75000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - UNAUDITED CONDENSED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - UNAUDITED CONDENSED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - UNAUDITED CONDENSED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - UNAUDITED CONDENSED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - UNAUDITED CONDENSED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Organization, liquidity and going concern and basis of presentation link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - Accrued Expenses link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Convertible Preferred Stock and Stockholders' Deficit link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Accrued Expenses (Tables) link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Convertible Preferred Stock and Stockholders' Deficit (Tables) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Organization, liquidity and going concern and basis of presentation (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Summary of Significant Accounting Policies (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Summary of Significant Accounting Policies - Calculation of Diluted Net Loss Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Fair Value Measurements Summary of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Accrued Expenses - Schedule of accrued expenses (Details) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Convertible Preferred Stock and Stockholders' Deficit (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Convertible Preferred Stock and Stockholders' Deficit - Schedule of Company's stock option activity (Details) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Convertible Preferred Stock and Stockholders' Deficit - Schedule of Stock-based compensation expense recognized for all equity awards (Details) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Convertible Preferred Stock and Stockholders' Deficit - Schedule of Stock-based compensation expense recognized for all equity awards (Details) [Default] link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Commitments and Contingencies (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - Segment Information -Schedule of Segment Profit or Loss, Including Significant Segment Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Segment Information (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Subsequent Events (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink Share-Based Payment Arrangement, Expensed and Capitalized, Amount Share-Based Payment Arrangement, Expensed and Capitalized, Amount, Total Total stock-based compensation expense Convertible Preferred Stock, Shares Issued upon Conversion Convertible preferred stock Common Stock, Capital Shares Reserved for Future Issuance Common stock reserved for issuance Common stock, available for issuance Schedule of Accrued Liabilities [Table Text Block] Schedule of Accrued expenses Operating Lease, Liability Operating Lease, Liability, Total Operating lease liability, current Temporary Equity, Shares Authorized Temporary Equity, Shares Authorized Dividends, Cash Dividends, Cash, Total Dividends Cash BH Five Lakh One Thousand Two Hundred Eighty Four [Member] BH Five Lakh One Thousand Two Hundred Eighty Four [Member] BH-501284 [Member] Commitments and Contingencies Commitments and contingencies (Note 6) Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Weighted average common shares outstanding, Diluted APIC, Share-Based Payment Arrangement, Increase for Cost Recognition APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total Stock-based compensation expense Minimum [Member] Minimum [Member] Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding Fair Value, Recurring [Member] Fair Value, Recurring [Member] Common Stock, Shares, Issued Common Stock Shares Issued Segment Reporting [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Exercisable Other Nonoperating Income Interest income, net Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Operating Segments [Member] Table Text Block [Abstract] Accrued Liability Subsequent Event Type [Domain] General and Administrative Expense General and Administrative Expense, Total General and administrative Income Statement [Abstract] BH-30643 [Member] BH Thirty Thousand Six Hundred Forty Three [Member] BH Thirty Thousand Six Hundred Forty Three [Member] Earnings Per Share, Basic Earnings Per Share, Basic, Total Net loss per share, Basic Document Period End Date Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses Series B Preferred Stock [Member] Series B Preferred Stock [Member] Payments to Acquire Property, Plant, and Equipment Payments to Acquire Property, Plant, and Equipment, Total Purchases of property and equipment Investment Owned, Balance, Shares Total number of shares available Common Stock, Shares Authorized Common stock shares authorized Statement of Stockholders' Equity [Abstract] Non Cash Lease Expense Non Cash Lease Expense Non-cash lease