Document And Entity Information
Note To Financial Statement Details Textual
Significant Accounting Policies
Note 3 - Acquisitions
Income tax provision
Total income tax provision
Provision for income taxes
Note 4 - Revenue
lpth_DisposalGroupIncludingDiscontinuedOperationConsiderationMinimumYearlyPayment
Disposal Group, Including Discontinued Operation, Consideration, Minimum Yearly Payment
Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.
Note 5 - Inventories, Net
Note 6 - Property and Equipment, Net
Note 7 - Goodwill and Intangible Assets
Note 9 - Income Taxes
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives
Note 11 - Earnings (Loss) Per Share
Note 13 - Leases
Note 14 - Loans Payable
Note 16 - Foreign Operations
Note 17 - Segment Reporting
Note 3 - Acquisitions - Consideration Transferred (Details)
Note 3 - Acquisitions - Assets Acquired and Liabilities Assumed (Details)
Note 3 - Acquisitions - Intangible Assets (Details)
Retirement Plan Name [Domain]
Note 3 - Acquisitions - Pro Forma Information (Details)
us-gaap_IncreaseDecreaseInAccountsReceivable
Trade accounts receivable
Note 4 - Revenue - Revenue by Product Group (Details)
Defined Contribution Plan [Text Block]
Note 5 - Inventories, Net - Inventories (Details)
Retirement Plan Name [Axis]
Note 6 - Property and Equipment, Net - Property and Equipment (Details)
Accounts payable and accrued liabilities
Note 7 - Goodwill and Intangible Assets - Goodwill (Details)
Note 7 - Goodwill and Intangible Assets - Intangible Assets (Details)
Note 7 - Goodwill and Intangible Assets - Future Amortization of Intangibles (Details)
Note 9 - Income Taxes - Income (Loss) before Income Taxes (Details)
Note 9 - Income Taxes - Components of Provision for Income Tax (Details)
Note 9 - Income Taxes - Reconciliation of Income Tax (Details)
Note 9 - Income Taxes - Reconciliation of Income Tax (Details) (Parentheticals)
Business Description and Basis of Presentation [Text Block]
Note 9 - Income Taxes - Cash Paid for Income Taxes (Details)
Note 9 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives - Summary of Plans (Details)
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives - Valuation Assumptions (Details)
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives - Award Activity (Details)
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives - Intrinsic and Fair Values of Awards (Details)
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives - Unrecognized Compensation Cost (Details)
Note 10 - Compensatory Equity Incentive Plan and Other Equity Incentives - Stock-based Compensation Expense (Details)
Note 11 - Earnings (Loss) Per Share - Computation of Earnings per Share (Details)
Note 11 - Earnings (Loss) Per Share - Securities Excluded from Earnings per Share (Details)
Note 13 - Leases - Lease Expense (Details)
Note 13 - Leases - Supplemental Balance Sheet Information (Details)
Note 13 - Leases - Lease Term and Discount Rate Information (Details)
Note 13 - Leases - Supplemental Cash Flow Information (Details)
Note 13 - Leases - Maturities of Lease Liabilities (Details)
Note 14 - Loans Payable - Future Maturities of Loans Payable (Details)
Note 16 - Foreign Operations - Revenues by Country (Details)
Note 16 - Foreign Operations - Long-lived Assets by Country (Details)
Note 17 - Segment Reporting - Reconciliation of Income from Segments (Details)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
Interest income (expense), net
us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
Leasehold Improvements [Member]
us-gaap_IncreaseDecreaseInInventories
Inventories
us-gaap_SharesOutstanding
Balances (in shares)
Balances (in shares)
us-gaap_PreferredStockDividendRatePercentage
Preferred Stock, Dividend Rate, Percentage
Segment Reporting [Text Block]
Deferred taxes
Amount of change in deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
Preferred stock: Series D, $0.01 par value, voting; 500,000 shares authorized; none issued and outstanding
Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block]
us-gaap_Liabilities
Total liabilities
Current deposits
lpth_BusinessCombinationRecognizedLiabilityAssumedDepositsCurrent
Amount of liability assumed in business combination and recognized at acquisition date, classified as deposits and current.
Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block]
lpth_StockIssuedDuringPeriodSharesExistingSharesResold
Stock Issued During Period, Shares, Existing Shares Resold (in shares)
Number of existing shares resold to a different entity during the period.
lpth_PaymentTaxWithholding
Payment, Tax Withholding
Amount of cash outflow to satisfy grantee's tax withholding obligation.
Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block]
lpth_PaymentsToAcquireBusinessesNetOfAdjustmentsAndClawback
Acquisition of G5 Infrared
The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price, net of adjustments and clawback.
lpth_StockIssuedDuringPeriodSharesNewIssuesAndExistingSharesResold
Stock Issued During Period, Shares, New Issues and Existing Shares Resold (in shares)
Number of new stock issued during the period and existing shares resold.
