidated Financial Data (Unaudited) - Quarterly Consolidated Financial Data (Details)
Note 17 - Subsequent Events (Details)
Schedule II Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Options exercisable (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Retirement Plan Name [Axis]
Retirement Plan Name [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options outstanding, weighted average exercise price (in dollars per share)
Options outstanding, weighted average exercise price (in dollars per share)
Customer deposits and deferred revenue
us-gaap_ContractWithCustomerLiabilityCurrent
Canceled, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
Goodwill and Intangible Assets Disclosure [Text Block]
Schedule of Goodwill [Table Text Block]
Granted, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Domestic and foreign income taxes payable
Accrued wages and benefits
Lessee, Operating Leases [Text Block]
Contingent liability for repayment of state and local grant funds received
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.
Accounts payable
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Options outstanding, number of shares (in shares)
Options outstanding, number of shares (in shares)
intt_IncreaseDecreaseInContingentLiabilitiesRepaymentOfStateAndLocalFundsReceived
Contingent liability for repayment of state and local grant funds received
Represents the increase or decrease amount in contingent liabilities for repayment of state and local funds received.
Credit Facility [Axis]
Credit Facility [Domain]
Other
Trademarks [Member]
us-gaap_PolicyTextBlockAbstract
Accounting Policies
City of Rochester and State of New York [Member]
Represents information related to city of Rochester and state of New York.
Accrued warranty
Trade Names [Member]
Accrued sales commission
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
us-gaap_StockIssued1
Issuance of unvested shares of restricted stock
Accrued professional fees
Accrued rent/facility costs
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]
Capital expenditures
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of property and equipment
Unvested shares of restricted stock and employee stock options (in shares)
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period
Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block]
intt_DiscountedCashFlowsDiscountRate
Discounted Cash Flows, Discount Rate
Discount rate used by discounted cash flows.
Current liabilities:
Patented Technology [Member]
Cash payments for:
us-gaap_Assets
Total assets
Identifiable Assets
intt_PaymentsForStockRepurchasedBrokerFees
Payments for Stock Repurchased Broker Fees
The cash outflow for broker fees incurred with the stock repurchased.
Patents [Member]
Plan Name [Axis]
Plan Name [Domain]
Property and equipment:
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total
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
Customer Relationships [Member]
Legal Matters and Contingencies [Text Block]
us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
Share-based Payment Arrangement, Amount Capitalized
Computer Software, Intangible Asset [Member]
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_IncreaseDecreaseOfRestrictedInvestments
Restricted certificates of deposit
intt_ReversalOfTransitionTaxPayable
Reversal of Transition Tax Payable
Represents information related to reversal of transition tax payable.
Award Type [Domain]
Global intangible low taxed income
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to global intangible low taxed income.
Award Type [Axis]
Net earnings
Net earnings
Net earnings (loss)
Net earnings
intt_IncomeTaxReconciliationSection250ForeignDerivedIntangibleIncomeDeduction
Section 250 foreign derived intangible income deduction
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to section 250, foreign derived intangible income deduction.
Finite-lived, Accumulated Amortization
Net Carrying Amount
Balance
Balance
Intangible assets, net
Net Carrying Amount
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.
Ambrell [Member]
Related to the acquisition of Ambrell.
Net Carrying Amount
us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Indefinite-lived, Gross Carrying Amount
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Less: accumulated depreciation
us-gaap_PropertyPlantAndEquipmentNet
Net property and equipment
Property and Equipment
Goodwill
Goodwill, Ending Balance
us-gaap_PropertyPlantAndEquipmentGross
Gross property and equipment
Machinery and equipment
Leasehold improvements
Operating lease liabilities
Increase (Decrease) in Operating Lease Liabilities
The amount of increase (decrease) in operating lease liabilities.
EMS [Member]
Represents the information pertaining to inTEST Electromechanical Semiconductor Products (EMS).
Accrued professional fees
intt_IncreaseDecreaseInAccruedProfessionalFees
The amount of increase (decrease) in accrued professional fees.
