75000 - Document - Document And Entity Information
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75010 - Statement - Consolidated Balance Sheets
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75020 - Statement - Consolidated Balance Sheets (Parentheticals)
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75030 - Statement - Consolidated Statements of Operations
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75040 - Statement - Consolidated Statements of Comprehensive Loss
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75050 - Statement - Consolidated Statements of Stockholders' Equity
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75060 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)
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75070 - Statement - Consolidated Statements of Cash Flows
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995457 - Disclosure - Cybersecurity Risk Management, Strategy, and Governance
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995467 - Disclosure - Operations
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995477 - Disclosure - Basis of Presentation and Significant Accounting Policies
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995487 - Disclosure - Recent Accounting Pronouncements
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995497 - Disclosure - Business Combination
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995507 - Disclosure - Revenue Recognition
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995517 - Disclosure - Fair Value Measurements
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995527 - Disclosure - Inventories
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995537 - Disclosure - Property and Equipment
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995547 - Disclosure - Goodwill and Intangible Assets
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995557 - Disclosure - Prepaid Expenses and Other
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995567 - Disclosure - Accrued and Other Liabilities
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995577 - Disclosure - Term Loans and Warrant Liabilities
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995587 - Disclosure - Leases
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995597 - Disclosure - Income Taxes
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995607 - Disclosure - Commitments and Contingencies
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995617 - Disclosure - Share-Based Compensation
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995627 - Disclosure - Stockholders' Equity
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995637 - Disclosure - Net Loss Per Share
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995647 - Disclosure - Segment Information
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995657 - Disclosure - Major Customers, Suppliers and Related Information
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995667 - Disclosure - Basis of Presentation and Significant Accounting Policies (Policies)
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995677 - Disclosure - Business Combination (Tables)
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995687 - Disclosure - Revenue Recognition (Tables)
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995697 - Disclosure - Fair Value Measurements (Tables)
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995707 - Disclosure - Inventories (Tables)
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995717 - Disclosure - Property and Equipment (Tables)
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995727 - Disclosure - Goodwill and Intangible Assets (Tables)
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995737 - Disclosure - Prepaid Expenses and Other (Tables)
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995747 - Disclosure - Accrued and Other Liabilities (Tables)
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995757 - Disclosure - Term Loans and Warrant Liabilities (Tables)
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995767 - Disclosure - Leases (Tables)
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995777 - Disclosure - Income Taxes (Tables)
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995787 - Disclosure - Share-Based Compensation (Tables)
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995797 - Disclosure - Net Loss Per Share (Tables)
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995807 - Disclosure - Segment Information (Tables)
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995817 - Disclosure - Major Customers, Suppliers and Related Information (Tables)
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995827 - Disclosure - Basis of Presentation and Significant Accounting Policies - Additional information (Details)
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995837 - Disclosure - Recent Accounting Pronouncements - Additional Information (Details)
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995847 - Disclosure - Business Combination - Additional Information (Details)
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995857 - Disclosure - Business Combination - Schedule of Consideration (Details)
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995867 - Disclosure - Business Combination - Schedule of Assets Acquired and Liabilities Assumed (Details)
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995877 - Disclosure - Business Combination - Schedule of Identifiable Intangible Assets (Details)
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995887 - Disclosure - Revenue Recognition - Additional Information (Details 1)
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995897 - Disclosure - Revenue Recognition - Additional Information (Details 2)
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995897 - Disclosure - Revenue Recognition - Additional Information (Details 2) [Default]
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995907 - Disclosure - Revenue Recognition - Schedule of Contract Asset and Contract Liabilities (Details)
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995917 - Disclosure - Fair Value Measurements - Fair Value by Major Security Type (Details)
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995927 - Disclosure - Fair Value Measurements - Additional Information (Details)
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995937 - Disclosure - Fair Value Measurements - Unrealized Loss on Investments (Details)
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995947 - Disclosure - Fair Value Measurements - Fair Value Measurement of Acquired Intangible Assets (Details)
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995957 - Disclosure - Fair Value Measurements - Holdback Liability Measured at Fair Value on a Non-recurring Basis (Details)
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995967 - Disclosure - Inventories - Schedule of Inventory (Details)
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995977 - Disclosure - Property and Equipment - Schedule of Property and Equipment (Details)
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995987 - Disclosure - Goodwill and Intangible Assets - Additional Information (Details)
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995997 - Disclosure - Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details)
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996007 - Disclosure - Goodwill and Intangible Assets - Summary of Intangible Assets (Details)
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996017 - Disclosure - Goodwill and Intangible Assets - Estimated Future Amortization Expense (Details)
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996027 - Disclosure - Prepaid Expenses and Other - Additional Information (Details)
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996037 - Disclosure - Prepaid Expenses and Other - Summary of Prepaid Expenses and Others (Details)
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996047 - Disclosure - Accrued and Other Liabilities - Additional Information (Details)
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996057 - Disclosure - Accrued and Other Liabilities - Summary of Accrued Liabilities (Details)
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996067 - Disclosure - Accrued and Other Liabilities - Summary of Changes in Warranty Reserve (Details)
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996077 - Disclosure - Term Loans and Warrant Liabilities - Additional Information (Details)
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996087 - Disclosure - Term Loans and Warrant Liabilities - Summary of Changes in Fair Value of Term Loan and First Amendment Term Loan Level 3 (Details)
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996097 - Disclosure - Term Loans and Warrant Liabilities - Summary of Fair Value Assumptions Applied in Determining Initial Fair Value and Subsequent Fair Value of Warrant Liabilities (Details)
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996107 - Disclosure - Term Loans and Warrant Liabilities - Summary of Changes in Fair Value of Warrant Liabilities Level 3 (Details)
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996117 - Disclosure - Leases - Additional information (Details)
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996127 - Disclosure - Leases - Summary of Operating ROU Assets and Liabilities (Details)
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996137 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details)
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996147 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details) 2
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996157 - Disclosure - Income Taxes - Summary of Pre-tax Income/(Loss) (Details)
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996167 - Disclosure - Income Taxes - Additional Information (Details)
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996177 - Disclosure - Income Taxes - Summary of Income Taxes (Details)
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996187 - Disclosure - Income Taxes - Summary of Reconciliation of Income Taxes (Details)
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996197 - Disclosure - Income Taxes - Summary of Significant Portion of Net Deferred Tax Asset (Details)
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996207 - Disclosure - Commitments and Contingencies - Additional Information (Details)
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996217 - Disclosure - Share-Based Compensation - Additional Information (Details)
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996227 - Disclosure - Share-Based Compensation - Summary of Stock Option Activity (Details)
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996237 - Disclosure - Share-Based Compensation - Summary of Stock Options Outstanding (Details)
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996247 - Disclosure - Share-Based Compensation - Summary of Weighted-Average Assumptions (Details)
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996257 - Disclosure - Share-Based Compensation - Summary of Restricted Stock Units Activity (Details)
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996267 - Disclosure - Share-Based Compensation - Summary of Share-based Compensation Expense (Details)
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996277 - Disclosure - Stockholders' Equity - Additional Information (Details)
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996287 - Disclosure - Net Loss Per Share - Schedule of Basic and Diluted Loss Per Share (Details)
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996297 - Disclosure - Segment Information - Additional Information (Details)
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996307 - Disclosure - Segment Information - Schedule of Segment Reporting Information by Segment (Details)
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996317 - Disclosure - Segment Information - Schedule of Segment Reporting Information by Segment (Long-Lived Assets) (Details)
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996327 - Disclosure - Major Customers, Suppliers and Related Information - Additional Information (Details)
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996337 - Disclosure - Major Customers, Suppliers and Related Information - Schedule of Revenues by Geographic Region (Details)
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996347 - Disclosure - Major Customers, Suppliers and Related Information - Schedule of Long Lived Assets by Geographic Region (Details)
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Weighted Average Grant Date Fair Value, Vested (in dollars per share)
Business Combination, Acquisition-Related Cost, Expense
Business combination, acquisition related costs
Weighted Average Exercise Price, Shares Forfeited/expired (in dollars per share)
gnss_NumberOfWhollyOwnedSubsidiaries
Represents the number of wholly owned subsidiaries of the reporting entity as of a certain date.