us-gaap_LiabilitiesAndStockholdersEquity
Total liabilities, convertible preferred stock and stockholders’ equity
Segment Reporting [Table]
us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Prepaid expenses and deposits
us-gaap_SellingAndMarketingExpense
Sales & marketing
Selling, general and administrative
Lessee, Lease, Description [Table]
Lease Contractual Term [Axis]
Lease Contractual Term [Domain]
Changes in operating assets and liabilities, net of acquisitions:
Series D Preferred Stock [Member]
Series B Preferred Stock [Member]
Series C Preferred Stock [Member]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Change in cash and cash equivalents
Series A Preferred Stock [Member]
Effect of exchange rate on cash and cash equivalents
Series F Preferred Stock [Member]
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block]
Operating right-of-use assets acquired in exchange for operating lease liabilities
Purchase of equipment through finance lease arrangements
Financing cash used for finance leases
Repayment of finance lease obligations
Non-options, oustanding (in shares)
Non-options, oustanding (in shares)
Non-options, outstanding (in shares)
Non-options, Granted (in shares)
Granted, grant date fair values (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Non-options, Cancelled/Forfeited (in shares)
us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization
Finance Lease, Right-of-Use Asset, Accumulated Amortization
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
Non-options
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Non-options, Exercised (in shares)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
Thereafter, operating lease
us-gaap_RepaymentsOfDebt
Repayments of Debt
Property and equipment, net
Total property and equipment, net
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total future minimum payments, operating lease
Total property and equipment
us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization
Less accumulated depreciation and amortization
us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent
Finance leases
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Operating leases
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
June 30, 2027, operating lease
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
Options, forfeited (in shares)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive
June 30, 2031, operating lease
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Stock Options
Award Shares Authorized (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
us-gaap_ProceedsFromIssuanceOfDebt
Proceeds from Issuance of Debt
Available for Issuance (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)
Schedule of Maturities of Long-Term Debt [Table Text Block]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
June 30, 2029, operating lease
Options, outstanding (in shares)
Options, outstanding (in shares)
Options, outstanding (in shares)
Commitments and Contingencies Disclosure [Text Block]
Nature of Expense [Axis]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
June 30, 2028, operating lease
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Options, outstanding, weighted average exercise price (in dollars per share)
Options, outstanding, weighted average exercise price (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Stock Options
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
June 30, 2030, operating lease
Common stock, issued (in shares)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Common stock, outstanding (in shares)
Award Type [Domain]
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Weighted-average risk-free interest rate
Common stock, authorized (in shares)
Common Stock, Shares Authorized (in shares)
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Weighted-average expected volatility
Dividend yields
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Common stock: Class A, $0.01 par value, voting; 94,500,000 shares authorized; 69,963,045 and 42,949,307 shares issued and outstanding
Depreciation of lease assets
Schedule of Inventory, Current [Table Text Block]
us-gaap_ForeignEarningsRepatriated
Foreign Earnings Repatriated
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
us-gaap_FinanceLeaseLiability
Present value of finance lease liabilities
us-gaap_PolicyTextBlockAbstract
Accounting Policies
Current:
Deferred:
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_TableTextBlock
Notes Tables
Loans payable, less current portion
us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive
Thereafter, finance lease
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive loss
Finance lease obligation, less current portion
Finance leases
us-gaap_FinanceLeaseLiabilityPaymentsDue
Total future minimum payments, finance lease
Loans payable, current portion
Less current portion
Finance lease obligation, current portion
Finance leases
us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Less imputed interest, finance lease
us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree
June 30, 2029, finance lease
us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo
June 30, 2028, finance lease
Concentration Risk [Table]
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive
June 30, 2031, finance lease
Subsequent Events [Text Block]
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour
June 30, 2030, finance lease
Concentration Risk Type [Axis]
us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
June 30, 2027, finance lease
Concentration Risk Disclosure [Text Block]
Interest on lease liabilities
Operating cash used for finance leases
Significant Accounting Policies [Text Block]
Operating cash used for operating leases
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less imputed interest, operating lease
Operating lease liabilities, noncurrent
Operating leases
us-gaap_OperatingLeaseLiability
Present value of operating lease liabilities
Operating lease liabilities, current
Operating leases
Accounts Receivable [Member]
Concentration Risk Type [Domain]
Business Combination, Contingent Consideration, Type [Domain]
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
June 30, 2028
us-gaap_LongTermDebtNoncurrent
Non-current portion
Business Combination, Contingent Consideration, Type [Axis]
us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
June 30, 2027
CHINA
Income Tax Jurisdiction, Domestic State and Local [Member]
us-gaap_LongTermDebt
Total payments
Stock Conversion Description [Axis]
Statement of Stockholders' Equity [Abstract]
Conversion of Stock, Name [Domain]
Statement of Cash Flows [Abstract]
UNITED KINGDOM
Stockholders’ equity:
Equity Components [Axis]
Share-Based Payment Arrangement [Policy Text Block]
Equity Component [Domain]
us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)
Equity [Text Block]
AOCI Attributable to Parent [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Cost of sales
Cost of goods sold
Inventory write-offs to allowance
Inventory Write-down
ISRAEL
Subsequent Event Type [Domain]
Subsequent Event [Table]
Subsequent Event Type [Axis]
Public Placement [Member]
A public placement is a direct offering of securities to a limited number of sophisticated investors such as insurance companies, pension funds, mezzanine funds, stock funds and trusts.
Sale of Stock [Axis]
lpth_SharebasedPaymentArrangementNonvestedAwardCostNotYetRecognizedYearThree
June 30, 2029
Amount of cost not yet recognized for nonvested award under share-based payment arrangement in the third fiscal year.
Cost of Goods and Service [Policy Text Block]
Exercise of warrants (in shares)
The number of shares issued during the period for the exercise of warrants.
Exercise of warrants
The value of the stock issued during the period for the exercise of warrants.
lpth_DebtInstrumentIncreasedRedemptionAmountPercent
Debt Instrument, Increased Redemption Amount, Percent
Represents the increase percent of redemption amount.
lpth_ProceedsFromPublicOfferingNet
Proceeds from Public Offering, Net
Represents the net proceeds from the public offering.
Intangible Asset and Goodwill [Text Block]
LATVIA
lpth_OperatingLeaseRightofuseAssetPeriodicIncreaseReduction
Change in operating lease assets and liabilities
Represents the periodic increase (reduction) for the operating lease assets and liabilities.
Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block]
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
Share-Based Payment Arrangement, Nonvested Award, Cost [Table Text Block]
Share-Based Payment Arrangement, Option [Member]
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Supplemental disclosure of cash flow information:
Current liabilities:
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current
us-gaap_LiabilitiesCurrent
Total current liabilities
us-gaap_CurrentFederalTaxExpenseBenefit
Federal tax
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
State
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
Customer Concentration Risk [Member]
Lease, Cost [Table Text Block]
Tax Credit Carryforward [Axis]
Tax Credit Carryforward, Name [Domain]
Customer Relationships [Member]
Revenue Benchmark [Member]
Other Commitments [Table]
Lessee, Leases [Policy Text Block]
us-gaap_PreferredStockConvertibleConversionPrice
Preferred Stock, Convertible, Conversion Price (in dollars per share)
Debt Disclosure [Text Block]
Segment Reporting, Policy [Policy Text Block]
Debt Conversion, Name [Domain]
Debt Conversion Description [Axis]
Use of Estimates, Policy [Policy Text Block]
Employee Stock Purchase Plan
Issuance of preferred stock under private equity placement, net of fees
Lessee, Operating Leases [Text Block]
Exercise of stock options, RSUs & RSAs, net
UNITED STATES
us-gaap_DebtInstrumentCarryingAmount
Long-Term Debt, Gross
Conversion of Series G Preferred to Common
Stock Issued During Period, Value, Conversion of Convertible Securities
us-gaap_DebtInstrumentFaceAmount
Debt Instrument, Face Amount
Preferred cumulative dividends plus accretion
us-gaap_StockIssuedDuringPeriodValueStockDividend
Issuance of common stock for acquisition
Stock Issued During Period, Value, Acquisitions
Current assets:
us-gaap_AssetsCurrent
Total current assets
Exercise of stock options, RSUs & RSAs, net (in shares)
Employee Stock Purchase Plan (in shares)
Trade Names [Member]
Issuance of preferred stock under private equity placement, net of fees (in shares)
Stock Issued During Period, Shares, New Issues (in shares)
Restricted Stock Units (RSUs) [Member]
Conversion of Series G Preferred to Common (in shares)
Debt Instrument, Name [Domain]
Issuance of common stock for acquisition (in shares)
Stock Issued During Period, Shares, Acquisitions (in shares)
us-gaap_DebtInstrumentMaturityDate
Debt Instrument, Maturity Date
us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Options, exercised (in shares)
us-gaap_DebtInstrumentInterestRateStatedPercentage
Debt Instrument, Interest Rate, Stated Percentage
us-gaap_DebtInstrumentInterestRateEffectivePercentage
Debt Instrument, Interest Rate, Effective Percentage
us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings
Preferred cumulative dividends plus accretion
Schedule of Long-Term Debt Instruments [Table]
Debt Instrument [Axis]
us-gaap_GoodwillAndIntangibleAssetImpairment
Intangible Asset, Including Goodwill, Impairment Loss
Cash flows from operating activities:
Cash flows from investing activities:
us-gaap_InventoryRawMaterialsNetOfReserves
Inventory, Raw Materials, Net of Reserves
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash used in operating activities
Cash flows from financing activities:
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash used in investing activities
us-gaap_PaymentsOfDebtIssuanceCosts
Payments of Debt Issuance Costs
us-gaap_SharesIssuedPricePerShare
Shares Issued, Price Per Share (in dollars per share)
Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block]
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by financing activities
Share-Based Payment Arrangement, Activity [Table Text Block]
us-gaap_DebtInstrumentRedemptionPricePercentage
Debt Instrument, Redemption Price, Percentage
Developed Technology Rights [Member]
Accounting Policies [Abstract]
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Federal tax
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
us-gaap_DeferredIncomeTaxExpenseBenefit
Total deferred
Change in fair value of warrant liability
Change in fair value of warrant liability
Net loss
Net loss
Net loss
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net loss attributable to stockholders
us-gaap_DebtConversionConvertedInstrumentWarrantsOrOptionsIssued1
Debt Conversion, Converted Instrument, Warrants or Options Issued (in shares)
us-gaap_DebtConversionOriginalDebtAmount1
Debt Conversion, Original Debt, Amount
Extinguishment of debt in exchange for common stock, preferred stock, warrants and a note
us-gaap_DebtConversionConvertedInstrumentSharesIssued1
Debt Conversion, Converted Instrument, Shares Issued (in shares)
us-gaap_ConversionOfStockSharesConverted1
Conversion of Stock, Shares Converted (in shares)
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State
us-gaap_ConversionOfStockSharesIssued1
Conversion of Stock, Shares Issued (in shares)
Capitalized R&D expenses
Inventories
us-gaap_DeferredTaxAssetsGross
Gross deferred tax assets
us-gaap_BusinessCombinationContingentConsiderationLiability
Business Combination, Contingent Consideration, Liability
Proceeds from sale of common stock from Employee Stock Purchase Plan
Net operating loss carryforwards
Accounting Standards Update and Change in Accounting Principle [Table]
us-gaap_DeferredTaxAssetsNet
Deferred Tax Assets, Net of Valuation Allowance
Total deferred tax assets
Supplemental disclosure of non-cash investing & financing activities:
R&D and other credits
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Number of Shares Per Employee (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
Stock Options
Accrued expenses and other
Options, exercisable (in shares)
Options, exercisable, weighted average exercise price (in dollars per share)
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Stock-based compensation
Vesting [Axis]
Other income (expense):
us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Assets, Valuation Allowance
Valuation allowance for deferred tax assets
Vesting [Domain]
us-gaap_NonoperatingIncomeExpense
Total other income (expense), net
us-gaap_DividendsPreferredStock
Preferred cumulative dividends plus accretion
us-gaap_DeferredTaxLiabilities
Deferred Tax Liabilities, Net
Net deferred tax assets (liabilities)
us-gaap_LesseeFinanceLeaseTermOfContract1
Lessee, Finance Lease, Term of Contract (Year)
us-gaap_DeferredTaxLiabilitiesLeasingArrangements
Right-of-use asset
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Intangible assets
us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1
Finance leases (Year)
Document Type
Document Information [Line Items]
us-gaap_LesseeOperatingLeaseTermOfContract
Lessee, Operating Lease, Term of Contract (Year)
Document Annual Report
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Operating leases (Year)
Document Information [Table]
us-gaap_IncreaseDecreaseInOtherCurrentAssets
Other current assets
us-gaap_BusinessAcquisitionsProFormaRevenue
Revenue
Entity Interactive Data Current
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares (in shares)
Document Transition Report
Number of shares used in per share calculation (diluted) (in shares)
Diluted number of shares (in shares)
Document Financial Statement Error Correction [Flag]
Number of shares used in per share calculation (basic) (in shares)
Basic number of shares (in shares)
us-gaap_DebtInstrumentTerm
Debt Instrument, Term (Year)
Stock-based compensation
Issuance of common stock for acquisition
us-gaap_StockIssued1
EMEA [Member]
Income Tax Jurisdiction [Axis]
