Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Statistical Measurement Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal year Focus Document Fiscal Year Focus Adjustment to Compensation, Amount Adjustment to Compensation Amount Loss contingency, corporate governance reform, period (in years) Loss Contingency, Corporate Governance Reform, Period Loss Contingency, Corporate Governance Reform, Period Financial Instrument [Axis] Financial Instrument [Axis] Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Common stock; $0.00001 par value; 80,000 shares authorized as of September 30, 2026 and December 31, 2025; 29,631 and 29,192 shares issued and outstanding as of September 30, 2026 and December 31, 2025, respectively. Common Stock, Value, Issued 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Schedule of Restricted Stock Awards and Restricted Stock Units Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Taxes paid for employee tax withholding related to restricted stock units and Taxes paid related to settlement of restricted stock awards Payment, Tax Withholding, Share-Based Payment Arrangement Restatement Determination Date Restatement Determination Date Supply Commitment Supply Commitment [Axis] Vesting of restricted stock units, net of shares withheld for taxes (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Cost of goods sold Cost of goods sold Cost Of Goods And Services Sold, Operating Cost Of Goods And Services Sold, Operating Beginning balance Ending balance Accounts Receivable, Allowance for Credit Loss Amendment Flag Amendment Flag Current liabilities Liabilities, Current [Abstract] Provisions Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Gross Unrealized (Losses) Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Loss Contingencies [Table] Loss Contingencies [Table] Leases [Abstract] Deferred income taxes Increase (Decrease) in Deferred Income Taxes Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Entity Address, State or Province Entity Address, State or Province Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent PEO Total Compensation Amount PEO Total Compensation Amount Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Basic (in shares) Weighted-average basic common shares (in shares) Weighted Average Number of Shares Outstanding, Basic Long-term investments Long-Term Investments Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Work-in-process Inventory, Work in Process, Net of Reserves Lease liability Increase Decrease In Lease Liability Increase (decrease) in lease liability. Concentration Risk [Table] Concentration Risk [Table] Entity Address, City or Town Entity Address, City or Town Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Laboratory equipment Lab Equipment [Member] Lab equipment. Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Title of Individual Title and Position [Domain] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Level 2: Fair Value, Inputs, Level 2 [Member] Other income Nonoperating Income (Expense) [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] United States UNITED STATES Subsequent Event Type Subsequent Event Type [Axis] Accounts Receivable, Allowance For Credit Loss [Table] Accounts Receivable, Allowance For Credit Loss [Table] Accounts Receivable, Allowance For Credit Loss [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Amount capitalized Share-Based Payment Arrangement, Amount Capitalized Stock Incentive Plan Stock Incentive Plan [Member] Stock incentive plan. Accounts Receivable, Allowance Segment [Axis] Accounts Receivable, Allowance Segment [Axis] Accounts Receivable, Allowance Segment Recently Issued Accounting Pronouncements, Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Unpaid purchases of property and equipment Capital Expenditures Incurred but Not yet Paid Accrued payroll and benefits Accrued Payroll And Benefits Accrued payroll and benefits. Schedule of Segment Reporting Information, by Segment Segment Reporting [Table Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Future Minimum Operating Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Document Period End Date Document Period End Date Changes in operating assets and liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Cancelled or forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Net cash (used in) investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Denominator: Earnings Per Share, Basic [Abstract] Security Exchange Name Security Exchange Name Prepaid taxes Increase (Decrease) in Prepaid Taxes Long-term accrued rebates Accrued Rebates, Noncurrent Accrued Rebates, Noncurrent Valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Granted (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Accumulated other comprehensive (loss) gain Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Shares reserved (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Current portion of lease liability Operating Lease, Liability, Current Schedule of Changes in Allowances and Discounts Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of Property and Equipment, Net Property, Plant, and Equipment [Table Text Block] Statement of Comprehensive Income [Abstract] Net Income Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Net income per common share: Earnings Per Share [Abstract] Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Document Fiscal Period Focus Document Fiscal Period Focus Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Investment Company, Capital Share Transactions [Abstract] Investment Company, Capital Share Transaction, Increase (Decrease) [Abstract] Total liabilities Liabilities Trading Symbol Trading Symbol Geographical [Domain] Geographical [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Concentration Risk [Line Items] Concentration Risk [Line Items] Supplemental Disclosures of Non-Cash Activities Noncash Investing and Financing Items [Abstract] 2017 IPO Stock Plan 2017 IPO Stock Plan [Member] 2017 IPO Stock Plan Kathryn Romano Trading Arrangement, Common Stock To Be Held [Member] Kathryn Romano Trading Arrangement, Common Stock To Be Held Operating Activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Individual: Individual [Axis] Diluted (in shares) Weighted-average diluted common shares (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Research and Development Arrangement, Contract to Perform for Others, Type [Domain] Research and Development Arrangement, Contract to Perform for Others, Type [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Commercial paper Commercial Paper [Member] U.S. government agency securities US Treasury Securities [Member] Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenue from Contract with Customer [Abstract] Award Timing Predetermined Award Timing Predetermined [Flag] Exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Level 1: Fair Value, Inputs, Level 1 [Member] Schedules of Concentration of Risk, by Risk Factor Schedules of Concentration of Risk, by Risk Factor [Table Text Block] Future minimum operating lease payments Lessee, Operating Lease, Liability, to be Paid Litigation Status [Domain] Litigation Status [Domain] Customer B Customer B [Member] Customer B Dilutive effect of stock options and unvested restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Beginning balance (in usd per share) Ending balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value All Executive Categories All Executive Categories [Member] Accrued construction in progress Accrued Construction In Progress Current Accrued construction in progress current. Accrued inventory Accrued Inventory Accrued Inventory Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other product candidates Other Product Candidates [Member] Other Product Candidates Depreciation Depreciation Plan Name Plan Name [Domain] Beginning balance (in usd per share) Ending balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Right-of-use assets Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer A Customer A [Member] Customer A Schedule of Net Income Per Share Attributable to Common Stockholders Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Segment Information Segment Reporting [Text Block] Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Income Statement Location Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Aggregate Fair Value Cash and Cash Equivalents, Fair Value Disclosure Weighted-average remaining contractual life (Years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted-Average Remaining Contractual Term Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Building and building improvements Building and Building Improvements [Member] Exercisable end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Accrued legal settlement Increase (Decrease) Accrued Legal Settlement And In-Process Research And Development Increase (Decrease) Accrued Legal Settlement And In-Process Research And Development Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Exercise Price Award Exercise Price Investing Activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Vesting of restricted stock units, net of shares withheld for taxes Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Litigation Status [Axis] Litigation Status [Axis] Share repurchase program, authorized, amount Share Repurchase Program, Authorized, Amount Segment Reporting [Line Items] Segment Reporting [Line Items] KB113 KB113 [Member] KB113 Document Quarterly Report Document Quarterly Report Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Settled Litigation Settled Litigation [Member] Europe Europe [Member] Accrued expenses and other current liabilities Accrued Expenses And Other Current Liabilities Accrued expenses and other current Liabilities. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Equity Component Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Adoption Date Trading Arrangement Adoption Date Total stockholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Present value of lease liability Operating Lease, Liability Project management service fee Professional Fees Aggregate fair value, total Cash Cash Equivalents And Debt Securities Available For Sale Cash cash equivalents and debt securities available for sale. Insider Trading Policies and Procedures [Line Items] Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Performance Shares Performance Shares [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Selling, general and administrative Selling, general and administrative Selling, General and Administrative Expense Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Kathryn Romano Trading Arrangement, Chartitable Gift [Member] Kathryn Romano Trading Arrangement, Chartitable Gift Interest and other income, net Interest and other income, net Interest Income (Expense), Nonoperating Cancelled or forfeited (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Number of operating segment Number of Operating Segments Common share equivalents outstanding, excluded from the calculation of diluted net loss per common share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Entity Central Index Key Entity Central Index Key Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Other, net Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Other Item Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Rebates Rebates [Member] Rebates Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation KB111 KB111 [Member] KB111 Stockholders’ equity Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Operating expenses Operating Expenses [Abstract] Deferred tax asset, net of valuation allowance Deferred Income Tax Assets, Net B-VEC B-VEC [Member] B-VEC Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Stock Options Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] City Area Code City Area Code Accounts Receivable, Allowance Segment [Domain] Accounts Receivable, Allowance Segment [Domain] Accounts Receivable, Allowance Segment [Domain] Restricted Stock Restricted Stock [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Amortization of operating lease right-of-use assets Operating Lease, Right-of-Use Asset, Periodic Reduction Schedule of Product Revenue by Region Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue [Table Text Block] Name Forgone Recovery, Individual Name Finished goods Inventory, Finished Goods, Net of Reserves Estimated weighted average