Number of wholly owned subsidiaries
Segments [Domain]
Concentration Risk Type [Axis]
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Entity Incorporation, State or Country Code
Preferred stock, shares issued (in shares)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value
Balance
Balance
Accounts payable
us-gaap_IncreaseDecreaseInAccountsPayable
Hardware [Member]
Represents hardware segment.
Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease)
Business combination, contingent consideration arrangements, change in amount of contingent consideration, liability
Remeasurement of acquisition contingent consideration
Plan Name [Axis]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
Unrealized loss position, more than 12 months, fair value
Equity [Abstract]
Grantee Status [Domain]
Entity Current Reporting Status
dei_EntityCurrentReportingStatus
Initial measurement of operating lease liabilities
The adjustments related to the initial measurement of operating lease liabilities.
Goodwill, Gross
Goodwill
Other State [Member]
Other state.
Agreement to issue stock.
Agreement To Issue Stock [Member]
Agreement to Issue Stock [Member]
Range Four [Member]
Supplementary information on outstanding and exercisable share awards as of the balance sheet date which stratifies outstanding options by range four of exercise price.
Operating expenses
gnss_BusinessAcquisitionEquityInterestIssuedOrIssuableNumberOfSharesEachAnniversaries
Represents number of shares of equity interest issued or issuable for business acquisition each anniversaries.
Business acquisition, equity interest issued or issuable, number of shares, each anniversaries
Fair Value, Inputs, Level 2 [Member]
Level 2 [Member]
Net deferred tax assets and liabilities
us-gaap_DeferredTaxAssetsNet
Range One [Member]
Supplementary information on outstanding and exercisable share awards as of the balance sheet date which stratifies outstanding options by range one of exercise price.
The amount of cash outflow for the acquisition of asset purchase holdback liability.
Payments To Acquire Asset Purchase Holdback Liability
Cash paid for asset purchase holdback liability
Commitments and Contingencies Disclosure [Text Block]
Commitments and Contingencies
Effect of exchange rate on operating lease liabilities
gnss_EffectOfExchangeRateOnOperatingLeaseLiability
mount of effect of exchange rate changes on operating lease liability.
us-gaap_CommonStockSharesAuthorized
Common stock, shares authorized (in shares)
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2029
Software [Member]
Represents the software segment.
Product and Service [Axis]
Fair Value by Liability Class [Domain]
Document Fiscal Period Focus
Revenue from Contract with Customer [Abstract]
Entity Shell Company
dei_EntityShellCompany
Grantee Status [Axis]
Other
us-gaap_OtherAccruedLiabilitiesCurrent
Inventories, gross
us-gaap_InventoryGross
Service [Member]
Contract and Other [Member]
Segment Information
Segment Reporting, Policy [Policy Text Block]
Cash and cash equivalents
Cash and cash equivalents
Cash and cash equivalents
Notes Payable, Current
Notes Payable, Current, Total
Notes payable, at fair value
gnss_GrossProceedsFromStockOptionsExercised
Amount of gross proceeds including cash proceeds and increase accounts receivable from exercise of stock options granted under share-based compensation arrangement.
Gross proceeds from stock options exercised
Cybersecurity Risk Management, Strategy, and Governance [Abstract]
Common Stock, Shares, Issued (in shares)
Common stock, shares, issued (in shares)
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]
Cybersecurity Risk Board of Directors Oversight [Text Block]
Accrued and Other Liabilities [Table]
Accrued and Other Liabilities.
Asset Class [Domain]
Statement [Table]
Long-term restricted cash
Internal Revenue Service (IRS) [Member]
us-gaap_IncreaseDecreaseInPrepaidExpense
Prepaid expenses and other
Prepaid expenses and other
Payments to Acquire Businesses, Gross
Cash paid
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price
Weighted average exercise price, outstanding balance
Americas [Member]
Americas
Statement [Line Items]
Business Combination [Domain]
Warrant [Member]
Warrant [Member]
Entity Filer Category
Total liabilities and stockholders' equity
us-gaap_LiabilitiesAndStockholdersEquity
Accrued and other liabilities
Purchases of marketable securities
us-gaap_PaymentsToAcquireMarketableSecurities
Weighted Average Exercise Price, Shares Exercisable (in dollars per share)
Long-Lived Tangible Asset [Axis]
Number of Shares Exercised (in shares)
Gross number of share options (or share units) exercised during the current period.
Number of Shares Exercised (in shares)
Unrealized foreign currency translation (loss) gain
Unrealized foreign currency translation gain
Evertel Technologies, LLC [Member]
Evertel technologies LLC.
Evertel Technologies LLC Member
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]
Trade Names [Member]
Trade Name Portfolio [Member]
Trade Name [Member]
Cash equivalents
Cash Equivalents
Exercise Price Range [Axis]
Warranty settlements
us-gaap_ProductWarrantyAccrualPayments
us-gaap_DeferredTaxAssetsValuationAllowance
Less valuation allowance
Less valuation allowance
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Cybersecurity Risk Management Third Party Engaged [Flag]
Documents Incorporated by Reference [Text Block]
us-gaap_Goodwill
Goodwill, Total
Goodwill
Beginning balance
Ending balance
Range Three [Member]
Supplementary information on outstanding and exercisable share awards as of the balance sheet date which stratifies outstanding options by range three of exercise price.
Investment Income, Interest
Interest income
Income Tax Authority [Axis]
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration
Geographical [Domain]
Finished goods
Finished goods
gnss_UnderwrittenPublicOfferingCommonStock
The number of shares to be offered in the initial pubic offering under the underwritten public offering
Underwritten public offering, common stock
Amika Mobile.
Amika Mobile [Member]
Initial measurement of operating lease right of use assets
The adjustments related to the initial measurement of operating lease right of use assets.
Schedule of Inventory, Current [Table Text Block]
Schedule of Inventory
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual
us-gaap_AllowanceForDoubtfulAccountsReceivable
Allowance for doubtful accounts for expected credit losses
Other assets
Shares retained for payment of taxes in connection with net share settlement of restricted stock units
Shares retained for payment of taxes in connection with net share settlement of restricted stock units
Change in R&D credit carryover
gnss_IncomeTaxReconciliationChangeInResearchAndDevelopmentCarryover
The amount of change in research and development carryover during the period.
Property, Plant and Equipment [Line Items]
Non-employee Advisors [Member]
Represents non-employee advisors.
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Estimated useful lives
Finite-lived intangible asset, useful life
Concentration Risk [Table]
Share Repurchase Program [Axis]
Customer Deposit
Customer deposit.
Customer deposit
Vesting [Domain]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Granted (in shares)
Share-based compensation arrangement by share-based payment award, options, grants in period, gross
Disaggregation of Revenue [Table]
Cybersecurity Risk Management, Strategy, and Governance [Table]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Schedule of Basic and Diluted Loss Per Share
Concentration Risk Disclosure [Text Block]
Major Customers, Suppliers and Related Information
Warranty provision
The expense (benefit) charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.
Basic (in dollars per share)
Earnings Per Share, Basic, Total
Basic loss per share
Net loss per common share - basic (in dollars per share)
Loss on disposal of fixed asset
Amount of gain ( loss ) on sale or disposal of fixed assets.
Loss on disposal of fixed asset
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Outstanding (in shares)
Outstanding (in shares)
Basis of Presentation and Siginificant Accounting Policies [Table]
Basis of presentation and siginificant accounting policies.
Shares issued
Stock Issued
Debt, Policy [Policy Text Block]
Term Loans
Customer two.
Customer Two [Member]
Customer Two
Finite-Lived Intangible Assets Acquired
Fair value, intangibles
Acquisitions
Addition Of Operating Lease Right Of Use Asset
Addition of operating lease right of use asset.
Addition of operating lease right of use asset
Total current liabilities
us-gaap_LiabilitiesCurrent
us-gaap_IncreaseDecreaseInAccountsReceivable
Accounts receivable, net
Accounts receivable, net
Adjustments to reconcile net loss to net cash used in operating activities:
Lessee, Operating Lease, Liability, to be Paid, Year Five
Lessee, Operating Lease, Liability, to be Paid, Year Five
2030
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Major Customer [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Summary of Changes in Fair Value of Term Loan and First Amendment Term Loan Level 3
Trade shows and travel
gnss_PrepaidTradeShowsAndTravel
Amount of consideration paid in advance for trade shows and travel that provides economic benefits within a future period of one year or the normal operating cycle, if longer.