ICFR Auditor Attestation Flag
Document Fiscal Period Focus
Customer [Domain]
Document Fiscal Year Focus
Amendment Flag
Common Stock [Member]
Change in fair value of acquisition liabilities
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)
Document Period End Date
Property, Plant, and Equipment [Text Block]
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
RSUs
Long-Lived Asset, Class [Domain]
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested
Non-options
Legal Entity [Axis]
Options, granted (in shares)
Construction in Progress [Member]
Entity File Number
Entity Tax Identification Number
Entity [Domain]
Entity Central Index Key
Entity Registrant Name
Entity Well-known Seasoned Issuer
Entity Current Reporting Status
Entity Voluntary Filers
Entity Incorporation, State or Country Code
Current Fiscal Year End Date
Entity Public Float
Accounts receivable
Inventory
Prepaid expenses and other current assets
New product development
New product development
Entity Filer Category
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
Total assets acquired
Entity Shell Company
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
Total liabilities assumed
Entity Emerging Growth Company
Entity Small Business
us-gaap_OperatingIncomeLoss
Operating loss
Other intangible assets
Accounts payable
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Other assets
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Property and equipment
Intangible asset acquired
us-gaap_PreferredStockDividendsIncomeStatementImpact
Accretion of dividends on Series G preferred
us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount
Options, unexercisable (in shares)
GILTI, percent
us-gaap_BusinessCombinationConsiderationTransferred1
Business Combination, Consideration Transferred
Fair value of consideration transferred
Entity Address, State or Province
Entity Address, City or Town
Inventory, Current [Table]
Entity Address, Address Line One
Order or Production Backlog [Member]
Options, unexercisable, weighted average exercise price (in dollars per share)
City Area Code
us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
Business Combination, Acquiree's Revenue since Acquisition Date, Actual
us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual
Local Phone Number
Entity Address, Postal Zip Code
GILTI
Preferred Stock [Member]
Title of 12(b) Security
Security Exchange Name
Trading Symbol
Assets:
Liabilities:
Net working capital adjustment
Entity Common Stock, Shares Outstanding
Earnings Per Share [Text Block]
Other current assets
us-gaap_BusinessCombinationAcquisitionRelatedCosts
Business Combination, Acquisition-Related Cost, Expense
Scenario [Axis]
Scenario [Domain]
Operating lease liabilities, noncurrent
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation
Equity portion of consideration
Liabilities incurred
Other expense, net
us-gaap_Assets
Total assets
Auditor Firm ID
Auditor Name
Geographical [Domain]
Auditor Location
Geographical [Axis]
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
Loss per common share (diluted) (in dollars per share)
Customer [Axis]
Depreciation and amortization
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Consolidation, Policy [Policy Text Block]
Disposal Group Name [Domain]
Intangible Asset, Finite-Lived [Table Text Block]
Intangible Asset, Finite-Lived [Table]
Disposal Group Name [Axis]
us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Disposal Group, Including Discontinued Operation, Consideration
Business Combination [Text Block]
Deferred tax liabilities:
Award Timing MNPI Disclosure [Text Block]
ecd_AwardTmgMnpiCnsdrdFlag
Award Timing MNPI Considered [Flag]
us-gaap_PaymentsOfDividends
Payments of Dividends
Stock, Class of Stock [Table]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
Commitments and Contingencies - Note 15
Statistical Measurement [Axis]
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Trading Arrangements, by Individual [Table]
Material Terms of Trading Arrangement [Text Block]
ecd_InsiderTrdPoliciesProcAdoptedFlag
Insider Trading Policies and Procedures Adopted [Flag]
Long-Lived Asset, Including Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block]
Comprehensive Income, Policy [Policy Text Block]
Minimum [Member]
Insider Trading Policies and Procedures [Line Items]
Statistical Measurement [Domain]
Maximum [Member]
us-gaap_SharePrice
Share Price (in dollars per share)
Over-Allotment Option [Member]
Foreign
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
United States
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Business Combination, Contingent Consideration [Table Text Block]
Counterparty Name [Axis]
Series G Convertible Preferred Stock; $0.01 par value; 44,000 shares authorized; 6,492 and 24,956 shares issued and outstanding
Changes in valuation allowance, percent
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective Income Tax Rate Reconciliation, Percent
Income tax rate, percent
Current tax at U.S. statutory rate, percent
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Options, forfeited, weighted average exercise price (in dollars per share)
Latvia - statutory rate differences, percent
Other foreign tax effects, percent
Options, granted, weighted average exercise price (in dollars per share)
Options, exercised, weighted average exercise price (in dollars per share)
Income Tax Jurisdiction [Domain]
Nondeductible/nontaxable items, percent
State income taxes, net of federal benefit (1), percent
Counterparty Name [Domain]
Other adjustments, percent
Non-options, outstanding, remaining contract (Year)
Award Type [Axis]
Adjustments to reconcile net loss to net cash used in operating activities:
Plan Name [Axis]
Plan Name [Domain]
Defined Benefit Plan [Table]
Share-Based Payment Arrangement, Expense
Consolidation Items [Axis]
Stock-based compensation on stock options, RSUs & RSAs, net
Subsequent Event [Member]
Consolidation Items [Domain]
Share-Based Payment Arrangement [Text Block]
Preferred stock, issued (in shares)
Preferred Stock, Shares Issued (in shares)
Useful life, finite-lived intangible assets (Year)
Useful life, finite-lived intangible assets (Year)
Finite-Lived Intangible Asset, Useful Life (Year)
Europe [Member]
Preferred stock, outstanding (in shares)
Preferred Stock, Shares Outstanding (in shares)
Asia [Member]
Preferred stock, authorized (in shares)
Preferred Stock, Shares Authorized (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate
Preferred stock, par value (in dollars per share)
Preferred Stock, Par or Stated Value Per Share (in dollars per share)
New Accounting Pronouncements, Policy [Policy Text Block]
Antidilutive Securities, Name [Domain]
Statement [Table]
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
Prepaid expenses and deposits
us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Intangible assets
Business Combination, Consideration Transferred, Equity Interest, Type [Axis]
State Administration of Taxation, China [Member]
us-gaap_ForeignCurrencyTransactionGainLossAfterTax
Gain (Loss), Foreign Currency Transaction, after Tax
Shares issued as compensation
Shares issued as compensation (in shares)
Product and Service [Domain]
Product and Service [Axis]
Useful life (Year)
Property, Plant and Equipment, Useful Life (Year)
Consolidated Entities [Axis]
Consolidated Entities [Domain]
Statement [Line Items]
Disallowed interest expense
Private Placement [Member]
Reclassification of warrant liability
Amount of increase in additional paid in capital (APIC) resulting from the reclassification of warrant liabilities.