Acquisition costs
intt_DeferredTaxAssetsAcquisitionCosts
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible acquisition costs.
Range of remaining lease terms (in years) (Year)
Operating Lease, Remaining Lease Term
The remaining lease term of operating leases.
CASH FLOWS FROM INVESTING ACTIVITIES
us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Domestic and foreign income taxes payable
Letter of Credit [Member]
us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Accrued wages and benefits
Earnings (loss) before income tax expense (benefit)
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Total
Earnings (loss) before income tax expense
Income tax expense (benefit)
Income tax expense
Income tax expense
Income tax expense (benefit)
The Ambrell Plan [Member]
Related to the Ambrell defined contribution retirement plan.
us-gaap_IncreaseDecreaseInAccountsPayable
Accounts payable
us-gaap_OperatingExpenses
Total operating expenses
Restricted certificates of deposit
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
General and administrative expense
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
us-gaap_LeaseAndRentalExpense
Operating Leases, Rent Expense, Total
Cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
UNITED KINGDOM
us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Other current liabilities
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
intt_DefinedContributionPlanMaximumAnnualEmployerMatchingContributionPerEmplyeeAmount
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
us-gaap_AllocatedShareBasedCompensationExpense
Allocation of Share-based Compensation Expense
Asset [Member]
The information pertaining to a financial statement line item.
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive earnings
New Accounting Pronouncements, Policy [Policy Text Block]
Reclassification, Policy [Policy Text Block]
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Loss on disposal of property and equipment
Customer deposits and deferred revenue
Preferred stock, shares outstanding (in shares)
Current Fiscal Year End Date
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
intt_ForfeitureOfUnvestedSharesOfRestrictedStockInANoncashInvestingAndFinancingActivities
Forfeiture of unvested shares of restricted stock
Represents the value of forfeiture of unvested shares of restricted stock in a non-cash investing and financing activities.
Weighted average remaining lease term (in years) (Year)
Entity Emerging Growth Company
Lease Expiration Date
Document Type
Entity Small Business
Entity Shell Company
Document Information [Line Items]
Document Information [Table]
Entity Public Float
Entity Filer Category
Debt Instrument [Axis]
Entity Current Reporting Status
Debt Instrument, Name [Domain]
Entity Voluntary Filers
Entity Well-known Seasoned Issuer
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
us-gaap_IncreaseDecreaseInAccountsReceivable
Trade accounts receivable
Amortization of deferred compensation related to stock-based awards
Quarterly Financial Information [Text Block]
Statement of Comprehensive Income [Abstract]
Entity Central Index Key
Depreciation/amortization
us-gaap_DepreciationAndAmortization
Entity Registrant Name
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
us-gaap_AmortizationOfIntangibleAssets
Amortization of Intangible Assets, Total
Amortization
NETHERLANDS
Concentration Risk Type [Axis]
Concentration Risk Type [Domain]
us-gaap_AllowanceForDoubtfulAccountsReceivable
Balance
Balance
us-gaap_TreasuryStockValue
Treasury stock, at cost; 33,077 shares
Entity Common Stock, Shares Outstanding (in shares)
us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
Stock Repurchased and Retired During Period, Value
Repurchase and retirement of common stock
us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Stock Repurchased and Retired During Period, Shares
Repurchase and retirement of common stock (in shares)
Revenue Benchmark [Member]
intt_BusinessCombinationContingentConsiderationArrangementsPaymentOfEarnoutForPriorYearAcquisitionOperatingActivities
Payment of earnout related to Ambrell acquisition
Amount of the payment for prior year acquisition earnout payables that affects operating activities.
intt_DecreaseInOperatingLeaseLiabilitiesAndRightOfUseAssetsNonCash
Decrease In Operating Lease Liabilities and Right-of-Use Assets, Non-cash
Non-cash decreases in operating lease liabilities and right-of-use assets as a result of lease modifications
Represents the non-cash decrease in operating lease liabilities and right-of-use assets.