Domestic Tax Authority [Member]
Domestic Operations [Member]
Share Repurchase Program [Domain]
Proceeds from maturities of marketable securities
Nondeductible compensation, interest expense and other
gnss_NondeductibleCompensationInterestExpenseAndOther
Income tax reconciliation non deductible expense share based compensation cost interest and other.
Accounting Standards Update [Axis]
Acquisition or asset purchase holdback liability.
Acquisition or Asset Purchase Holdback Liability [Member]
Stockholders' Equity, Policy [Policy Text Block]
Warrants
Consolidation Items [Domain]
Finite lived intangible assets fair value disclosure gain (loss)
Finite Lived Intangible Assets Fair Value Disclosure Gain (Loss)
Intangible assets, gain (loss)
Stockholders' equity:
Business combination consideration transferred and to be transferred.
Business Combination Consideration Transferred And To Be Transferred
Business Combination, Consideration Transferred and to be Transferred
Effect of exchange rate on operating lease ROU assets
Amount of effect of exchange rate changes on operating lease ROU assets.
Entity Small Business
Customer deposit
Increase (Decrease) in Customer deposit
Increase (Decrease) in Customer deposit
Prepaid professional services
gnss_PrepaidProfessionalServices
Amount of asset related to prepaid professional services.
Accumulated deficit
Share-based compensation
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Operating ROU assets
gnss_DeferredTaxLiabilitiesOperatingRightofuseAssets
Amount of deferred tax liability attributable to taxable temporary differences from operating right-of-use assets.
Nature of Operations [Text Block]
Operations
Accretion of acquisition holdback liability
Entity Well-known Seasoned Issuer
dei_EntityWellKnownSeasonedIssuer
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration
us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value
Foreign
us-gaap_CurrentForeignTaxExpenseBenefit
Canadian goods and services and harmonized sales tax payable
us-gaap_SalesAndExciseTaxPayableCurrent
Warrants and Rights Outstanding, Measurement Input
Warrants and rights outstanding, measurement input
Share-Based Payment Arrangement [Text Block]
Share-Based Compensation
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Share-Based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term
Weighted average remaining contractual life
Leases [Abstract]
Capitalized Research And Experimental
Capitalized R&E expenses
Costs that are paid or incurred in connection with the trade or business which represents cost in the experimental or laboratory sense.
Reserve for obsolescence
us-gaap_InventoryValuationReserves
us-gaap_ContractWithCustomerLiability
Ending Balance
Beginning Balance
Lessee, Lease, Description [Line Items]
Amendment Flag
Product and Service [Domain]
Income taxes computed at the federal statutory rate
us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Inventory Disclosure [Text Block]
Inventories
Class of Warrant or Right, Number of Securities Called by Warrants or Rights
Class of warrant or right, number of securities called by warrants or rights
gnss_NumberOfMajorCustomers
Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.
Number of major customers
Earnings Per Share, Policy [Policy Text Block]
Net Loss Per Share
Concentration Risk [Line Items]
Liabilities and Equity [Abstract]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash used in operating activities
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description
us-gaap_NonfinancialLiabilitiesFairValueDisclosure
Balance
Balance
Common Stock [Member]
Common Stock [Member]
Warranty reserve
us-gaap_ProductWarrantyAccrualClassifiedCurrent
Cybersecurity Risk Role of Management [Text Block]
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined contribution plan, employer discretionary contribution amount
Weighted Average Exercise Price, Shares Granted (in dollars per share)
Granted, weighted average exercise price (in dollars per share)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2028
us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Accumulated depreciation
Customer one.
Customer One [Member]
Customer One
Entity Address, Address Line One
Gross deferred tax liabilities
us-gaap_DeferredIncomeTaxLiabilities
Deferred income taxes
us-gaap_DeferredIncomeTaxesAndTaxCredits
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Summary of Weighted Average Assumptions
Fair Value Hierarchy and NAV [Axis]
Earnings Per Share [Abstract]
Income Tax, Policy [Policy Text Block]
Income Taxes
Prepaid Expenses and Other [Table]
Prepaid expenses and other.
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]
Supplemental Cash Flow Information [Abstract]
Supplemental disclosure of cash flow information
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Foreign Currency Translation
Customer Deposits [Member]
Refundable consideration, usually cash, held by the entity pending satisfactory completion of the entity's obligations or pending the closing of a contract.
Goodwill and Intangible Assets Disclosure [Text Block]
Goodwill and Intangible Assets
Operating lease, right-of-use asset
Operating lease right of use assets, net
Operating lease ROU assets as of September 30, 2024
Operating lease ROU assets as of September 30, 2025
Debt Securities, Available-for-Sale, Unrealized Loss Position
Unrealized loss position, fair value
Unrealized loss positions related to available-for-sale debt securities
Gross deferred tax assets
us-gaap_DeferredTaxAssetsGross
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]
Customer Deposits
Customer deposits
Customer deposit
Inventory Disclosure [Abstract]
Class of Warrant or Right [Axis]
Document Type
dei_DocumentType
Goodwill and Intangible Assets, Policy [Policy Text Block]
Goodwill And Intangible Assets
Cash paid for taxes
Income Taxes Paid, Net, Total
Income Taxes Paid, Net
Gross profit
us-gaap_GrossProfit
Entity Central Index Key
Allowance for doubtful accounts for expected credit losses
Schedule of Changes in Finite Lived Intangible Assets [Table Text Block]
Tabular disclosure of changes in finite lived intangible assets.
Schedule of Changes in Finite Lived Intangible Assets
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]
Term loan and warrant liabilities.
Term Loans and Warrant Liabilities [Abstract]
Effect of exchange rate on deferred revenue
gnss_ContractWithCustomerLiabilityEffectOfExchangeRate
Represents effect of exchange rate for contract with customer liability.
Valuation Approach and Technique [Axis]
Contract manufacturers.
Contract Manufacturers [Policy Text Block]
Contract Manufacturers
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase (decrease) in cash, cash equivalents, and restricted cash
Fair Value Adjustment of Warrants
(Gain) loss on change in fair value of warrants
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]
Schedule of Revenues by Geographic Region
Options (in shares)
Antidilutive (in shares)
Recognition of revenue as a result of satisfying performance obligations
gnss_ContractWithCustomerLiabilityRevenueRecognizedDuringPeriod
Amount of revenue recognized during period including amounts previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.
us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Stock repurchased and retired during period, shares
Impairment of long-lived assets
Impairment of Long-Lived Assets to be Disposed of
us-gaap_CommonStockParOrStatedValuePerShare
Common stock, par value (in dollars per share)
Accounting Standards Update [Domain]
Former Owner of Amika Mobile [Member]
Related to the former owner of Amika Mobile.
Less amortization of operating lease ROU assets
Amortization of operating lease right of use asset
Goodwill [Line Items]
Cost basis
Cost Basis
Document Financial Statement Error Correction [Flag]
dei_DocumentFinStmtErrorCorrectionFlag
Shipping and handling costs.
Shipping and Handling Costs
Shipping and handling costs
Issuance of common stock upon exercise of stock options, net (in shares)
Share-based compensation arrangement by share-based payment award, options, exercises in period
Goodwill from software reporting unit
Goodwill from Evertel acquisition
Total
Accrued liabilities
Represents the gross amount received from issuance of debt and warrants.
Proceeds From Issuance Of Debt And Warrants Gross
Proceeds from issuance of debt
Cost of Sales [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Current Fiscal Year End Date
Business Combination, Intangible Asset, Acquired, Finite-Lived [Table Text Block]
Schedule of Identifiable Intangible Assets
Schedule of Product Warranty Liability [Table Text Block]
Summary of Changes in Warranty Reserve
Other Noncurrent Liabilities [Table Text Block]
Summary of Other Noncurrent Liabilities
Long-Lived Assets by Geographic Areas [Table Text Block]
Schedule of Long Lived Assets by Geographic Region
Long-term restricted cash
us-gaap_RestrictedCashAndCashEquivalentsNoncurrent
CALIFORNIA
CALIFORNIA [Member]
Advertising Cost [Policy Text Block]
Advertising
Customer Relationships [Member]
Entity Address, State or Province
Prepaid commissions
us-gaap_CapitalizedContractCostNetCurrent
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Outstanding, number of shares (in shares)
Outstanding, number of shares (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Outstanding, Number
Share-based compensation arrangement by share-based payment award, remaining outstanding, number.