Conversion of Debt into Common Stock, Preferred Stock, Warrants, and a Note [Member]
Conversion of Debt into Common Stock, Preferred Stock, Warrants, and a Note
Accrual of earnout consideration for acquisition
The accrual of earnout consideration related to the acquisition of a business.
us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from Issuance or Sale of Equity
June 30, 2028
Fair Value of Financial Instruments, Policy [Policy Text Block]
June 30, 2029
June 30, 2027
us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)
Proceeds from issuance of common stock under public equity placement
Proceeds from Issuance of Common Stock
Accounts payable
Proceeds from issuance of preferred stock under private equity placement, net of fees
Cash, Cash Equivalents, and Restricted Cash Benchmark [Member]
Cash, Cash Equivalents, and Restricted Cash Benchmark
After June 30, 2031
June 30, 2030
June 30, 2031
Proceeds from issuance of warrants under private equity placement, net of fees
VAT Policy [Policy Text Block]
The policy on VAT.
lpth_VatReceivablesPayables
VAT Receivables (Payables)
VAT receivables (payables) during the period.
Disposal Group Classification [Axis]
Proceeds from issuance of common stock under private equity placement, net of fees
lpth_VatRate
VAT Rate
The VAT rate.
Disposal Group Classification [Domain]
lpth_CapitalStockSharesAuthorized
Capital Stock, Shares Authorized (in shares)
The number of shares authorized of both common and preferred stock.
Accrued liabilities
Borrowings on loans payable
lpth_AccruedWithholdingTaxes
Accrued Withholding Taxes
Accrued withholding taxes.
G5 Plan [Member]
G5 Plan
LightPath Plan [Member]
LightPath Plan
Accrued payroll and benefits
lpth_PaymentTaxWithholdingDividends
Payment, Tax Withholding, Dividends
Amount of cash outflow to satisfy grantee's tax withholding obligation for dividends.
Common Class E-1, E-2, and E-3 [Member]
Common Class E-1, E-2, and E-3
Options, outstanding, weighted average remaining contract (Year)
lpth_LesseeOperatingLeaseAnnualRentIncreasePercent
Lessee, Operating Lease, Annual Rent Increase, Percent
The annual percent increase in rent.
Orlando, FL Lease [Member]
Orlando, FL Lease
lpth_DefinedContributionPlanEmployerMatchingContributionPercentOfEmployeesFirstFourPercentMatched
Defined Contribution Plan, Employer Matching Contribution, Percent of Employee's First Four Percent Matched
Percentage employer matches of the employee's percentage contribution matched.
lpth_DefinedContributionPlanEmployerMatchingContributionPercentOfEmployeesFirstTwoPercentMatched
Defined Contribution Plan, Employer Matching Contribution, Percent of Employee's First Two Percent Matched
Percentage employer matches of the employee's percentage contribution matched.
Options, exercisable, weighted average remaining contract (Year)
lpth_NumberOfCustomers
Number of Customers
The number of customers.
Customer One [Member]
Customer One
Three Customers [Member]
Three Customers
Weighted-average expected term, in years (Year)
Acquisition financing
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 acquisition financing.
Earnout to be Paid in Shares [Member]
Represents earnout to be paid in shares.
lpth_DeferredTaxLiabilitiesDepreciationAndOther
Depreciation and other
Amount of deferred tax liability attributable to taxable temporary differences classified as other and depreciation.
Earnout to be Paid in Cash [Member]
Represents earnout to be paid in cash.
Lease liability
Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, due to lease liabilities.
Customer Three [Member]
Customer Three
Selling Expense [Member]
Represents selling expense.
Customer Two [Member]
Customer Two
NOL expiration and adjustments
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 NOL expiration and adjustments.
Amorphous Materials, LLC (“AML”) [Member]
Represents Amorphous Materials, LLC (“AML”).
Federal research and development credit expiration
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 the expiration tax credits.
Class A Warrants [Member]
Class A Warrants
Class A SPA [Member]
Class A SPA
Common Class A, 2 [Member]
Common Class A, 2
Income Tax Jurisdiction, Domestic Federal [Member]
lpth_ClassOfWarrantOrRightPercentOfSharesPurchaseable
Class of Warrant or Right, Percent of Shares Purchaseable
The percent of shares purchaseable via warrant.
lpth_OperatingLossCarryforwardsNotSubjectToExpiration
Operating Loss Carryforwards, Not Subject to Expiration
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.
lpth_SharebasedPaymentArrangementNonvestedAwardCostNotYetRecognizedYearFour
June 30, 2030
Amount of cost not yet recognized for nonvested award under share-based payment arrangement expected to be recognized in year four.
Proceeds from sale of equipment
lpth_OperatingLossCarryforwardsSubjectToExpiration
Operating Loss Carryforwards, Subject to Expiration
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.
lpth_SharebasedPaymentArrangementNonvestedAwardCostNotYetRecognizedYearFive
June 30, 2031
Amount of cost not yet recognized for nonvested award under share-based payment arrangement, expected to be recognized in year five.