period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Balance Sheet Related Disclosures [Abstract] Balance Sheet Related Disclosures [Abstract] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted-Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Statement [Line Items] Statement [Line Items] Total assets Assets KB707 KB707 [Member] KB707 Weighted-average grant-date fair value per share of options granted (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Schedule of Stock-Based Compensation Expense, Net Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Gross Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Accrued expenses and other current liabilities Accounts Payable and Other Accrued Liabilities, Current PEO PEO [Member] Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Cash and Cash Equivalents Cash and Cash Equivalents [Domain] Total stock-based compensation Share-Based Payment Arrangement, Expense Location, Statement of Financial Position, Activity, Capitalization [Axis] Location, Statement of Financial Position, Activity, Capitalization [Axis] Other long-term liabilities Other Liabilities, Noncurrent KB408 KB408 [Member] KB408 Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Issuance of common stock upon exercise of stock options (in shares) Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Granted (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Subsequent Event Type Subsequent Event Type [Domain] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Lease liability Operating Lease, Liability, Noncurrent Total operating expenses Operating Expenses Forfeited/ surrendered for taxes (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value (Accretion) amortization on marketable securities (Accretion) Amortization Expense, Net (Accretion) Amortization Expense, Net Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Unrealized (loss) gain on available-for-sale securities Unrealized (loss) gain on investments OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted (in usd per share) Net income per common share - diluted (in usd per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Net cash provided by (used in) financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Shares of restricted stock awards surrendered for taxes Share-Based Payment Arrangement, Decrease for Tax Withholding Obligation Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accrued rebates Increase (Decrease) in Accrued Rebates Increase (Decrease) in Accrued Rebates Research and development Research and Development Expense Payments/Credits Accounts Receivable, Allowance for Credit Loss, Writeoff Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Financing Activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Product revenue, net Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Debt securities, available-for-sale, term (in years) Debt Securities, Available-for-Sale, Term Financial Instruments [Domain] Financial Instruments [Domain] Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Issuance of common stock upon exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Product Revenue, Accounts Receivable and Reserves for Product Sales Revenue from Contract with Customer [Text Block] Prompt Pay Prompt Pay [Member] Prompt Pay Construction in progress Construction in Progress [Member] Inventory Increase (Decrease) in Inventories Weighted average discount rate (in percent) Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Shares remaining available for grant (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Computer equipment and software Computer Equipment [Member] Title of Individual Title and Position [Axis] Other research and development costs Other Research And Development Cost [Member] Other Research And Development Cost Weighted-Average Remaining Contractual Life (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Cash and cash equivalents Cash [Member] Schedule of Lease Expense Lease, Cost [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Schedule of Cash, Cash Equivalents and Available-for-Sale Securities Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Income from operations Operating Income (Loss) Current Fiscal Year End Date Current Fiscal Year End Date KB304 KB304 [Member] KB304 Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Corporate bonds Corporate Bond Securities [Member] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Weighted-Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Gross margin Operating, Gross Margin Percentage Operating, Gross Margin Percentage Organization Business Description and Basis of Presentation [Text Block] Short-term investments Debt Securities, Available-for-Sale, Current Equity Components Equity Components [Axis] Accounts receivable, net Increase (Decrease) in Accounts Receivable Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Shares of restricted stock awards surrendered for taxes (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Kathryn Romano Trading Arrangement, Common Stock To Be Acquired [Member] Kathryn Romano Trading Arrangement, Common Stock To Be Acquired Subsequent Events [Abstract] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accrued preclinical and clinical expenses Accrued Preclinical And Clinical Expenses Accrued preclinical and clinical expenses. Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Other current liabilities Other Liabilities, Current Other non-current assets Other Assets, Noncurrent Document Type Document Type Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Exercisable, ending balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Supply Commitment Arrangement Supply Commitment Arrangement [Domain] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Arrangement Duration Trading Arrangement Duration Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Schedule of PSU Activity Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Commitments and contingencies (see note 7) Commitments and Contingencies Total property and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Manufacturing equipment Machinery and Equipment [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Furniture and fixtures Furniture and Fixtures [Member] Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Weighted-average remaining contractual life (Years), exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term Inventory Inventory Inventory, Net Award Type Award Type [Domain] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Clinical Supply Agreements Clinical Supply Agreement [Member] Clinical supply agreement. 