us-gaap_IncreaseDecreaseInOtherNoncurrentAssets
Other assets
Schedule of Leases Cash Flow Information [Table Text Block]
Tabular disclosure of leases related to cash flow information.
intt_IncreaseDecreaseInOperatingLeaseRightOfUseAsset
Increase (Decrease) in Operating Lease Right-of-Use Assets
The amount of increase (decrease) in operating lease right of use assets.
us-gaap_IncreaseDecreaseInInventories
Inventories
Trading Symbol
intt_BusinessCombinationContingentConsiderationArrangementsPaymentOfEarnoutForPriorYearAcquisitionFinancingActivities
Payment of earnout for 2017 related to Ambrell acquisition
Amount of the payment for prior year acquisition earnout payables that affects financing activities.
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
Nature of Operations [Text Block]
Exercised, number of shares (in shares)
us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
us-gaap_TableTextBlock
Notes Tables
Issuance of unvested shares of restricted stock (in shares)
us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited
Forfeiture of unvested shares of restricted stock (in shares)
Issuance of unvested shares of restricted stock
us-gaap_ProvisionForDoubtfulAccounts
Accounts Receivable, Credit Loss Expense (Reversal)
Granted, number of shares (in shares)
Granted, number of shares (in shares)
Canceled, number of shares (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Line of Credit, Issue Date
Line of Credit, Expiration Date
Raw materials
Selling expense
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities and stockholders' equity
Finished goods
Work in process
UNITED STATES
Retained earnings
Engineering and product development expense
Accumulated other comprehensive earnings
Debt Disclosure [Text Block]
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]
Total
Subsequent Event Type [Axis]
Current portion of operating lease liabilities
Subsequent Event Type [Domain]
Pension and Other Postretirement Benefits Disclosure [Text Block]
Intangible Assets, Gross Carrying Amount
Subsequent Events [Text Block]
Right of use assets, net
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total lease payments
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less imputed interest
Deferred income tax expense (benefit)
Total
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2022
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2023
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
2024
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
Thereafter
Fair Value Measurement, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2021
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2022
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2023
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2020
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
2024
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2021
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Subsequent Events, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2020
SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain]
SEC Schedule, 12-09, Reserve, Warranty [Member]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
us-gaap_ShareBasedCompensation
Amortization of deferred compensation related to stock-based awards
Other assets
Lessee, Leases [Policy Text Block]
SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis]
Business Combinations Policy [Policy Text Block]
Earnings Per Share, Policy [Policy Text Block]
Operating expenses:
Income Tax, Policy [Policy Text Block]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract
us-gaap_LesseeOperatingLeaseRenewalTerm
Lessee, Operating Lease, Renewal Term
Research and Development Expense, Policy [Policy Text Block]
Operating lease liabilities
intt_DeferredTaxAssetsOperatingLeases
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from operating leases.
us-gaap_Depreciation
Depreciation, Total
Depreciation and amortization
intt_DeferredTaxLiabilitiesRightOfUseAssets
Right of use assets
Amount of deferred tax liability attributable to taxable temporary differences from right-of-use assets.