expense Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Dividends Payable Dividends Payable Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Supplemental Cash Flow Elements [Abstract] Supplemental disclosure of noncash activities: Assets Total assets Title of 12(b) Security Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options, Amount Series Angel convertible preferred stock [Member] Series Angel Convertible Preferred Stock [Member] Series Angel Convertible Preferred Stock [Member] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Schedule of Stock-based compensation expense recognized for all equity awards Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Granted Options Preferred Stock, Convertible, Conversion Price Preferred Stock, Convertible, Conversion Price Preferred Stock, Convertible, Conversion Price, Increase Cash and Cash Equivalents [Domain] Segment Reporting [Table Text Block] Schedule of Segment Profit or Loss, Including Significant Segment Expenses Increase (Decrease) in Operating Lease Liability Operating lease liabilities Exercise Liability Exercise Liability Exercise liability Equity, Attributable to Parent Beginning Balance, Amount Ending Balance, Amount Total stockholders' deficit Entity Address, Address Line Two Other Assets, Noncurrent Other assets Number of Reportable Segments Number of Reportable Segments Stockholders' Equity Note [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Temporary Equity, Par or Stated Value Per Share Temporary Equity, Per Share Emerging Growth Company Policy [Policy Text Block] Emerging Growth Company Policy Policy Text Block Emerging Growth Company Status Proceeds from the exercise of stock options Proceeds from Stock Options Exercised Organization, Liquidity And Going Concern [Line Items] Organization, Liquidity And Going Concern [Line Items] Increase (Decrease) in Accrued Salaries Accrued compensation Statistical Measurement [Axis] Money Market Funds [Member] Money Market Funds [Member] Entity Interactive Data Current Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Common Stock, Value, Issued Common stock, $0.0001 par value; 110,000,000 shares authorized at June 30, 2026 and December 31, 2025; 2,767,806 and 2,548,614 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively. Liabilities Total liabilities Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Total Accumulated deficit Accumulated deficit Convertible Preferred Stock [Member] Convertible Preferred Stock [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Other income (expense), net: Other Nonoperating Income (Expense) [Abstract] Accounts payable Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable, Total Operating Expenses Total operating expenses Preferred Stock, Convertible, Shares Issuable Convertible preferred stock Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Stock Issued During Period, Shares, New Issues Common stock shares issued IPO [Member] IPO [Member] Cash Equivalents [Member] Cash Equivalents [Member] Temporary Equity, Carrying Amount, Attributable to Parent Convertible preferred stock, $0.0001 par value; 85,552,612 shares authorized at June 30, 2026 and December 31, 2025; 18,258,960 shares issued and outstanding at June 30, 2026 and December 31, 2025; 257,153 aggregate liquidation preference at June 30, 2026 and December 31, 2025 Subsequent Events [Text Block] Subsequent Events Other Income Other income Total other income, net Fair Value Hierarchy and NAV [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Number of Shares, Period Increase (Decrease) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Number of Shares, Period Increase (Decrease), Total Total number of shares available Assets, Fair Value Disclosure [Abstract] Assets: Payments of Stock Issuance Costs Payment of Stock Issuance Costs Plan Two [Member] Plan Two [Member] Plan Two [Member] Share Based Compensation Arrangement By Share Based Payment Award Options Expired DuringPeriod Share Based Compensation Arrangement By Share Based Payment Award Options Expired DuringPeriod Expired Options Other expense, net Other Nonoperating Expense Other expense, net Liabilities and Equity Total liabilities, convertible preferred stock and stockholders' deficit Research and Development Expense Research and Development Expense, Total Research and development expenses Research and development Document Fiscal Period Focus Sale of Stock [Axis] Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net increase (decrease) in cash and cash equivalents Entity Current Reporting Status Use of Estimates Use of Estimates, Policy [Policy Text Block] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Class of Stock [Domain] Accounts Payable, Current Accounts Payable, Current, Total Accounts payable Assets, Fair Value Disclosure Assets, Fair Value Disclosure, Total Assets, fair value Document Transition Report Organization Liquidity And Going Concern Table Organization Liquidity And Going Concern Table Condensed Financial Statements [Table] Commitments and Contingencies Disclosure [Abstract] Subsequent