Share-based compensation arrangement by share-based payment award, number of shares remaining outstanding
Business Combination [Table Text Block]
Schedule of Consideration
Preferred stock, shares outstanding (in shares)
Preferred stock, shares outstanding, ending balance (in shares)
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive loss
gnss_BusinessCombinationConsiderationTransferredEquityInterestsIssuable
Amount of equity interests of the acquirer, including instruments or interests issuable in consideration for the business combination.
Common stock to be issued
Obligation to issue common stock in connection with the Evertel acquisition
Unrealized Gain
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Research and Development Expense, Policy [Policy Text Block]
Research And Development Costs
gnss_InvestmentsTypicalFinalMaturity
Represents the final maturity that the Company generally does not exceed with regard to the financial instruments in which it invests.
Investments typical final maturity maximum year
Risks and Uncertainties [Abstract]
Class of Warrant or Right [Domain]
Geographical [Axis]
Contract with Customer, Liability, Revenue Recognized
Revenue recognized
Accounts Receivable [Member]
Accounts Receivable
Shares retained for payment of taxes in connection with net share settlement of restricted stock units (in shares)
Shares retained for payment of taxes in connection with net share settlement of restricted stock units (in shares)
Share-based payment arrangement, shares withheld for tax withholding obligation
Short-term marketable securities
Short-term Securities
Raw materials
Raw materials
Puerto Rico sales tax receivable
Sales Tax Receivable
Sales tax receivable.
Stock Issued During Period Obligation To Issue Common Stock Shares In Evertel Acquisition
Stock issued during period obligation to issue common stock shares in Evertel acquisition.
Obligation to issue common stock in Evertel acquisition (in shares)
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Summary of Stock Options Outstanding
State income taxes, net of federal tax benefit
us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Summary of Share-based Compensation Expense
Issuance of common stock upon exercise of stock options, net
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Summary of Significant Portion of Net Deferred Tax Asset
Currency translation
gnss_CurrencyTranslationFairValueAdjustment
Amount of currency translation to the amount at which a liability could be incurred (settled) in a current transaction between willing parties.
Allowances
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Performance Shares [Member]
Deferred tax assets, net
Marketable Securities, Policy [Policy Text Block]
Marketable Securities
Property, Plant and Equipment [Abstract]
Research and development credit
us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Fair Value Measurement Inputs and Valuation Techniques [Table]
Antidilutive Securities [Axis]
Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current
Prepaid expenses
Gross margin.
Gross margin
Gross margin
Customer 2 [Member]
Represents customer 2.
Europe, Middle East and Africa
EMEA [Member]
Basis of Presentation and Significant Accounting Policies [Text Block]
Basis of Presentation and Significant Accounting Policies
us-gaap_CapitalizedContractCostAmortizationPeriod
Capitalized contract cost, amortization period
Share-Based Payment Arrangement, Option, Exercise Price Range [Table]
Value-Added Tax Receivable and Bank Withholdings
Value-added tax receivable and bank withholdings.
Spain value-added tax receivable and bank withholdings
State and Local Jurisdiction [Member]
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Customer [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Goodwill from software reporting unit, gain (loss)
Impairment of goodwill
Goodwill impairment
Goodwill impairment charge
Finite-Lived Intangible Asset, Expected Amortization, after Year Five
Thereafter
Preferred stock, $0.00001 par value; 5,000,000 shares authorized; none issued and outstanding
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill
Intangible assets
Cash and cash equivalents retained in foreign banks.
Cash and Cash Equivalents retained in Foreign Banks
Cash and cash equivalents retained in foreign banks
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable
Number exercisable
Selling, general and administrative
Selling, General and Administrative Expense, Total
Debt Instrument, Maturity Date
Debt instrument, maturity date
Minimum [Member]
Weighted Average Grant Date Fair Value, Granted (in dollars per share)
Assets, Current [Abstract]
Current assets:
Amortization
Amortization expense
Fair Value, Inputs, Level 3 [Member]
Level 3 [Member]
Fair Value, Nonrecurring [Member]
Fair value, nonrecurring [Member]
Segment Reporting [Abstract]
Equipment
us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Business Combination [Policy Text Block]
Business Combinations
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Schedule of Unrealized Gain (Loss) on Investments
Current liabilities:
Product [Member]
Accounting Policies [Table[
Accounting Policies [Table[
Accruals and other
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Balance (in shares)
Balance (in shares)
us-gaap_SharesOutstanding
Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Accounts receivable, net of allowance for doubtful accounts of $65
Accounts receivable, net of allowance for doubtful accounts for expected credit losses of $65
Stock Issued During Period Value Stock Options Exercised, Cashless
The cashless value of stock issued as a result of the exercise of stock options
Issuance of common stock upon cashless exercise of stock options, net
Commitments and Contingencies
Commitments and Contingencies (Note 15)
Leases
Lessee, Leases [Policy Text Block]
us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
Shares granted, value, share-based payment arrangement, before forfeiture
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Outstanding, weighted average grant date fair value (in dollars per share)
Outstanding, weighted average grant date fair value (in dollars per share)
Work in process
Work in process
Provision for doubtful accounts
Operating Lease, Liability
us-gaap_OperatingLeaseLiability
Present value of operating lease liabilities
Operating lease liabilities at September 30, 2024
Operating lease liabilities as of September 30, 2025
Auditor Firm ID
Debt Instrument, Basis Spread on Variable Rate
Debt instrument, basis spread on variable rate
Restricted cash
Concentration Risk Benchmark [Axis]
Certificates of deposit
Long-term marketable securities
Long-term Securities
Employees, Directors, and Consultants [Member]
Represents information related to employees, directors, and consultants.
Goodwill and Intangible Assets, Foreign Currency Translation Gain (Loss)
gnss_GoodwillAndIntangibleAssetsForeignCurrencyTranslationGainLoss
Amount of foreign currency translation gain (loss) which increases (decreases) goodwill and intangible assets.
New performance obligations
Amount of increase in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from new contract.
Lessee, Lease, Description [Table]
Assets Acquisition of Amika Mobile Corporation [Member]
Represents the assets acquisition of Amika Mobile Corporation.
Effect of foreign exchange rate on cash
Capital Expenditures Incurred but Not yet Paid
Purchases of property and equipment included in accounts payable and accrued liabilities
Non-employee Directors [Member]
Related to non-employee directors.
Gain (loss) in goodwill
Goodwill fair value gain (loss)
Goodwill Fair Value Gain (Loss)
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]
Diluted (in shares)
Basic (in shares)
Goodwill, Acquired During Period
Acquisition
Document Information [Line Items]
Current and Noncurrent Accrued Liabilities [Text Block]
Current and noncurrent accrued liabilities [text block]
Accrued and Other Liabilities
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Share-based compensation arrangement by share-based payment award, options, exercisable, intrinsic value
Vests Immediately [Member]
Relating to vests immediately
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Summary of Reconciliation of Income Taxes
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Related to Evertel Technologies, LLC.
Evertel Technologies, LLC [Member]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Unrealized loss position, more than 12 months, gross unrealized loss
Unrealized loss position, more than 12 months, gross unrealized loss
Segments [Axis]
Long-Lived Tangible Asset [Domain]
gnss_ExtendedProductWarrantyTerm
Represents term of extended product warranty.
Extended product warranty term (year)
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]
Change in fair value of term loan and warrants.