Class A Common Stock Per Tranche [Member]
Represents Class A Common Stock per tranche.
lpth_ConversionOfStockPercentageOfOutstandingStockMaximum
Conversion of Stock, Percentage of Outstanding Stock Maximum
aximum number of shares that may be issued in accordance with the conversion of stock.
Contingent Consideration Payments, Class A Common Stock [Member]
represents Class A Common Stock for contingent consideration payments.
Conversion of Bridge Note into Class A Common Stock [Member]
Conversion of Bridge Note into Class A Common Stock
Acquisition Note Stock [Member]
Acquisition Note Stock
Conversion of Bridge Note into Class A Warrants [Member]
Conversion of Bridge Note into Class A Warrants
Conversion of Bridge Note into Series G Convertible Preferred Stock [Member]
Conversion of Bridge Note into Series G Convertible Preferred Stock
us-gaap_PaymentsOfFinancingCosts
Loan issuance costs
lpth_ConversionOfStockExchangeCap
Conversion of Stock, Exchange Cap (in shares)
The maximum amount of shares that may be attained in the conversion of stock.
Lytton Buyers [Member]
Lytton Buyers
Acquisition Note Warrants [Member]
Acquisition Note Warrants
Conversion of Series G Preferred to Common Stock [Member]
Represents the conversion of Series G preferred to common stock.
Intangible Asset, Finite-Lived, Class [Axis]
Within Six Months [Member]
Within Six Months
Within Twelve Months [Member]
Within Twelve Months
Intangible Asset, Finite-Lived, Class [Domain]
Class of Warrant or Right [Axis]
Twenty Twenty Five ESPP [Member]
Twenty Twenty Five ESPP
Class of Warrant or Right [Domain]
lpth_SharebasedCompensationArrangementBySharebasedPaymentAwardMaximumValueOfSharesPerEmployee
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Value of Shares Per Employee
The highest value of shares an employee can purchase under the plan per period.
Proceeds from exercise of stock options
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
Net assets acquired
Foreign Currency Disclosure [Text Block]
Income Tax Jurisdiction, Foreign [Member]
Options, unexercisable, weighted average remaining contract (Year)
Weighted average remaining contractual term for option awards nonvested, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
Property and equipment, gross
Provision for credit losses
Deferred tax assets, net
Property, Plant, and Equipment [Policy Text Block]
Furniture and Fixtures [Member]
Stock-based compensation on stock options, RSUs & RSAs
Deferred tax liabilities, net
Temporary equity, issued (in shares)
Temporary equity, outstanding (in shares)
Temporary equity, authorized (in shares)
Trade accounts receivable, net of allowance
Accrued liabilities, noncurrent
Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the noncurrent portion of the liabilities.
lpth_BusinessCombinationAggregateEarnoutPayments
Business Combination, Aggregate Earnout Payments
The aggregate value of earnout payments in the business combination.
G5 Infrared [Member]
G5 Infrared
lpth_BusinessCombinationAdditionalCashConsiderationPercentOfEarnoutPayment
Business Combination, Additional Cash Consideration, Percent of Earnout Payment
The additional cash consideration, as a percent of the earnout payment, that will be issued by the acquirer if certain targets are met in the business acquisition.
lpth_BusinessCombinationAggregateCommonStockIssuedPercent
Business Combination, Aggregate Common Stock Issued, Percent
The aggregate percent of common stock that will be issued by the acquirer if certain targets are met in the business acquisition.
lpth_BusinessCombinationAcquireesMinimumRevenueForClawbackProvision
Business Combination, Acquiree's Minimum Revenue for Clawback Provision
The minimum revenue that, if the acquiree does not meet, will trigger a clawback provision.
Series G Purchasers Warrants [Member]
Series G Purchasers Warrants
Acquisition Notes [Member]
Acquisition Notes
Operating lease liabilities, current
lpth_BusinessCombinationRecognizedLiabilityAssumedOperatingLeaseLiabilities
Amount of operating lease liabilities assumed in business combination and recognized at acquisition date, classified as current.
us-gaap_GainLossOnSaleOfPropertyPlantEquipment
(Gain) loss on disposal of property and equipment
(Gain) loss on disposal of equipment
Accrued liabilities
lpth_BusinessCombinationRecognizedLiabilityAssumedAccruedLiabilities
Amount of accrued liabilities assumed in business combination and recognized at acquisition date, classified as current.
Other intangible assets, measurement period adjustment
Amount of increase (decrease) from measurement period adjustment of identifiable intangible assets representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax
Revenue clawback
Amount of consideration transferred, consisting of revenue clawbacks.
Finite-lived intangible assets, accumulated amortization
Operating lease right-of-use asset
Amount of operating lease right-of-use assets acquired in business combination and recognized at acquisition date.
lpth_NetAssetsAcquiredMeasurementPeriodAdjustment
Net assets acquired, measurement period adjustment
Amount of increase (decrease) from measurement period adjustment of net assets representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
Visimid Technologies [Member]
Visimid Technologies
lpth_BusinessCombinationProFormaInformationProFormaIncomeLossBeforeTax
Income before taxes
Amount, before tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period.
Deferred tax liabilities, noncurrent, measurement period adjustment
Amount of increase (decrease) from measurement period adjustment of deferred tax liabilities representing future economic benefit arising from other liabilities acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
lpth_AssetMeasurementPeriodAdjustment
Total assets acquired, measurement period adjustment
Amount of increase (decrease) from measurement period adjustment of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
lpth_LiabilityMeasurementPeriodAdjustment
Total liabilities assumed, measurement period adjustment
Amount of increase (decrease) from measurement period adjustment of liability representing future economic benefit arising from other liability acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
Engineering Services [Member]
Engineering Services
us-gaap_GeneralAndAdministrativeExpense
General & administrative
Assemblies and Modules [Member]
Assemblies and Modules
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before income taxes
Loss on extinguishment of debt
Gain (Loss) on Extinguishment of Debt
Loss on extinguishment of debt
Visible Components [Member]
Visible Components
Infrared Components [Member]
Infrared Components
Additional paid-in capital
ISP Optics Latvia [Member]
ISP Optics Latvia
Computer Equipment and Software [Member]
Computer Equipment and Software
Manufacturing Equipment [Member]
Manufacturing Equipment
LPOIZ [Member]
LPOIZ
Discontinued Operations, Disposed of by Sale [Member]
lpth_SharebasedCompensationArrangementBySharebasedPaymentAwardForfeitureRate
Share-based Compensation Arrangement by Share-based Payment Award, Forfeiture Rate
The forfeiture rate of in the share-based payment compensation arrangement.
lpth_SharebasedCompensationArrangementBySharebasedPaymentAwardDiscountFromMarketPrice
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price
Discount from fair value on purchase date that participants pay for shares.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Non-options, exercisable (in shares)
Number of fully vested and expected to vest exercisable non-options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.
