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Security in continuous unrealized loss position, more than 12 months, fair value Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Entity Current Reporting Status Operating expenses: Operating Expenses [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common stock, authorized (in shares) Common Stock, Shares Authorized Percentage of increase in common stock reserved for issuance Percentage of number of shares of common stock outstanding Percentage of increase in the number of shares of the Company's common stock reserved for issuance to total number of shares of the Company's common stock outstanding . 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Accrued And Current Liabilities [Abstract] Purchases of marketable securities Payments to Acquire Marketable Securities Long-Lived Tangible Asset [Axis] Pre-Funded Warrants Issued Year Pre-funded warrants issued year. Issued Year Employee stock purchase plan expense APIC, Share-Based Payment Arrangement, ESPP, Increase for Cost Recognition Cash Cash and Cash Equivalents, Fair Value Disclosure Shares Issued, Price Per Share Purchase price Documents Incorporated by Reference [Text Block] Interest income Investment Income, Interest Senior Secured Loan Facility Senior Secured Loan Facility [Member] Senior Secured Loan Facility. Other assets and long-term deposits Increase Decrease In Other Non Current Assets And Long Term Deposits Increase decrease in other non current assets and long term deposits. Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Prefunded Warrants [Member] Prefunded warrants. Pre-Funded Warrants Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Schedule of Basic and Diluted Net Loss Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Net loss per share, basic (in dollars per share) Earnings Per Share, Basic, Total Net loss per share, basic Earnings Per Share, Basic Milestone payments to be paid to collaborative partner Collaborative Arrangement Aggregate Maximum Milestone Payments To Be Paid To Collaborative Partner In the aggregate, the maximum milestone payments to be paid to the collaborative partner. 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Organization, Consolidation and Presentation of Financial Statements [Abstract] Amount available for draw down upon achieving certain milestones related to execution of first line pivotal phase 3 Loan Facility Amount Available Upon Achieving Certain Milestones Related to Execution of First Line Pivotal Phase 3 Loan facility amount available upon achieving certain milestones related to execution of first line pivotal phase 3. 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Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Common Stock Common Stock [Member] Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Interest receivable Interest Receivable, Current Debt Securities, Available-for-Sale [Line Items] Entity Address, Address Line One Schedule of Fair Value Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Fair Value Hierarchy and NAV [Axis] Earnings Per Share [Abstract] Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information Foreign Currency Transactions Foreign Currency Transactions and Translations Policy [Policy Text Block] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Class of Warrant or Right [Axis] Document Type Document Type Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Domain] Sales Agreement Sales Agreement [Member] Sales Agreement. CIK Entity Central Index Key Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Net decrease in cash and cash equivalents Subsequent Event Type [Domain] Anti-dilutive securities Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Other Assets and Long-Term Deposits Other Assets And Long Term Deposits [Text Block] Other assets and long term deposits. 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Stock-based compensation expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Current Fiscal Year End Date Document Quarterly Report Internal Use Software, Policy [Policy Text Block] Internal-Use Software Prepaid Expenses and Other Current Assets [Text Block] Prepaid Expenses and Other Current Assets The entire disclosure for prepaid expenses and other current assets. 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Other Other Assets, Noncurrent Antidilutive Securities [Axis] Intrinsic Value of expected to vest options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) Cash [Member] Cash Gross proceeds of private placement Proceeds from Issuance of Private Placement Gross The gross cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. Cash and Cash Equivalents [Domain] Increase (Decrease) in Stockholders' Equity [Roll Forward] Preferred Stock, Value, Issued Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of March 31, 2025 and December 31, 2024; no shares issued and outstanding as of March 31, 2025 and December 31, 2024. Minimum Minimum [Member] Financial Instrument [Axis] Current assets: Assets, Current [Abstract] Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Current liabilities: Liabilities, Current [Abstract] Accrued research and development related costs Accrued Research and Development Expenses, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for research and development expenses. Other Current Liabilities [Table Text Block] Schedule of Accrued and Other Current Liabilities Balances, at Beginning of period (in shares) Balances, at End of period (in shares) Shares, Outstanding Schedule of Other Assets and Long-Term Deposits Other Assets And Long Term Deposits [Table Text Block] Other assets and long term deposits. Commitments and Contingencies Commitments and contingencies (Note 10) Leases Lessee, Leases [Policy Text Block] Common stock outstanding percentage Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Incremental Shares Added To Shares Available For Issuance Share based compensation arrangement by share based payment award percentage of incremental shares added to shares available for issuance. General and administrative General and Administrative Expense [Member] Lease liabilities Total lease liabilities at present value Operating Lease, Liability Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] Sale of stock consideration remained available for issuance. Sale Of Stock Consideration Remained Available For Issuance Sale of stock consideration remained available for issuance Loss Contingencies [Table] Weighted average shares used to compute net loss per share, basic (in shares) Weighted Average Number of Shares Outstanding, Basic, Total Weighted average shares used to compute net loss per share, basic Weighted Average Number of Shares Outstanding, Basic Document Information [Line Items] Other current liabilities Increase (Decrease) in Other Current Liabilities Segment Reporting, Expense Information Used by CODM, Description Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Security in continuous unrealized loss position, more than 12 months, accumulated Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Long-Lived Tangible Asset [Domain] Net proceeds of private placement Proceeds from Issuance of Private Placement Proceeds from equity private placement, net of issuance costs of $240 APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Stock-based compensation expense, including employee stock purchase plan expense Total stockholders' equity Balances, at Beginning of period Balances, at End of period Equity, Attributable to Parent Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Statement of Stockholders' Equity [Abstract] Use of Estimates Use of Estimates, Policy [Policy Text Block] Fair Value Measurement Fair Value Disclosures [Text Block] Research Contract Costs and Accruals Research Contract Costs and Accruals, Policy [Policy Text Block] Disclosure of accounting policy for research contract costs and accruals . Warrants and Rights Note Disclosure [Abstract] Novartis Agreement Information related to Novartis Agreement. Number of shares Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Debt Instrument, Name [Domain] Clinical Development and Regulatory Milestones [Member] Clinical development and regulatory milestones. Clinical Cevelopment and Regulatory Milestones Accrued and current liabilities. Accrued And Current Liabilities [TextBlock] Accrued and Other Current Liabilities Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Plan Name [Domain] Internal-Use Software Software and Software Development Costs [Member] Other assets Increase (Decrease) in Other Operating Assets, Total Increase (Decrease) in Other Operating Assets Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Entity [Domain] Options vested and exercisable as at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Nature of the Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] System Implementation Costs Noncurrent System implementation costs noncurrent. System implementation costs Class of Warrant or Right, Outstanding Number of Warrants Outstanding Milestone Achievement [Domain] Milestone Achievement [Domain] Organization, Consolidation and Presentation of Financial Statements [Table] Organization, consolidation and presentation of financial statements. Future minimum lease payments Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive (loss) gain: Class of Warrant or Right [Table] Long-term Marketable Securities Long Term Marketable Securities [Member] Long term marketable securities. Prepaid subscriptions and licenses Prepaid Subscriptions And Licenses Amount of asset related to consideration paid in advance for subscriptions and licenses that provides economic benefits within a future period of one year or the normal operating cycle, if longer. Area of property Area of Real Estate Property Entity Address, City or Town Number of reportable segments Number of Reportable Segments Security Exchange Name Counterparty Name [Axis] Options expected to vest as at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Accrued Corporate Related Costs current Accrued corporate related costs current. Accrued corporate related costs Antidilutive Securities, Name [Domain] Organization, Consolidation and Presentation of Financial Statements [Line Item] Organization, consolidation and presentation of financial statements. Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Total 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 Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Statistical Measurement [Domain] Class of Warrant or Right, Exercise Price of Warrants or Rights Exercise price of warrant Exercise Price Assets, Current Total current assets Stock-based compensation expense Total stock-based compensation expense Share-Based Payment Arrangement, Expense Aggregate gross proceeds commission Percentage Of Aggregate Gross Proceeds Commission Percentage of aggregate gross proceeds commission. Period End Date Document Period End Date Fair Value Hierarchy and NAV [Domain] Statement of Financial Position [Abstract] Antidilutive Security, Excluded EPS Calculation [Table] Novartis Pharma Agreement Novartis Pharma Agreement [Member] Novartis pharma agreement Pre-Funded Warrants Issued Date Pre-Funded Warrants Issued Date. Issue Date Total liabilities Liabilities Financial Instruments [Domain] Summary of Lease Term and Discount Rate Summary of Lease Term and Discount Rate [Table Text Block] Tabular disclosure of lease term and discount rate of lessee's operating lease. Lessee, Operating Lease, Liability, to be Paid, Year Two 2027 Unvested restricted common stock Restricted Stock [Member] Prepaid Expense and Other Assets, Current [Abstract] 2020 Plan Two Thousand Twenty Equity Incentive Plan [Member] Marketable securities in an unrealized loss position for more than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions Weighted average shares used to compute net loss per share, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted, Total Weighted average shares used to compute net loss per share, diluted Weighted Average Number of Shares Outstanding, Diluted Entity File Number Milestone Achievement [Axis] Milestone Achievement Axis Period of increase in common stock reserved for issuance Period Of Increase In Common Stock Reserved For Issuance Period of increase in the number of shares of the Company's common stock reserved for issuance. Proceeds from issuance of common stock under employee stock purchase plan The cash inflow from issuance of common stock under employee stock purchase plan during the period. Proceeds from Issuance of Common Stock Under Employee Stock Purchase Plan Cover Cover [Abstract] Non-cash interest income on marketable securities Investment Income, Nonoperating, Total Investment Income, Nonoperating Exclusive Negotiation Period Maximum Exclusive negotiation period maximum. Exclusive negotiation period maximum Total Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current U.S. Government Treasury Bills US Treasury Securities [Member] Number of shares authorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Number of operating segments Number of Operating Segments Sale of Stock [Domain] General and Administrative Expense, Total General and administrative General and Administrative Expense Issuance Costs for the Shares Issued Under Equity Private Placement Issuance costs for the shares issued under equity private placement. Issuance cost associated with private equity placement Aurigene Agreement Information related to Aurigene Agreement. Two Thousand Twenty Five Warrant Exchange Agreement [Member] Two thousand twenty five warrant exchange agreement. 2025 (Warrant Exchange Agreement) Options expected to vest as at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Incremental interest rate at the event of default Debt Instrument, Interest Rate, Increase (Decrease) Weighted Average Remaining Contractual Life Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Estimated useful lives (in years) Property, Plant and Equipment, Useful Life New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Not Yet Adopted Summary of Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Term of contract Lessee, Operating Lease, Term of Contract Common stock, outstanding (in shares) Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding Operating lease liabilities, current Lease liabilities, current Operating Lease, Liability, Current Lease Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Depreciation, Depletion and Amortization, Total Depreciation and amortization expense Depreciation, Depletion and Amortization Document Transition Report Total operating expenses Operating Expenses Research and Development Expense, Total Research and development Research and Development Expense Prepaid clinical development costs Prepaid Clinical Trial Costs Amount of asset related to consideration paid in advance for clinical trials that provides economic benefits within a future period of one year or the normal operating cycle, if longer. Lessee, Operating Leases [Text Block] Lease ESPP 2020 Plan Available for the 2020 Employee Stock Purchase Plan Represents information pertaining to Available for the 2020 Employee Stock Purchase Plan. Consolidated Statements of Cash Flows Statement of Cash Flows [Abstract] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Assets Assets, Fair Value Disclosure [Abstract] Net Loss Per Common Share Earnings Per Share [Text Block] Net loss Net loss Intrinsic value of outstanding options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Straight-line operating lease expense Operating Lease, Cost Short-term Marketable Securities Short-term marketable securities Represents information relating to short term marketable securities (<12 months to maturity) Expected dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Accrued taxes Accrual for Taxes Other than Income Taxes, Current Operating cash flows from operating leases Operating Lease, Payments Intrinsic Value of vested and exercisable options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Assets Assets [Abstract] Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Document Fiscal Year Focus Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Accounts Payable, Current, Total Accounts payable Accounts Payable, Current Payment For Issuance Costs For Shares Issued Under Two Thousand Twenty