Change in Fair Value of Term Loan and Warrants
Change in fair value of Term Loans and warrants
PUERTO RICO
Puerto Rico Early Warning System
Puerto Rico Early Warning System Project [Member]
Share-based compensation expense
Business Combination, Contingent Consideration, Liability, Current
Acquisition liability
Change in valuation allowance
us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Total stockholders' equity
Balance
Balance
us-gaap_StockholdersEquity
Preferred stock, par value (in dollars per share)
Preferred stock, par or stated value per share
Statement of Stockholders' Equity [Abstract]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Valuation Approach and Technique [Domain]
Other Liabilities Disclosure [Abstract]
Use of Estimates, Policy [Policy Text Block]
Use Of Estimates
Value-Added tax and bank withholdings.
Value-Added Tax and Bank Withholdings
Value-Added Tax and bank withholdings
gnss_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsAndEquityInstrumentsOtherThanOptionsOutstandingNumber
Number of options and equity instruments other than options outstanding.
Share-based compensation arrangement by share-based payment award, options and equity instruments other than options, outstanding, number
Leasehold Improvements [Member]
Gain (Loss), Foreign Currency Transaction, before Tax
us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Translation gain
Fair Value Disclosures [Text Block]
Fair Value Measurements
UNITED STATES
United States
Percentage points added to the reference rate to compute the variable rate on the debt instrument when repayment debt in cash.
Debt Instrument, Basis Spread on Variable Rate, When Repayment in Cash
Debt instrument, basis spread on variable rate, when repayment in cash
Debt and warrants liabilities.
Debt and Warrants Liabilities [Text Block]
Term Loans and Warrant Liabilities
Schedule of Accrued Liabilities [Table Text Block]
Summary of Accrued Liabilities
Debt Instrument, Name [Domain]
Other
us-gaap_OtherAssetsCurrent
Noncash investing and financing activities:
Measurement Input, Discount Rate [Member]
Measurement input, discount rate [Member]
Prepaid Expense and Other Assets
us-gaap_PrepaidExpenseAndOtherAssets
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]
Plan Name [Domain]
Holdback Liability [Member]
Represents Holdback Liability.
Holdback liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Receivable [Policy Text Block]
Accounts Receivable and Allowance for Doubtful Accounts for Expected Credit Losses
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Entity [Domain]
Amount of cash inflow from issuance of debt and warrants.
Proceeds From Issuance Of Debt And Warrants
Proceeds from issuance of Close Date Term Loan and warrants, net of issuance cost
Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]
State
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]
Certificates of Deposit [Member]
Certificates of Deposit [Member]
Income Tax Disclosure [Line Items]
Income tax disclosure.
Business Combination, Recognized Liability Assumed, Liability [Abstract]
Liabilities assumed
gnss_ShareBasedCompensationArrangementByShareBasedPaymentAwardProposedNumberOfSharesAuthorized
Number of shares authorized by the reporting entity's board of directors for issuance under share-based payment arrangement, but still awaiting approval by the reporting entity's stockholders as of the specified date.
Share-based compensation arrangement by share-based payment award, proposed number of shares authorized
Foreign Operations [Member]
Foreign Tax Jurisdiction [Member]
us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes
NOL expirations and other prior year true-ups
Income Tax Disclosure [Table]
Income tax disclosure.
Transfer in
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3
Close Date Term Loan [Member]
Close date term loan.
Close Date Term Loan [Member]
Entity Address, City or Town
Business combination contingent consideration liability settled.
Business Combination Contingent Consideration Liability Settled
Business combination, contingent consideration, liability settled
Payment
Payment
Prepaid Expenses And Other Disclosure [Text Block]
The entire disclosure for prepaid expenses and other.
Prepaid Expenses and Other
Business Combination, Contingent Consideration, Liability, Total
Business Combination, Contingent Consideration, Liability
Business combination, contingent consideration, liability
First Amendment Term Loan [Member]
First Amendment Term Loan [Member]
First amendment term loan.
us-gaap_NumberOfReportableSegments
Number of reportable segments
Common stock, $0.00001 par value per share
Security Exchange Name
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
Property and equipment
Property and equipment, gross
Intersegment Eliminations [Member]
Business combination consideration transferred working capital adjustment.
Business Combination Consideration Transferred Working Capital Adjustment
Working capital adjustment
Business combination, consideration transferred, working capital adjustment
Additional Operating Lease Liabilities
Additional operating lease liabilities.
Additional operating lease liabilities
Counterparty Name [Axis]
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Loss before income taxes
Pre-tax income/(loss)
Loss before income taxes
Concentration Risk Type [Domain]
Gain (Loss) On Debt Issuance
Gain (loss) on debt issuance.
Loss on issuance of First Amendment Term Loan
Loss on issuance of First Amendment Term Loan
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Share-based compensation arrangement by share-based payment award, non-option equity instruments, granted
Common Stock Award [Member]
Represents the common stock award.
Measurement Input Type [Domain]
Antidilutive Securities, Name [Domain]
Share-Based Payment Arrangement, Employee [Member]
Inventories, net
Inventories, net
Patents
us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Cash paid for interest
Interest Paid, Excluding Capitalized Interest, Operating Activity
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Statistical Measurement [Domain]
Class of Warrant or Right, Exercise Price of Warrants or Rights
Class of warrant or right, exercise price of warrants or rights
Total current assets
us-gaap_AssetsCurrent
us-gaap_AllocatedShareBasedCompensationExpense
Share-based payment arrangement, expense
Stock-based compensation
Shares surrendered from stock option exercises
Amount of shares surrendered from stock option exercises.
Document Period End Date
dei_DocumentPeriodEndDate
Title of Individual [Axis]
Fair Value Hierarchy and NAV [Domain]
dei_IcfrAuditorAttestationFlag
ICFR Auditor Attestation Flag
Notes To Financial Statements [Abstract]
Number of Shares Exercisable (in shares)
Vesting Based on Market Conditions [Member]
Relating to vesting based on market conditions.
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life
Estimated useful life, intangibles (Year)
Statement of Financial Position [Abstract]
Restricted Stock Units (RSUs) [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Business Combination, Recognized Asset Acquired, Asset [Abstract]
Assets acquired
Antidilutive Security, Excluded EPS Calculation [Table]
Vesting [Axis]
Total current tax provision
us-gaap_CurrentIncomeTaxExpenseBenefit
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
gnss_GrossProceedsFromUnderwrittenPublicOfferingCommonStock
Amount of gross proceeds including cash proceeds and increase amounts receivable from underwritten public offering.
Gross proceeds from underwritten public offering, common stock
us-gaap_Liabilities
Total liabilities
Finite-Lived Intangible Assets, Fair Value Disclosure
Intangible assets from Evertel acquisition
Business combination contingent consideration liability acquired.
Business Combination Contingent Consideration Liability Acquired
Contingent consideration
The value of stock released from the obligation to issue.
Release of obligation to issue common stock
us-gaap_Dividends
Dividends
Foreign rate differential
us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2027
us-gaap_RestrictedCash
Restricted cash
Range Two [Member]
Supplementary information on outstanding and exercisable share awards as of the balance sheet date which stratifies outstanding options by range two of exercise price.
us-gaap_AdvertisingExpense
Advertising expense
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
Prepaid Expense and Other Assets, Current [Abstract]
Technology
Intangible assets, gross carrying amount
Range Six [Member]
Range Six [Member]
Accounting Policies [Line Items]
Accounting Policies [Line Items]
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Unrealized loss position, less than 12 months, gross unrealized loss
The amount of obligation to issue common stock for business acquisition.
Business Acquisition Obligation To Issue Common Stock
Business acquisition, obligation to issue common stock
Weighted average shares outstanding - diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted, Total
Diluted (in shares)
Weighted average shares outstanding - diluted (in shares)
Entity File Number
dei_EntityFileNumber
Unrealized loss on marketable securities
Unrealized (loss) gain on marketable securities
Accounting Standards Update 2023-07 [Member]
ASU No. 2023-07
Cover [Abstract]
Measurement Input Type [Axis]
Schedule of Business Combination, Fair Value Measurement of Acquired Intangible Assets
Business combination fair value measurement of acquired intangible assets.