Restricted Stock Awards and Restricted Stock Units [Member]
Restricted Stock Awards and Restricted Stock Units
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchase of property and equipment
Latvian State Revenue Service [Member]
Latvian State Revenue Service
2014 ESPP [Member]
2014 ESPP
SICP 2018 Omnibus Plan [Member]
SICP 2018 Omnibus Plan
Goodwill and Intangible Assets, Policy [Policy Text Block]
Non-US [Member]
lpth_SharebasedPaymentArrangementNonvestedAwardCostNotYetRecognizedYearTwo
June 30, 2028
Amount of cost not yet recognized for nonvested award under share-based payment arrangement in the second fiscal year.
lpth_SharebasedPaymentArrangementNonvestedAwardCostNotYetRecognizedYearOne
June 30, 2027
Amount of cost not yet recognized for nonvested award under share-based payment arrangement in the next fiscal year.
Non-options, unexercisable, remaining contract (Year)
Weighted average remaining contractual term for fully vested and expected to vest non-options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.
Non-options, unexercisable (in shares)
Number of fully vested and expected to vest non-options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.
Geographic Concentration Risk [Member]
lpth_NumberOfOperatingLeases
Number of Operating Leases
The number of operating leases.
lpth_FinanceLeaseCost
Total finance lease cost
Amount of finance lease cost.
us-gaap_GrossProfit
Gross profit
Series G Convertible Preferred Stock [Member]
Series G Convertible Preferred Stock
Credit Loss, Financial Instrument [Policy Text Block]
Series G Convertible Preferred Stock and Warrants [Member]
Series G Convertible Preferred Stock and Warrants
Goodwill, measurement period adjustment
Goodwill, Measurement Period Adjustment
Supplemental Cash Flow Information on Leases [Table Text Block]
Tabular disclosure of supplemental cash flow information on leases.
Lessee, Operating and Finance Lease, Liability, to be Paid, Maturity
Tabular disclosure of undiscounted cash flows of lessee's operating and finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position.
lpth_LeaseAssets
Total lease assets
Lease assets, of both operating and finance leases.
Supplemental Balance Sheet Information on Leases [Table Text Block]
Tabular disclosure on supplemental balance sheet information related to leases.
us-gaap_Depreciation
Depreciation
Lease, Terms and Discount Rates [Table Text Block]
Tabular disclosure on the terms and discount rates of both operating and finance leases.
lpth_LeaseLiabilities
Total lease liabilities
Lease liabilities, of both current and noncurrent operating and finance leases.
Class of Stock [Domain]
lpth_DebtInstrumentCovenantFixedChargeCoveredRatio
Debt Instrument, Covenant, Fixed Charge Covered Ratio
The minimum fixed charge covered ratio, as described by the debt instrument covenant.
lpth_DebtInstrumentCovenantTotalLeverageRatio
Debt Instrument, Covenant, Total Leverage Ratio
The maximum total leverage ratio, as described by the debt instrument covenants.
lpth_DebtInstrumentOriginalIssueDiscountPercent
Debt Instrument, Original Issue Discount, Percent
The original issue discount percent on the debt instrument.
Bridge Promissory Note [Member]
Bridge Promissory Note
lpth_DebtInstrumentInterestRateAtDefault
Debt Instrument, Interest Rate at Default
The rate that the debt instrument would accrue at interest at, in event of default.
lpth_DebtInstrumentCovenantMinimumEbitda
Debt Instrument, Covenant, Minimum EBITDA
The minimum value of EBITDA that, if not exceeded, will automatically convert the deb instrument.
Other Foreign Countries [Member]
Other Foreign Countries
lpth_RetainedEarningsAvailableForRepatriation
Retained Earnings Available for Repatriation
Amount of accumulated undistributed earnings available for repatriation.
us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
2023 Equipment Loan [Member]
2023 Equipment Loan
2020 Equipment Loan [Member]
2020 Equipment Loan
Temporary equity, par value (in dollars per share)
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Operating Segments [Member]
Series G Purchasers [Member]
Series G Purchasers
Earnout [Member]
Earnout
us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Impairment of Long-Lived Assets to be Disposed of
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table]
Allowance for doubtful accounts
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent
Long-lived assets
Income Statement [Abstract]
us-gaap_NumberOfOperatingSegments
Number of Operating Segments
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
Interest from amortization of loan issuance costs
Amortization of Debt Issuance Costs
Amortization of intangible assets
Amortization of intangible assets
Common Class A [Member]
Deferred tax assets:
Income Tax Disclosure [Text Block]
Restricted Stock [Member]
Rate change
Income Tax, Policy [Policy Text Block]
Latvia - statutory rate differences
Other foreign tax effects
Current tax at U.S. statutory rate
Nondeductible/nontaxable items
Issuance of warrants under private equity placement, net of fees
State income taxes, net of federal benefit (1)
Prior year true-ups
Other adjustments
us-gaap_RepaymentsOfLongTermDebt
Payments on loans payable
Statement of Financial Position [Abstract]
us-gaap_IncomeTaxReconciliationTaxCreditsResearch
Federal research and development and other credits
Deferred tax liabilities, noncurrent
Business Combination, Recognized Liability Assumed, Deferred Tax Liability
Income taxes paid
Total cash paid for income taxes (net of refunds)
Other assets
Operating expenses:
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
lpth_PolicyTable
us-gaap_IncomeTaxPaidForeignAfterRefundReceived
Foreign
Antidilutive securities (in shares)
Antidilutive Securities [Axis]
us-gaap_OperatingExpenses
Total operating expenses
Corporate
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
Antidilutive Security, Excluded EPS Calculation [Table]
Research Tax Credit Carryforward [Member]
Loss per common share (basic) (in dollars per share)
Research and Development Expense, Policy [Policy Text Block]
lpth_OperatingLossCarryforwardLimitationOnTaxableIncomePercent
Operating Loss Carryforward, Limitation on Taxable Income, Percent
The percent of limitation on the taxable income for the operating loss carryforward.