Event [Line Items] Liabilities, Current [Abstract] Current liabilities: Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Unrecognized compensation cost Common Stock [Member] Common Stock [Member] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Statistical Measurement [Domain] Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation Weighted-average shares subject to repurchase Stockholders' deficit: [Abstract] Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic, Total Weighted average common shares outstanding, Basic Operating Lease, Expense Rent expense Accounts Payable and Accrued Liabilities, Current Total accrued expenses Entity Central Index Key Other Liabilities, Current Other current liabilities Consolidation Items [Axis] Current Fiscal Year End Date Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Accrued Liabilities, Total Accrued expenses Document Quarterly Report Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Cash and Cash Equivalents [Axis] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Net cash used in operating activities Net cash used in operating activities Entity Incorporation, State or Country Code Earnings Per Share, Diluted Earnings Per Share, Diluted, Total Net loss per share, Diluted Options to Purchase Common Stock [Member] Options to Purchase Common Stock [Member] Options to Purchase Common Stock [Member] Stockholders' Equity, Policy [Policy Text Block] Common Stock Valuation Preferred Stock, Par Value Per Share Preferred Stock, Par or Stated Value Per Share Net loss Net loss Net loss Increase (Decrease) in Other Operating Assets Increase (Decrease) in Other Operating Assets, Total Other assets Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Stock Option Exercise Price Percent Stock Option Exercise Price Percent Stock option exercise price Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Organization, liquidity and going concern and basis of presentation Measurement Frequency [Domain] Equity Components [Axis] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Cash flows from investing activities: Other Commitments [Line Items] Statement of Cash Flows [Abstract] Fair Value Hierarchy and NAV [Domain] Stockholders' Equity, Reverse Stock Split Reverse stock split Deferred Offering Costs Deferred offering costs Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of cash equivalents measured at fair value Fair Value Disclosures [Text Block] Fair Value Measurements Stock Issued During Period, Shares, Restricted Stock Award, Gross Vesting of restricted common stock, Shares Class of Stock [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Total Total Deferred Charges, Policy [Policy Text Block] Deferred Offering Costs Temporary Equity, Shares Outstanding Temporary Equity, Shares Outstanding Proceeds from Issuance Initial Public Offering Proceeds from Issuance Initial Public Offering Accrued Liabilities, Current Accrued Liabilities, Current, Total Accrued compensation Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Outstanding Options, Ending Balance Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Outstanding Options, Beginning Balance Document Type Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Cash flows from operating activities: Subsequent Event [Member] Operating Income (Loss) Loss from operations Loss from operations Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block] Schedule of Net Loss per Share Sale of Stock, Price Per Share Public offering price Segment Reporting [Table] Asset Class [Domain] Entity File Number Location, Statement of Income, Balance [Axis] Retained Earnings [Member] Accumulated Deficit [Member] Entity Registrant Name Accounting Policies [Abstract] Depreciation Depreciation, Total Depreciation expense Other Operating Segment [Member] Other Projects [Member] Entity Address, Address Line One Exercised Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Exercise of stock options, Shares Exercised Option BH-30236 [Member] BH Thirty Thousand Two Hundred Thirty Six [Member] BH Thirty Thousand Two Hundred Thirty Six [Member] Aggregate net proceeds from the IPO Proceeds from Issuance or Sale of Equity Proceeds from Issuance or Sale of Equity, Total Gross proceeds to the Company Deferred financing costs included in accounts payable and accrued expenses Deferred Financing Costs Included in Accounts Payable and Accrued Expenses Deferred Financing Costs Included in Accounts Payable and Accrued Expenses Assets, Current Total current assets Total current assets Fair Value, Recurring and Nonrecurring [Table] Net Loss per Share Earnings Per Share, Policy [Policy Text Block] Segments [Axis] Entity Small Business Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Consolidation Items [Domain] Payment of Financing and Stock Issuance Costs Payment of Financing and Stock Issuance Costs, Total Earnings Per Share [Abstract] Share-Based Payment Arrangement, Option, Activity [Table Text Block] Schedule of Company's stock option activity 2020 Equity Incentive Plan [Member] Two Thousand Twenty Equity Incentive Plan [Member] Two Thousand Twenty Equity Incentive Plan [Member] Plan Name [Axis] Subsequent Event Type [Axis] Equity [Text Block] Convertible Preferred Stock and Stockholders' Deficit Stock Option Exercises Amount Stock Option Exercises Amount Amounts related to option exercises Measurement Frequency [Axis] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Accrued Liabilities, Current [Abstract] Entity Tax Identification Number Equity Component [Domain] Entity Address, City or Town Segments [Domain] Entity Common Stock, Shares Outstanding Equity Incentive Plan [Member] Equity Incentive Plan [Member] Equity Incentive Plan [Member] Statement [Table] Entity Shell Company Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Statement [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Maximum [Member] Maximum [Member] Sale of Stock [Domain] Temporary Equity, Shares Issued Temporary Equity, Shares Issued Unaudited Condensed Consolidated Interim Financial Information Consolidation, Policy [Policy Text Block] Subsequent Events [Abstract] Asset Class [Axis] Non Project Specific Research and Development Expenses [Member] Non Project Specific Research and Development Expenses [Member] Non Project Specific Research and Development Expenses [Member] Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract] Adjustments to reconcile net loss to net cash used in operations Assets, Current [Abstract] Current Assets: Stock Issued During Period, Value, Restricted Stock Award, Gross Vesting of restricted common stock, Amount Document Fiscal Year Focus Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding Accrued Liabilities Accrued Liabilities, Total Accrued research and development expenses Entity Ex Transition Period Operating Lease, Liability, Noncurrent Operating lease liability, non-current Other Accrued Liabilities, Current Other Security Exchange Name New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Stock Option Awards Vest Over Periods Stock Option Awards Vest Over Periods Stock option awards vest over periods Entity Address, State or Province Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Weighted average period of unrecognized compensation costs Series A Preferred Stock [Member] Series A Preferred Stock [Member] Disclosure Text Block [Abstract] Notes to Financial Statements Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Amendment Flag Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use asset obtained in exchange for operating lease liability Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Other Nonoperating Income (Expense) Total other income, net Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation, Total Cash and cash equivalents at the beginning of period Cash and cash equivalents at the end of period City Area Code Preferred Stock [Member] Preferred Stock [Member] Service Condition Vesting Terms Percentage Service Condition Vesting Terms Percentage Service condition vesting terms percentage Organization, Consolidation and Presentation of Financial Statements [Abstract] Common Stock Subject to Repurchase Rights [Member] Common Stock Subject to Repurchase Rights [Member] Common Stock Subject to Repurchase Rights [Member] Operating Expenses [Abstract] Operating expenses: Common Stock, Par or Stated Value Per Share Common Stock Par Value Per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Vested and expected to vest Liabilities, Current Total current liabilities Total current liabilities Temporary Equity, Liquidation Preference Temporary Equity, Liquidation Preference Segment Reporting [Text Block] Segment Information Trading Symbol Proceeds from Issuance of Convertible Preferred Stock Aggregate gross proceeds of convertible preferred stock Subsequent Event [Table] Entity Emerging Growth Company Additional Paid-in Capital [Member] Additional Paid-In Capital [Member] Plan Name [Domain] Accrued Expenses Accrued Expenses Accrued expenses Other Liabilities, Noncurrent Other long-term liabilities Commissions, and Offering Expenses Commissions, and Offering Expenses Commissions, and offering expenses Cover [Abstract] Plan One [Member] Plan One [Member] Plan One [Member] Share-Based Payment Arrangement, Noncash Expense Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense, Total Additional Paid in Capital Additional Paid in Capital, Total Additional paid-in capital Fair Value Disclosures [Abstract] Cash and Cash Equivalent Cash and Cash Equivalent, Total Cash and cash equivalents Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by financing activities Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Forfeited Options Forfeited Options Entity Filer Category Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization, Total Property and equipment, net Shares, Outstanding Beginning Balance, Shares Ending Balance, Shares Segment Reporting [Abstract] Entity Address, Postal Zip Code Statement of Financial Position [Abstract] Service Condition Vesting Terms Duration Service Condition Vesting Terms Duration Service condition vesting terms duration Local Phone Number