Business Combination Fair Value Measurement Of Acquired Intangible Assets [Table Text Block]
Prepaid expenses and other
Prepaid Expense and Other Assets, Current
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Number of Shares Forfeited/Cancelled (in shares)
Revenue Benchmark [Member]
Revenue Benchmark
Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]
Schedule of Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-based compensation arrangement by share-based payment award, number of shares authorized
Segment Reporting Disclosure [Text Block]
Segment Information
Issuance of common stock in business combination (in shares)
Stock issued during period, shares, acquisitions
Revenues
Product sales
Total Revenues
Number of Shares Forfeited/expired (in shares)
Number of Shares Forfeited/expired (in shares)
gnss_SharesPaidForTaxWithholdingForShareBasedCompensationCashless
Number of shares used to settle cashless grantee's tax withholding obligation for award under share-based arrangement.
Shares retained for payment of taxes in connection with cashless exercise of stock options (in shares)
Finite-Lived Intangible Assets, Net
us-gaap_FiniteLivedIntangibleAssetsNet
Beginning balance
Ending balance
Operating Lease, Expense
us-gaap_OperatingLeaseExpense
Schedule of Income before Income Tax, Domestic and Foreign [Table]
Schedule of income before income tax, domestic and foreign.
Shipping and handling costs.
Shipping and Handling Costs [Policy Text Block]
Shipping And Handling Costs
us-gaap_PropertyPlantAndEquipmentUsefulLife
Property, plant and equipment, estimated useful lives
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Summary of Maturities of Operating ROU Assets and Liabilities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Deferred revenue
Current portion as of September 30, 2025
Total liabilities
Business Combination, Recognized Liability Assumed, Liability
Increase (Decrease) in Contract with Customer, Asset
Contract assets
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed
Total return as percentage of principal amount repaid
Depreciation expense
us-gaap_Depreciation
gnss_PricePerShareUnderwrittenAgreement
Per share price or per unit amount of equity securities issued under the underwritten public offering.
Price per share, underwritten agreement
Proceeds from Issuance of Long-Term Debt
Proceeds from Issuance of Long-Term Debt, Total
Proceeds from issuance of First Amendment Term Loan
Additional operating lease ROU assets
Additional Operating Lease Right Of Use Assets
Additional operating lease right of use assets.
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
Share-based payment arrangement, nonvested award, excluding option, cost not yet recognized, amount
gnss_NumberOfAdditionalInactiveSubsidiaries
Represents the number of additional inactive subsidiaries of the reporting entity, as of a certain date.
Number of additional inactive subsidiaries
Common stock, outstanding (in shares)
Common stock, shares, outstanding (in shares)
Represents term loan.
Term Loan [Member]
Term loan [Member]
Fair value adjustment of debt.
Fair Value Adjustment Of Debt
Loss on change in fair value of Term Loans
Business combination recognized identifiable assets acquired and liabilities assumed current liabilities accrued commissions.
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities Accrued Commissions
Accrued commissions
Operating lease liabilities, current portion
Operating lease liabilities, current portion
Depreciation and amortization
us-gaap_DepreciationDepletionAndAmortization
Revenue, Remaining Performance Obligation, Amount
us-gaap_RevenueRemainingPerformanceObligation
Cybersecurity Risk Management Processes Integrated [Flag]
Document Transition Report
dei_DocumentTransitionReport
Deferred Tax Assets, Net
us-gaap_DeferredTaxAssetsLiabilitiesNet
Total operating expenses
us-gaap_OperatingExpenses
Research and development
Research and Development Expense, Total
Research and development
Cost of revenues
Cost of revenue
Cost of Revenue, Total
Lessee, Operating Leases [Text Block]
Leases
Valuation Technique, Discounted Cash Flow [Member]
Valuation technique, discounted cash flow [Member]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Summary of Income Taxes
Statement of Cash Flows [Abstract]
Prepaid Expenses and Other [Line Items]
Prepaid expenses and other.
Federal
us-gaap_CurrentFederalTaxExpenseBenefit
Stock Issued During Period, Value, New Issues
Issuance of common stock upon offering, net of issuance costs
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Summary of Stock Option Activity
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount
Business combination, contingent consideration arrangements, range of outcomes, value, high
Payments to Acquire Businesses, Net of Cash Acquired, Total
Payments to Acquire Businesses, Net of Cash Acquired
Cash paid for acquisitions net of cash acquired
Equity [Text Block]
Stockholders' Equity
Earnings Per Share [Text Block]
Net Loss Per Share
Basis of Presentation and Siginificant Accounting Policies [Line Items]
Basis of presentation and siginificant accounting policies.
Cybersecurity Risk Management Processes Integrated [Text Block]
Net loss
Net (loss) income
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value
Inventory obsolescence
Inventories, net
us-gaap_IncreaseDecreaseInInventories
Increase in additional paid in capital obligation to issue common stock.
Increase In Additional Paid in Capital Obligation To Issue Common Stock
Increase in additional paid-in capital, obligation to issue common stock
Obligation to issue common stock in Evertel acquisition
Canadian goods and services and harmonized sales tax receivable
us-gaap_IncomeTaxesReceivable
Dividend yield (Rate)
Intangible assets, net
Less lease principal payments on operating lease liabilities
us-gaap_OperatingLeasePayments
ASSETS
Income Tax Authority, Name [Axis]
Stock Issued During Period Obligation To Issue Common Stock value In Evertel Acquisition
Stock issued during period obligation to issue common stock value in Evertel acquisition.
Obligation to issue common stock in Evertel acquisition
Risk-free interest rate (Rate)
Construction in Progress [Member]
Document Fiscal Year Focus
Asia Pacific [Member]
Asia Pacific
Exercise Price Range [Domain]
Debt instrument, measurement input
Debt Instrument, Measurement Input
Concentration Risk Benchmark [Domain]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Investing Activities:
The amount of debt and warrant issuance costs that were incurred during a noncash or partial noncash transaction.
Debt And Warrant Issuance Costs Incurred During Noncash Or Partial Noncash Transaction
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit
Upper exercise price
Accounts payable
Interest Expense, Nonoperating, Total
Interest Expense, Nonoperating
Interest expense
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
Summary of Pre-tax Income/(Loss)
Research and Development Expense [Member]
Research and Development Expense [Member]
Customer three.
Customer Three [Member]
Customer Three
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Schedule of Contract Asset and Contract Liabilities
Federal
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
Summary of Prepaid Expenses and Others
Stock Issued During Period Shares Stock Options Exercised, Cashless (in shares)
Number of share options ( or share units exercised during the current period that are cashless.
Issuance of common stock upon cashless exercise of stock options, net (in shares)
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2026
Proceeds from exercise of stock options
Fair Value Disclosures [Abstract]
Commitments and Contingencies Disclosure [Abstract]
Issuance of common stock in business combination
Stock issued during period, value, acquisitions
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2026
Business combination recognized identifiable assets acquired and liabilities assumed assets including goodwill.
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets Including Goodwill
Total Assets
Customer 1 [Member]
Represents customer 1.
Deferred revenue
Business Combination, Recognized Liability Assumed, Deferred Revenue, Current
Short term provision.
Short Term Provision
Short-term provision
Board of Directors [Member]
Information pertaining to the Board of Directors.
Contract with Customer, Asset, after Allowance for Credit Loss, Current
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total
Contract assets
Payment for Contingent Consideration Liability, Financing Activities
Payment for contingent consideration liability, financing activities
Payment of contingent consideration
Employees [Member]
Represents the employees of the company.
Debt Instrument [Axis]
Thereafter
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
Share-Based Payment Arrangement [Abstract]
Customer 3 [Member]
Represents customer 3.
Fair value
Fair Value
Acquired intangible assets
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Deferred tax liability
Business Combination, Recognized Liability Assumed, Deferred Tax Liability
us-gaap_ConcentrationRiskPercentage1
Concentration risk percentage
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Summary of Restricted Stock Units Activity
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash provided by (used in) investing activities
Accrued contract costs
gnss_AccruedContractCosts
Represents accrued contract costs.
Incentive Stock Options [Member]
Represents incentive stock options.
Title of 12(b) Security
Schedule of Segment Reporting Information, by Segment [Table]
Weighted Average Grant Date Fair Value, Forfeited/cancelled (in dollars per share)
Income Tax Disclosure [Text Block]
Income Taxes
Weighted average shares outstanding - basic (in shares)
Weighted average shares outstanding - basic
Patents [Member]
Patents
Options and RSUs [Member]
Represents the options and RSUs.