Effective Income Tax Rate Reconciliation [Table]
us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived
State
Tax Jurisdiction of Domicile [Extensible Enumeration]
us-gaap_IncomeTaxPaidFederalAfterRefundReceived
Federal tax
Intangible assets, net
Amortization of fair value of loan
Goodwill acquired during the year
Finite-lived intangible assets, net
Intangible Asset, Finite-Lived, after Accumulated Amortization
Finite-lived intangible assets, gross
Goodwill
Goodwill
Balance
Balance
Operating lease cost
Business Combination, Consideration Transferred, Equity Interest, Type [Domain]
us-gaap_LeaseCost
Total lease cost
Business Combination [Domain]
Business Combination [Axis]
Disaggregation of Revenue [Table Text Block]
Disaggregation of Revenue [Table]
Foreign currency translation adjustment
Business Combination [Table]
Business Combination, Pro Forma Information [Table Text Block]
Accrued liabilities
lpth_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedLiabilities
Amount of increase (decrease) from measurement period adjustment of accrued liabilities representing future economic benefit arising from other liabilities acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.
us-gaap_SegmentReportingOtherItemAmount
Other non-operating income (expense)(1)
us-gaap_InterestExpenseNonoperating
Interest (income) expense, net
Accumulated deficit
Revenue from Contract with Customer [Text Block]
us-gaap_DebtInstrumentConvertibleConversionPrice1
Debt Instrument, Convertible, Conversion Price (in dollars per share)
Class of Stock [Axis]
Revenue [Policy Text Block]
Property, Plant, and Equipment [Table]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share (in dollars per share)
Long-Lived Asset, Class [Axis]
Sale of Stock [Domain]
Cash and Cash Equivalents, Policy [Policy Text Block]
Cash and cash equivalents
Cash and Cash Equivalent
us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Outstanding (in shares)
us-gaap_ContractWithCustomerLiability
Contract with Customer, Liability
Cash consideration
Payments to Acquire Businesses, Gross
Acquisition
Debt, Policy [Policy Text Block]
Interest paid in cash
Inventory Disclosure [Text Block]
Finished goods
Interim Period, Costs Not Allocable [Domain]
lpth_EarningsPerShareBasicNetOfAccretion
Basic (in dollars per share)
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period net of accretion.
Inventories, net
Inventory, Net
lpth_EarningsPerShareDilutedNetOfAccretion
Diluted (in dollars per share)
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period net of accretion.
Securities Purchase Agreement [Member]
Securities Purchase Agreement
Lightpath [Member]
Lightpath
December Offering [Member]
December Offering
December Offering, Including Over-Allotment [Member]
December Offering, Including Over-Allotment
lpth_BusinessCombinationRemainingPotentialEarnout
Business Combination, Remaining Potential Earnout
The remaining potential earnout in the business combination.
Raw materials
New Hampshire Tax Authority [Member]
New Hampshire Tax Authority
Other State Tax Authorities [Member]
Other State Tax Authorities
Schedule of Income Taxes Paid [Table Text Block]
Tabular disclosure of income taxes paid.
us-gaap_StockholdersEquity
Total stockholders’ equity
Balances
Balances
lpth_IncomeTaxPaidForeignAfterRefundReceivedWithholding
China withholding tax
Amount, after income tax refund received, of cash paid to foreign tax jurisdiction for tax on income.
Goodwill [Table Text Block]
Federal research and development credit expiration, percent
Percentage 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 tax credit expiration.
Work in process
North Run [Member]
North Run
NOL expiration and adjustments, percent
Percentage 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 NOL expiration and adjustments.
Initial Rate [Member]
Initial Rate
Rate After 2 Million [Member]
Rate After 2 Million
lpth_DisposalGroupIncludingDiscontinuedOperationCostOfProductsIncrease
Disposal Group, Including Discontinued Operation, Cost of Products, Increase
The percent increase to the cost of products acquired from the disposal group.
us-gaap_PaymentForContingentConsiderationLiabilityOperatingActivities
Earnout payment for acquisition of G5, net of financing portion
lpth_DisposalGroupIncludingDiscontinuedOperationPercentSold
Disposal Group, Including Discontinued Operation, Percent Sold
The percent of the disposal group sold.
us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities
Payment for Contingent Consideration Liability, Financing Activities
Earnout payment for acquisition of G5, net of operating portion
lpth_DisposalGroupIncludingDiscontinuedOperationConsiderationInterestRateDefault
Disposal Group, Including Discontinued Operation, Consideration, Interest Rate, Default
Default interest rate of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.
lpth_DisposalGroupIncludingDiscontinuedOperationCostOfProducts
Disposal Group, Including Discontinued Operation, Cost of Products
The cost of products procured from the disposal group, as a percent of cost plus the given percent.
lpth_DisposalGroupIncludingDiscontinuedOperationConsiderationInterestRate
Disposal Group, Including Discontinued Operation, Consideration, Interest Rate
Interest rate of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.
us-gaap_InventoryValuationReserves
Allowance for obsolescence
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
us-gaap_FinanceLeaseRightOfUseAsset
Finance lease assets
Operating lease right-of-use assets
Operating lease assets
Rate After Full Payment [Member]
Rate After Full Payment
Property, Plant, and Equipment [Table Text Block]
Revenue
Revenue, net
Revenue
Inventory, Policy [Policy Text Block]
Changes in valuation allowance