Four Equity Private Placement Payment for issuance costs for shares issued under two thousand twenty four equity private placement. Issuance costs for shares issued under 2024 equity private placement Research and development Research and Development Expense [Member] Summary of Restricted Stock Activity and Performance-Based Restricted Stock Unit Awards Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] Lessee, Operating Lease, Liability, to be Paid, Year One 2026 Offering price Sale of Stock, Consideration Received on Transaction Debt Instrument [Axis] Stock-Based Compensation Share-Based Payment Arrangement [Abstract] Total Assets, Fair Value Disclosure Sale of Stock [Axis] Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Net cash used in investing activities Private Placement Private Placement [Member] Title of 12(b) Security Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Money Market Funds Money Market Funds [Member] Debt Securities, Available-for-Sale, Allowance for Credit Loss, Total Allowance for losses on available-for-sale debt securities Debt Securities, Available-for-Sale, Allowance for Credit Loss, Beginning Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance Debt Securities, Available-for-Sale, Allowance for Credit Loss Collaborative Arrangement and Arrangement Other than Collaborative [Table] At-The-Market Offering At The Market Offering [Member] At The Market Offering. Class of Warrant or Right [Line Items] Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2025 (from July 2025) Document Information [Table] Legal Entity [Axis] 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] Outstanding as at beginning of period (in dollars per share) Outstanding at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Fair Value, Recurring and Nonrecurring [Table] 2022 Inducement Plan Information related to 2022 Inducement Plan. Additional Paid-in Capital Additional Paid-in Capital [Member] Measurement Frequency [Domain] Statement of Income Location, Balance [Axis] Trading Symbol Exclusive negotiation period after receipt of written notice Exclusive Negotiation Period After Receipt of Written Notice Exclusive negotiation period after receipt of written notice. Proposed sale negotiation period Proposed Sale Negotiation Period Proposed sale negotiation period. Subsequent Event Type [Axis] Employee-related Liabilities, Current, Total Accrued payroll related costs Employee-related Liabilities, Current Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Expected term (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Fair Value Recurring Fair Value, Recurring [Member] Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Less: Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Significant Accounting Policies [Line Items] Significant accounting policies. Equity Components [Axis] Weighted Average Remaining Contractual Life of vested and exercisable options (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Total other income Nonoperating Income (Expense) Equity Component [Domain] Document Annual Report Prepaid insurance Prepaid Insurance Issuance costs for shares issued under private placement Payment for issuance costs for shares issued under private placement Payment for issuance costs for shares issued under private placement. Issuance of shares under employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Expiration period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] One-time milestone payment to Aurigene One Time Milestone Payment To Aurigene One time milestone payment to aurigene. Cambridge Redevelopment Authority The Cambridge Redevelopment Authority [Member] The Cambridge Redevelopment Authority. Statistical Measurement [Axis] Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Common Stock, Value, Issued Common stock, $0.0001 par value; 490,000,000 shares authorized as of March 31, 2025 and December 31, 2024; 68,333,065 and 74,312,608 shares issued as of March 31, 2025 and December 31, 2024, respectively; 68,333,065 and 74,312,608 shares outstanding as of March 31, 2025 and December 31, 2024, respectively. Aggregate amount of units actually supplied Aggregate Value of Units Actually Supplied Aggregate value of units actually supplied. Issuance of shares under at-the-market offering, net of issuance costs Stock issued under equity at the market offering value. Stock Issued Under Equity At The Market Offering Value Maturity date Line of Credit Facility, Expiration Date Percentage of eligible earnings withheld Percentage of Eligible Earnings Withheld Percentage of eligible earnings withheld to participate in an offering under the ESPP. Clinical development project deposits Clinical Development Project Deposits Noncurrent Clinical development project deposits, noncurrent. Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent, Total Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Net unrealized (loss) gain on marketable securities Cowen and Company, L L C [Member] Cowen and Company, LLC ("TD Cowen"). Cowen and Company Expected volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Stock issued under equity at the market offering shares. Stock Issued Under Equity At The Market Offering Shares Stock issued at the market offering shares Issuance of shares under at-the-market offering Entity Registrant Name Registrant Name Debt Disclosure [Text Block] Long-term Borrowing Gross Unrealized Losses Total unrealized losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Other Nonoperating Income (Expense), Total Other Nonoperating Income (Expense) Other income (loss) Additional Paid in Capital, Total Additional paid-in capital Additional Paid in Capital Tennieh LLC Tennieh L L C [Member] Tennieh LLC. Measurement Frequency [Axis] Proceeds from Issuance of Common Stock Net proceeds from At-The-Market offering Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-Based Compensation Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Entity Common Stock, Shares Outstanding Concentration of Credit Risk and Other Risks and Uncertainties Concentration Risk, Credit Risk, Policy [Policy Text Block] Stock-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Purchase of equipment Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Property, Plant, and Equipment Assets Total assets Income Statement [Abstract] Lease expense Lease, Cost [Abstract] Vested (in shares) Vesting of restricted stock awards (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Denominator: Earnings Per Share, Diluted [Abstract] Net loss per share, diluted (in dollars per share) Earnings Per Share, Diluted, Total Net loss per share, diluted Earnings Per Share, Diluted City Area Code Proceeds from Lines of Credit Proceeds from Lines of Credit, Total Proceeds from borrowings under Credit Facility (Note 11) Aggregate principal amount Aggregate principal amount Line of Credit Facility, Maximum Borrowing Capacity Office lease deposits noncurrent Office lease deposits noncurrent. Office lease deposits Counterparty Name [Domain] Variable lease expense Variable Lease, Cost Issuance of shares under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Weighted-average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Number of patients Number Of Patients Number of patients. Lease Expiration Date Expiration date Total operating lease expense Lease, Cost Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Options vested and exercisable as at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Loss from operations Operating Income (Loss) Pre-Funded Warrants Pre-Funded Warrants [Text Block] Pre-funded warrants. Accumulated Deficit Retained Earnings [Member] Pre-funded Warrants Pre-funded Warrant [policy Text Block] Pre-funded Warrant. Entity Address, Country Cash and Cash Equivalents [Axis] Share-Based Payment Arrangement, Noncash Expense, Total Stock-based compensation expense, including employee stock purchase plan expense Share-Based Payment Arrangement, Noncash Expense Net of issuance costs Payments of Stock Issuance Costs Offering expenses of private placement Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Operating lease liabilities, net of current portion Lease liabilities, non-current Operating Lease, Liability, Noncurrent Level 1 Fair Value, Inputs, Level 1 [Member] Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash provided by (used in) financing activities Short-Term Debt [Line Items] Summary of Total Lease Expense Lease, Cost [Table Text Block] Investments, Fair Value Disclosure, Total Marketable securities Investments, Fair Value Disclosure Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Schedule of Pre-Funded Warrants Issued Nonoperating Income (Expense) [Abstract] Other income: Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net unrealized (loss) gain on marketable securities Schedule of Anti-dilutive Shares Excluded from Calculation of Diluted Net Loss Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Corporate Bonds Corporate Debt Securities [Member] Debt Securities, Available-for-Sale [Table] Entity Interactive Data Current Summary of Supplemental Cash Flow Information Summary of Supplemental Cash Flow Information [Table Text Block] Tabular disclosure of supplemental cash flow information of lessee's operating lease. Statement of Income Location, Balance [Domain] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Exchange Of Common Stock Shares For Pre Funded Warrants Exchange of common stock shares for pre funded warrants. Exchange Of Common Stock Shares Exchange of common stock shares for pre-funded warrants (in shares) Exchange of common stock shares for pre-funded warrants (in shares) Amount currently available for draw down Line of Credit Facility, Current Borrowing Capacity Entity Tax Identification Number Share Price Share price Term of loan agreement Debt Instrument, Term Bio Medical Research Inc Information related to BioMedical Research, Inc. Local Phone Number Total Other Liabilities, Current Other current liabilities (Note 6) Dropbox, Inc [Member] Dropbox, Inc. Dropbox, Inc. Accounting Policies [Abstract] Long-Term Line of Credit, Noncurrent Long-term borrowings drawn from a line of credit Long-term borrowing Cash and Cash Equivalents Cash and Cash Equivalents [Member] Commercial Paper Commercial Paper [Member] Cash, Cash Equivalents, and Short-Term Investments, Total Cash, cash equivalents and marketable securities Cash, Cash Equivalents, and Short-Term Investments Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Shares available from prior equity incentive plan Share Based Compensation Arrangement By Share Based Payment Award Shares Under Prior Plan Number of shares that are available to be issued and other stock awards granted under prior equity incentive plan. Entity Emerging Growth Company Weighted Average Remaining Contractual Life of expected to vest options (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term