Document Information [Table]
Consolidated Entities [Axis]
Legal Entity [Axis]
Changes in operating assets and liabilities:
Changes in operating assets and liabilities, net of the effects from acquisition:
us-gaap_BusinessAcquisitionSharePrice
Business acquisition, share price
Property, Plant and Equipment [Table Text Block]
Schedule of Property and Equipment
Initial Measurement of Operating Lease [Table Text Block]
Tabular disclosure of initial measurement of operating lease.
Summary of Operating ROU Assets and Liabilities
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Outstanding, weighted average exercise price (in dollars per share)
Outstanding, weighted average exercise price (in dollars per share)
Income Tax Disclosure [Abstract]
Fair Value, Recurring and Nonrecurring [Table]
Key Executive [Member]
Represents information pertaining to a key executive.
Business Combination [Text Block]
Business Combination
Unrecognized Tax Benefits, Beginning Balance
Unrecognized Tax Benefits, Ending Balance
Unrecognized Tax Benefits
Unrecognized Tax Benefits
Additional Paid-in Capital [Member]
Additional Paid-in Capital [Member]
2025 Equity Plan [Member]
Equity Plan 2025 [Member]
Represents The 2025 Equity Incentive Plan ("2025" Equity Plan").
Inventory Obsolescence Write Down (Recoveries)
Inventory Obsolescence Write Down (Recoveries)
gnss_InventoryObsolescenceWriteDownRecoveries
Represents the write-down (recovery) of the value of inventory resulting from obsolescence.
Measurement Frequency [Domain]
us-gaap_StockRepurchaseProgramAuthorizedAmount1
Stock repurchase program, authorized amount
Income Statement Location [Axis]
Change in Accounting Principle, Accounting Standards Update, Adoption Date
GNSS
Trading Symbol
Property, Plant and Equipment Disclosure [Text Block]
Property and Equipment
Accretion
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Schedule of Finite-Lived Intangible Assets
Payroll and related
us-gaap_EmployeeRelatedLiabilitiesCurrent
Financing Activities:
Expected term in years (Year)
Fair Value, Recurring [Member]
Total undiscounted operating lease payments
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Range Five [Member]
Range Five [Member]
Less imputed interest
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Goodwill and Intangible Asset Impairment, Total
Goodwill and intangible asset impairment
Goodwill and Intangible Asset Impairment
Goodwill impairment charge
Equity Components [Axis]
Equity Component [Domain]
Asset Class [Axis]
Goodwill and Intangible Assets Disclosure [Abstract]
Deferred Revenue, Noncurrent, Total
Deferred Revenue, Noncurrent
Long-term deferred revenue
Beginning balance
Ending balance
us-gaap_ProductWarrantyAccrual
Warranty reserve
Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block]
Schedule of Assets Acquired and Liabilities Assumed
Document Annual Report
dei_DocumentAnnualReport
Represents operating lease right-of-use asset.
Operating Lease, Right-of-use Asset [Member]
Business Combination [Axis]
Prepaid insurance
us-gaap_PrepaidInsurance
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures
Issuance of common stock upon vesting of restricted stock units (in shares)
Machinery and Equipment [Member]
Customer [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Notes payable, at fair value
Notes Payable, Noncurrent, Total
Notes Payable, Noncurrent
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-based compensation arrangement by share-based payment award, expiration period
2015 Equity Plan [Member]
Represents The 2015 Equity Incentive Plan ("2015" Equity Plan").
Contingent consideration liability.
Contingent Consideration Liability [Member]
Contingent Consideration Liability [Member]
Depreciation and amortization
US Treasury and Government [Member]
U.S. Government Agency Bonds [Member]
Statement of Comprehensive Income [Abstract]
Maximum [Member]
Statistical Measurement [Axis]
Weighted Average Exercise Price, Exercised (in dollars per share)
Less: non-current portion
Deferred extended warranty revenue
us-gaap_ContractWithCustomerLiabilityNoncurrent
Accumulated amortization
us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Warranty provision
gnss_ProductWarrantyAccrualIncreaseDecreaseForNewWarrantiesIssuanceAndAdjustmentPreexistingWarranties
Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to new warranties issuance and preexisting product warranties.
Percentage points added to the reference rate to compute the variable rate on the debt instrument when repayment of debt in cash and issuance of stocks.
Debt Instrument, Basis Spread On Variable Rate, When Repayment In Cash And Issuance Of Shares
Debt instrument, basis spread on variable rate, when repayment in cash and issuance of shares
Common stock, $0.00001 par value; 100,000,000 shares authorized; 44,631,030 and 36,611,240 shares issued and outstanding, respectively
Common stock, $0.00001 par value; 100,000,000 shares authorized; 45,161,172 and 44,631,030 shares issued and outstanding, respectively
Consolidation, Policy [Policy Text Block]
Principles Of Consolidation
Income tax reconciliation tax impact of acquisition accounting.
Income Tax Reconciliation Tax Impact of Acquisition Accounting
Tax impacts of Evertel acquisition accounting
Net operating loss carryforwards
us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]
Obligation to Issue Common Stock [Member]
Related to obligation to issue common stock.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]
Impairment Of Long-lived Assets
Amortization of debt issuance costs
Share-Based Payment Arrangement, Option, Exercise Price Range [Line Items]
Term loan and warrant liabilities.
Term Loan and Warrant Liabilities [Line Items]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
Other Nonoperating Income (Expense) [Abstract]
Other expenses
Extended Product Warranty, Policy [Policy Text Block]
Warranty Reserves
Percentage of original issue discount under debt instrument.
Debt Instrument, Original Issue Discount Percentage
Debt instrument, original issue discount percentage
Entity Public Float
dei_EntityPublicFloat
gnss_InvestmentsTypicalPortfolioWeightedAverageMaturity
Represents the portfolio weighted average maturity that the Company generally does not exceed with regard to the financial instruments in which it invests.
Investments typical portfolio weighted average maturity month
Volatility (Rate)
Preferred stock, shares authorized (in shares)
Preferred stock, shares authorized
Finite-Lived Intangible Assets by Major Class [Axis]
Shares retained for payment of taxes in connection with settlement of restricted stock units
us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss
Unrealized loss position, gross unrealized loss
Unrealized loss position, gross unrealized loss
State business credit utilization
gnss_IncomeTaxReconciliationStateBusinessCreditUtilization
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 state business credit utilization.
Revenue from Contract with Customer [Text Block]
Revenue Recognition
Business Combination [Table]
Share-Based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit
Lower exercise price
Entity Registrant Name
dei_EntityRegistrantName
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Debt securities, available-for-sale, accumulated gross unrealized loss, before tax
Unrealized Loss
Unrealized Loss
Entity Voluntary Filers
dei_EntityVoluntaryFilers
Customer Concentration Risk [Member]
Customer Concentration Risk
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2027
Other income, net
Other expense,net
Other expenses, net
Additional paid-in capital
State
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price
Exercisable, weighted average exercise price
Cybersecurity Risk Management Positions or Committees Responsible [Flag]
Deposits for inventory
gnss_DepositsForInventory
Represents amount of asset related to consideration paid in advance for deposits for inventory that provides economic benefits.
Deposits for inventory
Consolidated Entities [Domain]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2028
Provision (benefit) for income taxes
Income tax expense
Income Tax Expense (Benefit)
Income tax expense (benefit)
Measurement Frequency [Axis]
gnss_StockUsedAsConsiderationOfOptionExercises
Number of shares used as consideration of option exercises.
Stock used as consideration of option exercises
Proceeds from Issuance of Common Stock
Proceeds from offering of common stock, net of issuance costs
Business Combination, Contingent Consideration, Type [Axis]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Summary of Fair Value Assumptions Applied in Determining Initial Fair Value and Subsequent Fair Value of Warrant Liabilities
Entity Common Stock, Shares Outstanding (in shares)
dei_EntityCommonStockSharesOutstanding
Concentration Risk, Credit Risk, Policy [Policy Text Block]
Concentration Of Credit Risk
US States and Political Subdivisions Debt Securities [Member]
Municipal Securities [Member]
Liability Class [Axis]
Increase in Lease Liability with 10% Increase in Index
gnss_IncreaseInLeaseLiabilityWith10IncreaseInIndex
The amount of increase in lease liability with every 10% increase in index.