2026 (remaining three months) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Fair Value Instruments Fair Value Disclosures [Text Block] Supplemental Cash Flow Information Supplemental Cash Flow Information [Abstract] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Leasehold improvements Leasehold Improvements [Member] Reportable Segment Reportable Segment [Member] Reportable Segment Cash, cash equivalents and short-term investments Cash, Cash Equivalents, and Short-Term Investments Income taxes paid Income Tax Paid, before Refund Received Property, Plant and Equipment, Type Long-Lived Asset, Class [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Entity Tax Identification Number Entity Tax Identification Number Exercised (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Accrued professional fees Accrued Professional Fees, Current Accounts payable Increase (Decrease) in Accounts Payable Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Subsequent Event [Table] Subsequent Event [Table] Stock-based compensation expense, net Share-Based Payment Arrangement, Noncash Expense Total lease expense Lease, Cost KB803 KB803 [Member] KB803 Customer [Domain] Customer [Domain] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Leases Lessee, Operating Leases [Text Block] Basic (in usd per share) Net income per common share - basic (in usd per share) Earnings Per Share, Basic Insurance proceeds Proceeds from Insurance Settlement, Operating Activities Laurent Goux [Member] Laurent Goux Total current assets Assets, Current Statistical Measurement Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Accrued rebates Accrued Rebates, Current Accrued Rebates, Current Research and development Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts receivable, net Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Aggregate Fair Value Debt Securities, Available-for-Sale Operating lease expense Operating Lease, Cost Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Percent of Accounts Receivable, Net (in percent) Concentration Risk, Percentage Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and stockholders’ equity Liabilities and Equity Variable lease expense Variable Lease, Cost Realized gain on investments Realized Investment Gains (Losses) Stock Options Share-Based Payment Arrangement, Option [Member] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name Plan Name [Axis] Tabular List, Table Tabular List [Table Text Block] Additional paid-in capital Additional Paid in Capital Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name Purchases of investments Payments to Acquire Investments Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate intrinsic value, beginning balance, outstanding Aggregate intrinsic value, ending balance, outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Forfeited/surrendered for taxes (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Four Lessee, Operating Lease, Liability, to be Paid, after Year Four Property, Plant and Equipment, Type Long-Lived Asset, Class [Domain] Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Amortized Cost Cash Cash Equivalents And Debt Securities Available For Sale Amortized Cost Cash cash equivalents and debt securities available for sale amortized cost. Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Kathryn Romano [Member] Kathryn Romano Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Prepaid taxes Prepaid Taxes Aggregate Available Trading Arrangement, Securities Aggregate Available Amount KB801 KB801 [Member] KB801 Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Director Director [Member] KB407 KB407 [Member] KB407 Period increase in shares authorized (in percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized, Period Increase, Percent Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized, Period Increase, Percent Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Raw materials Inventory, Raw Materials, Net of Reserves Depreciation expense capitalized Depreciation Expense Capitalized Depreciation Expense Capitalized Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Company Selected Measure Amount Company Selected Measure Amount Entity Address, Address Line Two Entity Address, Address Line Two Current assets Assets, Current [Abstract] Weighted average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Initial recognition of right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Accounts Receivable, Allowance For Credit Loss [Line Items] Accounts Receivable, Allowance For Credit Loss [Line Items] Accounts Receivable, Allowance For Credit Loss [Line Items] Maturities of investments Proceeds from Sale, Maturity and Collection of Short-Term Investments Income tax (expense) benefit Income tax (expense) benefit Income tax (expense) benefit Income Tax Expense (Benefit) Other Accruals Other Accruals [Member] Other Accruals Adjustments to reconcile net income to net cash provided by operating activities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Accounts Receivable Net Benchmark Accounts Receivable, Net Benchmark [Member] Accounts Receivable, Net Benchmark Net income Net income Net income Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Balance Sheet Location Location, Statement of Financial Position, Balance [Axis] Proceeds from disposal of assets Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Certificates of deposit Certificates of Deposit [Member] Exercisable end of period (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Cash and Cash Equivalents Cash and Cash Equivalents [Axis] Japan JAPAN Accrued taxes Accrued Income Taxes Accounts Receivable, Allowance For Credit Loss [Roll Forward] Accounts Receivable, Allowance For Credit Loss [Roll Forward] Accounts Receivable, Allowance For Credit Loss Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]