us-gaap_AssetsCurrent
Total current assets
Share-based Payment Arrangement [Policy Text Block]
Adjustment to contingent consideration liability
Treasury stock, shares (in shares)
Common stock, $0.01 par value; 20,000,000 shares authorized; 10,413,982 and 10,523,035 shares issued, respectively
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Common stock, shares authorized (in shares)
Common stock, shares issued (in shares)
Balance (in shares)
Balance (in shares)
Common stock, par value (in dollars per share)
us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance
Statistical Measurement [Domain]
Maximum [Member]
Minimum [Member]
Product and Service [Axis]
us-gaap_DeferredTaxAssetsNet
Deferred tax assets
Product and Service [Domain]
Statistical Measurement [Axis]
Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued or outstanding
Preferred stock, shares issued (in shares)
Domestic and foreign income taxes
Other
us-gaap_DeferredTaxAssetsOther
Geographical [Axis]
Geographical [Domain]
us-gaap_DeferredTaxAssetsGross
Total
Preferred stock, shares authorized (in shares)
us-gaap_DeferredIncomeTaxLiabilities
Deferred tax liabilities
CALIFORNIA
Inventories
Total inventories
Preferred stock par value (in dollars per share)
Net revenues
Net revenues
Net revenues
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Foreign Currency Transaction Gain (Loss), before Tax, Total
Foreign exchange loss
Customer [Axis]
Inventories
us-gaap_DeferredTaxAssetsInventory
Customer [Domain]
Schedule of Changes in Allowance for Doubtful Accounts Receivable [Table Text Block]
Tabular disclosure of the changes in the allowance for doubtful accounts receivable.
OEM and Integrators [Member]
Customers who are original equipment manufacturers and/or integrators.
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.
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.
Other Non-semiconductors Markets [Member]
Markets other than the semiconductor market into which the reporting entity sells products.
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, Plant and Equipment, Useful Life
Telecommunications Market [Member]
The telecommunications market into which the reporting entity sells products.
Industrial Market [Member]
The industrial market into which the reporting entity sells products.
CASH FLOWS FROM OPERATING ACTIVITIES
Accrued warranty
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves
401(k) Plan [Member]
A 401(k) plan offered by the reporting entity to eligible employees.
Federal transition tax payable
Amount of increase (decrease) in federal transition tax payable.
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Allowance for doubtful accounts
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Revenue [Policy Text Block]
Statement [Line Items]
Allowance for doubtful accounts
intt_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfEarnoutPayable
Adjustment to earnout payable
Amount of increase (decrease) in the value of a earnout payable, including, but not limited to, differences arising upon settlement.
Accrued vacation pay and stock-based compensation
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
Trade accounts receivable, net of allowance for doubtful accounts of $211 and $233, respectively
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Additional paid-in capital
AOCI Attributable to Parent [Member]
Stockholders' equity:
Property, Plant and Equipment, Policy [Policy Text Block]
Other income (loss)
Segment Reporting Disclosure [Text Block]
Tax credit carryforwards
Net operating loss (state and foreign)
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Proceeds from sale of demonstration equipment, net of gain
Proceeds from sale of machinery and equipment net of gain.
Current assets:
Thermonics [Member]
Represents information about Thermonics.
Sigma [Member]
Represents information about Sigma.
Inventory, Policy [Policy Text Block]
Deferred tax assets:
Texas Instruments Incorporated [Member]
Texas instruments incorporated member.
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash used in financing activities
us-gaap_Liabilities
Total liabilities
Commitments and Contingencies (Note 11)
Director [Member]
Schedule Of Outstanding Letters Of Credit [Table Text Block]
Schedule of outstanding letters of credit table text block.
Mt Laurel [Member]
Represents information about Mt laurel.
intt_IncomeTaxRateReconciliationFederalTransitionTaxPayableAmount
Effective Income Tax Rate Reconciliation, Federal Transition Tax Payable, Amount
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to federal transition tax payable.
Operating income (loss)
us-gaap_OperatingIncomeLoss
Operating income
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by (used in) operating activities
Mansfield [Member]
Represents information about Mansfield.
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_DeferredTaxLiabilities
Net deferred tax liabilities
Prepaid expenses and other current assets
Effects of exchange rates on cash
us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Net cash provided by (used in) all activities
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Net intangible assets
Cost of revenues
intt_IncomeTaxReconciliationEffectsOfNetOperatingLossAndTaxCreditCarryforwards
NOL carryforwards utilized
Income tax reconciliation effects of net operating loss and tax credit carryforwards.
us-gaap_GrossProfit
Gross margin
Gross margin
intt_DefinedContributionPlanEmployerMatchingContributionVestingPeriod
Defined Contribution Plan Employer Matching Contribution Vesting Period
Defined contribution plan employer matching contribution vesting period.