Accumulated other comprehensive loss
Accumulated other comprehensive income (loss)
Consolidation Items [Axis]
Schedule of Income before Income Tax, Domestic and Foreign [Line Items]
Schedule of income before income tax, domestic and foreign.
Capital expenditures
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Number of Shares Granted (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period
Total assets
Total assets
Assets
Total assets
Inventories
Inventory, Policy [Policy Text Block]
Property, Plant and Equipment [Table]
Customer Deposits, Current
Customer deposits
Income Statement [Abstract]
Share-Based Payment Arrangement [Policy Text Block]
Share-based Compensation
Dues and subscriptions
gnss_DueAndSubscription
Amount of asset related to consideration paid in advance for due and subscription that provides economic benefits within a future period of one year or the normal operating cycle, if longer.
Total deferred provision
us-gaap_DeferredIncomeTaxExpenseBenefit
Selling, General and Administrative Expenses [Member]
Selling, General and Administrative [Member]
Stock Issued During Period, Shares, New Issues
Issuance of common stock upon offering, net of issuance costs (in shares)
Depreciation, Depletion, and Amortization [Policy Text Block]
Equipment And Depreciation
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Number of Shares Vested (in shares)
Business Combination [Abstract]
Diluted (loss)income per share (in dollars per share)
Earnings Per Share, Diluted, Total
Net loss per common share - diluted (in dollars per share)
Diluted loss per share
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Segment Reporting Information by Segment
Operating Segments [Member]
Finite-Lived Intangible Asset, Expected Amortization, Year Five
2030
Title of Individual [Domain]
Release of obligation to issue common stock (in shares)
The number of shares of stock released from the obligation to issue during the period.
City Area Code
dei_CityAreaCode
Business Combination, Consideration Transferred, Liabilities Incurred
Acquisition holdback liability
Holdback liability payable in connection with the Evertel acquisition
Accumulated other comprehensive income
Accumulated other comprehensive income
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Date
Share-based compensation arrangement by share-based payment award, expiration date
Auditor Name
dei_AuditorName
Restricted cash, current portion
us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue
Debt Instrument, Face Amount
Debt instrument, face amount
Business Combination [Line Items]
Counterparty Name [Domain]
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Operating Lease, Weighted Average Remaining Lease Term
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]
Term loan and warrant liabilities.
Term Loan and Warrant Liabilities [Table]
Segment Reporting Information [Line Items]
Business Combination, Acquiree's Revenue since Acquisition Date, Actual
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Share Buyback Program [Member]
Represents the share buyback program.
Range Seven [Member]
Range Seven [Member]
Shares retained for payment of taxes in connection with the exercise of stock options
Amount of cash outflow to satisfy grantee's tax in connections with exercise of stock options withholding obligation for award under share-based payment arrangement.
Shares retained for payment of taxes in connection with the exercise of stock options
Deferred Revenue [Member]
Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Cash and Cash Equivalents, Policy [Policy Text Block]
Cash, cash equivalents and restricted cash
us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable
Common stock issued
Business combination, consideration transferred, equity interests issued and issuable
Property and equipment, net
Property and equipment, net
Issuance of common stock upon vesting of restricted stock units
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows
Cash, cash equivalents and restricted cash, beginning of period
Cash, cash equivalents and restricted cash, end of period
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
(Loss) income from operations
Loss from operations
Loss from operations
Currency translation, goodwill
Currency translation
Operating lease right of use asset gain (loss)
Operating lease right of use asset gain (loss)
Operating Lease Right Of Use Asset Gain (Loss)
Retained Earnings [Member]
Accumulated Deficit [Member]
Business Combination, Contingent Consideration, Type [Domain]
Stock-based compensation
Share-based compensation
Measurement Input, Price Volatility [Member]
Measurement input, price volatility [Member]
Accrued and Other Liabilities [Line items]
Accrued and Other Liabilities.
Payments of Stock Issuance Costs
Payments of stock issuance costs
Stock issuance costs
Debt Instrument Maximum Additional Term Loans Amount
Debt instrument maximum additional term loan amount.
Debt instrument maximum additional term loan amount
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Unrealized loss position, less than 12 months, fair value
Shipping and Handling [Member]
Other Nonoperating Expense
Other
Operating Lease, Weighted Average Discount Rate, Percent
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Less non-current portion
Operating lease liabilities, noncurrent
Fair Value, Inputs, Level 1 [Member]
Level 1 [Member]
Class of Stock [Line Items]
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash provided by financing activities
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]
Auditor Location
dei_AuditorLocation
Developed Technology Rights [Member]
Technology [Member]
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Summary of Changes in Fair Value of Warrant Liabilities Level 3
Derivative Liability, Noncurrent
Warrant liability
Goodwill [Table]
Business Combination, Recognized Asset Acquired, Receivable, Current
Accounts receivable
Currency translation
Debt instrument, redemption of debt percentage of principal amount
Amount of redemption of debt within one year as percentage of principal amount of the debt.
Debt Instrument, Redemption Of Debt Percentage Of Principal Amount
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax and Reclassification Adjustment, Attributable to Parent
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, after Tax and Reclassification Adjustment, Attributable to Parent, Total
Change in fair value of Term Loans related to credit risk
Change in fair value related to credit risk in other comprehensive income
Non-US [Member]
Americas (excluding the United States)
Change in unrealized loss on marketable securities
The noncash amount of unrealized gain (loss) on investment in marketable security.
Corporate Debt Securities [Member]
Corporate Bonds [Member]
Income Tax Authority [Domain]
Entity Interactive Data Current
dei_EntityInteractiveDataCurrent
Income Statement Location [Domain]
Operating Activities:
Furniture and Fixtures [Member]
Amount of repayment of debt interest in cash as percentage.
Debt Instrument, Repayment Of Interest, Percentage In Cash
Debt instrument, repayment of interest, percentage in cash
Recent Accounting Pronouncements
Accretion (Amortization) of Discounts and Premiums, Investments
(Amortization) accretion of investment of marketable securities
us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Business acquisition, equity interest issued or issuable, number of shares (in shares)
Obligation to issue common stock in Evertel acquisition (in shares)
us-gaap_ContractWithCustomerAssetNet
Contract with customer, asset, after allowance for credit loss, total
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings
Change in fair value related to non-credit risk recorded within net loss
Change in fair value within net loss
Common Stock, Dividends, Per Share, Declared
Common stock, dividends, per share, declared (in dollars per share)
Genasys Spain [Member]
Represents Genasys Spain.
us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Share-based payment arrangement, expense, tax benefit
Entity Tax Identification Number
Revenues:
us-gaap_SharePrice
Share price
Income Tax Authority, Name [Domain]
Local Phone Number
dei_LocalPhoneNumber
Management [Member]
Share-Based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding
Number outstanding (in shares)
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions
Share-based payment arrangement, nonvested award, option, cost not yet recognized, amount
Short-Term Lease, Cost
us-gaap_ShortTermLeaseCost
Weighted average common shares outstanding:
Auditor Opinion
Auditor Opinion [Text Block]
Revenue, Remaining Performance Obligation, Percentage
us-gaap_RevenueRemainingPerformanceObligationPercentage
Long-lived assets
Long-lived assets
Total long lived assets
Accounting Policies [Abstract]
gnss_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesNetShareSettlementTransaction
The number of options exercised in a net share settlement transaction.
Share-based compensation arrangement by share-based payment award, options, exercises, net share settlement transaction
Disaggregation of Revenue [Line Items]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2029
gnss_AdjustmentsRelatedToTaxWithholdingForCashlessShareBasedCompensation
Amount of decrease to equity for cashless grantee's tax withholding obligation for award under share-based payment arrangement.
Shares retained for payment of taxes in connection with cashless exercise of stock options
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share-based compensation arrangement by share-based payment award, number of shares available for grant
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition
Stock, Class of Stock [Table]
Entity Emerging Growth Company
Indefinite-Lived Intangible Assets [Axis]
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill
Net assets acquired