Counterparty Name [Axis]
Counterparty Name [Domain]
Deferred tax liabilities
Consolidation Items [Domain]
Provision for excess and obsolete inventory
Inventory Write-down
Thermal Testing Products [Member]
Represents information about Thermal products sold by the reporting entity.
Consolidation Items [Axis]
Accounting Standards Update 2016-02 [Member]
Valuation Allowances and Reserves [Table Text Block]
Tabular disclosure of a schedule of allowance and reserve accounts where the valuation and qualifying accounts are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.
Type of Adoption [Domain]
us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Depreciation of property and equipment
Letters of Credit Amount Outstanding
Letters of Credit Outstanding, Amount
Adjustments for New Accounting Pronouncements [Axis]
Deferred tax liabilities:
Adjustment to contingent consideration liability
intt_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiabilityAndEarnoutPayable
Amount of increase (decrease) in the value of a contingent consideration liability and earnout payable, including, but not limited to, differences arising upon settlement.
us-gaap_PaymentsForRepurchaseOfCommonStock
Repurchases of common stock
Retained Earnings [Member]
Title of Individual [Domain]
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Domestic – state
Title of Individual [Axis]
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Domestic – state
Treasury Stock [Member]
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
Additional Paid-in Capital [Member]
us-gaap_CurrentFederalTaxExpenseBenefit
Domestic – Federal
Common Stock [Member]
us-gaap_StockRepurchaseProgramAuthorizedAmount1
Stock Repurchase Program, Authorized Amount
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Domestic – Federal
Accrued sales commission
intt_IncreaseDecreaseInAccruedSalesCommission
The increase (decrease) during the reporting period in accrued sales commission.
Non-cash increases in operating lease liabilities and right-of-use assets as a result of lease modifications
Increase in Operating Lease Liabilities and Right-of-Use Assets, Non-cash
Represents the non-cash increase in operating lease liabilities and right-of-use assets.
intt_OperatingLeaseIncreaseInArea
Operating Lease, Increase in Area
Represents the amount of increase in the area of an operating lease during the period.
Mansfield, Massachusetts [Member]
Represents information pertaining to Mansfield, Massachusetts.
Equity Components [Axis]
Equity Component [Domain]
us-gaap_CurrentIncomeTaxExpenseBenefit
Total
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Foreign
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Earnings before income tax expense
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Domestic
Disaggregation of Revenue [Table Text Block]
Revenue from Contract with Customer [Text Block]
Cash and Cash Equivalents, Policy [Policy Text Block]
Receivable [Policy Text Block]
General and Administrative Expense [Member]
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
Concentration Risk Disclosure [Text Block]
Entity Interactive Data Current
Selling and Marketing Expense [Member]
Bad debt expense
Title of 12(b) Security
us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Write-offs
Cost of Sales [Member]
Research and Development Expense [Member]
us-gaap_ValuationAllowancesAndReservesBalance
Balance at Beginning of Period
Balance at End of Period
Expense (Recovery)
Income Statement Location [Axis]
Income Statement Location [Domain]
us-gaap_ValuationAllowancesAndReservesDeductions
Deductions
Basis Of Presentation And Use Of Estimates [Policy Text Block]
Basis of presentation and use of estimates policy text block.
Segments [Axis]
Segments [Domain]
Industry Sector [Domain]
Average number of potentially dilutive securities excluded from calculation (in shares)
Weighted average common shares outstanding – diluted (in shares)
Weighted average common shares and common share equivalents outstanding – diluted (in shares)
Industry Sector [Axis]
Non-US [Member]
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Statement [Table]
Statement of Financial Position [Abstract]
Net earnings (loss) per common share – diluted (in dollars per share)
Net earnings per common share – diluted (in dollars per share)
us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Thereafter
Weighted average common shares outstanding – basic (in shares)
Weighted average common shares outstanding – basic (in shares)
Weighted average common shares outstanding–basic (in shares)
us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Total
Business Acquisition [Axis]
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
2022
Net earnings (loss) per common share – basic (in dollars per share)
Net earnings per common share – basic (in dollars per share)
Business Acquisition, Acquiree [Domain]
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
2023
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
2020
Statement of Cash Flows [Abstract]
us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
2021
Statement of Stockholders' Equity [Abstract]
us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
2019
Income Statement [Abstract]
Other comprehensive loss
Prospective Adoption of New Accounting Pronouncements [Axis]
Accounting Guidance [Domain]
Previous Accounting Guidance [Member]
Revenue from External Customers by Geographic Areas [Table Text Block]
Long-lived Assets by Geographic Areas [Table Text Block]
Quarterly Financial Information [Table Text Block]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Current Liabilities [Table Text Block]
Tabular disclosure of current liabilities.
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Current
Deferred
Increase (decrease) in tax from:
intt_IncomeTaxReconciliationDeemedDividendFromForeignSubsidiaries
Dividend from foreign subsidiaries
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to a deemed dividend from foreign subsidiaries.
intt_EquipmentLeasedToCustomersInitialTerm
Equipment Leased To Customers Initial Term
With regard to certain equipment of the Company that is lease to customers under non-cancellable operating leases, represents the initial term that such leases generally have.
Stock Plan 2007 [Member]
Represents 2007 Stock Plan
Thermal Process [Member]
Represents thermal process.
Stock Plan 2014 [Member]
Represents the 2014 Stock Plan.
CASH FLOWS FROM FINANCING ACTIVITIES
us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Other
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
intt_OperatingLeaseRightOfUseAssetAmortization
Operating Lease, Right-of-Use Asset, Amortization
The amount of amortization expense during the period for right of use asset under operating lease.
us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Changes in valuation allowance
Defense/ Aerospace [Member]
Represents defense/ aerospace.
Stock Repurchase Plan [Text Block]
The entire disclosure for stock repurchase plan.
Lessee, Operating Lease, Scheduled Base Rent Payments [Table Text Block]
The tabular disclosure of scheduled base rent payments of operating lease of the lessee.
Thermal Products and Mechanical Products [Member]
Represents information pertaining to both the Thermal Products and Mechanical Products segments.
Corporate, Non-Segment [Member]
11/1/2021 – 10/31/2022
Amount of lessee's base monthly rent for operating lease, due in months thirteen through twenty-four after renewal.
12/1/2020 – 10/31/2021
Amount of lessee's base monthly rent for operating lease, due in months two through twelve after renewal.
11/1/2020 – 11/30/2020
Amount of lessee's base monthly rent for operating lease, due first month after renewal.
11/1/2023 – 10/31/2024
Amount of lessee's base monthly rent for operating lease, due in months thirty-seven through forty-eight after renewal.
11/1/2022 – 10/31/2023
Amount of lessee's base monthly rent for operating lease, due in months twenty-five through thirty-six after renewal.
11/1/2025 – 11/30/2025
Amount of lessee's base monthly rent for operating lease, due in month sixty-one after renewal.
11/1/2024 – 10/31/2025
Amount of lessee's base monthly rent for operating lease, due in months forty-nine through sixty after renewal.
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
Schedule of Carrying Value of Finite-lived Intangible Assets [Table Text Block]
Tabular disclosure of the carrying value of finite-lived intangible assets.
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.
intt_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiabilityIncludingEarnoutPayable
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Including Earnout Payable
Amount of increase (decrease) in the value of a contingent consideration liability including earnout payable.
us-gaap_IncomeTaxReconciliationNondeductibleExpense
Nondeductible expenses
Class of Stock [Axis]
us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Restricted stock
Schedule of Weighted Average Number of Shares [Table Text Block]
Operating Segments [Member]
us-gaap_IncomeTaxReconciliationTaxCredits
Current year tax credits (foreign and research)
us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Domestic tax expense (benefit), net of Federal benefit
us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Foreign income tax rate differences