Entity Central Index Key
Upfront payments.
Reimbursement revenues.
Cover [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Entity Registrant Name
Entity Registrant Name
Trading Symbol
Trading Symbol
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Current Reporting Status
Entity Current Reporting Status
Entity Filer Category
Entity Filer Category
Entity Shell Company
Entity Shell Company
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Ex Transition Period
Entity Ex Transition Period
Entity Interactive Data Current
Entity Interactive Data Current
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
Entity File Number
Entity File Number
Entity Incorporation, State or Country Code
Entity Incorporation State Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address Address Line1
Entity Address, City or Town
Entity Address City Or Town
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
Entity Address, Country
Entity Address Country
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Document Quarterly Report
Document Quarterly Report
Document Transition Report
Document Transition Report
Title of 12(b) Security
Security12b Title
Security Exchange Name
Security Exchange Name
Statement Of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current assets:
Assets Current [Abstract]
Cash and cash equivalents
Cash And Cash Equivalents At Carrying Value
Marketable securities
Marketable Securities Current
Accounts receivable
Accounts Receivable Net Current
Accounts receivable (related party)
Accounts Receivable Related Parties Current
Prepaid expenses and other current assets
Prepaid Expense And Other Assets Current
Total current assets
Assets Current
Marketable securities
Marketable Securities Noncurrent
Property and equipment, net
Property Plant And Equipment Net
Operating lease right-of-use assets
Operating Lease Right Of Use Asset
Intangible assets, net
Intangible Assets Net Including Goodwill
Deferred tax assets
Deferred Tax Assets Liabilities Net Noncurrent
Other assets
Other Assets Noncurrent
Total assets
Assets
LIABILITIES AND STOCKHOLDERS’ EQUITY
Liabilities And Stockholders Equity [Abstract]
Current liabilities:
Liabilities Current [Abstract]
Accounts payable
Accounts Payable Current
Accrued expenses
Accrued Liabilities Current
Current portion of lease obligation
Operating Lease Liability Current
Current portion of deferred revenue
Deferred Revenue Current
Current portion of deferred revenue (related party)
Due To Related Parties Current
Total current liabilities
Liabilities Current
Lease obligation
Operating Lease Liability Noncurrent
Deferred revenue, net of current portion
Deferred Revenue Noncurrent
Deferred revenue, net of current portion (related party)
Due To Related Parties Noncurrent
Total liabilities
Liabilities
Stockholders’ equity:
Stockholders Equity [Abstract]
Common shares
Common Stock Value
Additional paid-in capital
Additional Paid In Capital Common Stock
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income Loss Net Of Tax
Accumulated deficit
Retained Earnings Accumulated Deficit
Total stockholders’ equity
Stockholders Equity
Total liabilities and stockholders’ equity
Liabilities And Stockholders Equity
Common shares, par value
Common Stock Par Or Stated Value Per Share
Common shares, authorized
Common Stock Shares Authorized
Common shares, issued
Common Stock Shares Issued
Common shares, outstanding
Common Stock Shares Outstanding
Income Statement [Abstract]
Statement [Table]
Statement [Table]
Product and Service
Product Or Service [Axis]
Product and Service
Products And Services [Domain]
Collaboration revenue.
Collaboration Revenue [Member]
Collaboration Revenue [Member]
Collaboration revenue (related party).
Collaboration Revenue (Related Party) [Member]
Collaboration Revenue Related Party [Member]
Statement [Line Items]
Statement [Line Items]
Total revenue from contracts with customers
Revenue From Contract With Customer Excluding Assessed Tax
Total revenue
Revenues
Operating expenses:
Operating Expenses [Abstract]
Research and development
Research And Development Expense
General and administrative
General And Administrative Expense
Total operating expenses
Operating Expenses
Operating loss
Operating Income Loss
Other income, net:
Nonoperating Income Expense [Abstract]
Interest income, net
Investment Income Interest
Foreign exchange gains
Foreign Currency Transaction Gain Loss Before Tax
Other income, net
Other Nonoperating Income
Net loss before income taxes
Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest
Tax expense
Income Tax Expense Benefit
Net loss
Net Income Loss
Other comprehensive loss:
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Currency translation adjustment
Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
Comprehensive loss
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
Net loss per share attributable to common stockholders: Basic and diluted
Earnings Per Share Basic And Diluted
Weighted-average common shares outstanding: Basic and diluted
Weighted Average Number Of Share Outstanding Basic And Diluted
Foreign exchange gain.
Payment of offering costs.
Restricted cash and non-current other assets.
Statement Of Cash Flows [Abstract]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Cash Provided By Used In Operating Activities [Abstract]
Net loss
Profit Loss
Adjustments to reconcile net loss to net cash used in operating activities:
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Depreciation and amortization of property and equipment
Depreciation Depletion And Amortization
Amortization of intangible assets
Amortization Of Intangible Assets
Foreign exchange gain
Foreign Exchange Gain
Loss on disposal of property and equipment
Gain Loss On Sale Of Property Plant Equipment
Stock-based compensation expense
Share Based Compensation
Amortization of discount on investments
Debt And Equity Securities Unrealized Gain Loss
Deferred tax expense
Deferred Income Tax Expense Benefit
Changes in operating assets and liabilities:
Increase Decrease In Operating Capital [Abstract]
Accounts receivable
Increase Decrease In Accounts Receivable
Operating lease right-of-use assets and lease obligations
Increase Decrease In Other Noncurrent Assets And Liabilities Net
Prepaid expenses and other current assets
Increase Decrease In Prepaid Deferred Expense And Other Assets
Accounts payable
Increase Decrease In Accounts Payable
Accrued expenses
Increase Decrease In Accrued Liabilities
Deferred revenue
Increase Decrease In Contract With Customer Liability
Net cash used in operating activities
Net Cash Provided By Used In Operating Activities
CASH FLOWS FROM INVESTING ACTIVITIES:
Net Cash Provided By Used In Investing Activities [Abstract]
Purchases of marketable securities
Payments To Acquire Marketable Securities
Proceeds from maturities of marketable securities
Proceeds From Sale And Maturity Of Marketable Securities
Purchases of intangible assets
Payments To Acquire Intangible Assets
Purchases of property and equipment
Payments To Acquire Property Plant And Equipment
Net cash (used in) provided by investing activities
Net Cash Provided By Used In Investing Activities
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Cash Provided By Used In Financing Activities [Abstract]
Payment of offering costs
Payment Of Offering Costs
Proceeds from stock options exercised
Proceeds From Stock Options Exercised
Net cash provided by financing activities
Net Cash Provided By Used In Financing Activities
Foreign exchange impact on cash, cash equivalents and restricted cash
Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Net decrease in cash, cash equivalents and restricted cash
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash, cash equivalents, and restricted cash, beginning of period
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Cash, cash equivalents, and restricted cash, end of period
SUPPLEMENTAL DISCLOSURES:
Supplemental Cash Flow Information [Abstract]
Non-cash purchases of property, equipment and intangibles
Capital Expenditures Incurred But Not Yet Paid
CASH, CASH EQUIVALENTS AND RESTRICTED CASH
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect [Abstract]
Restricted cash included in non-current other assets
Restricted Cash And Non Current Other Assets
Stock issued during period shares stock options exercised and stock options exercised and restricted stock units vested.
Stock issued during period value stock options exercised and restricted stock units vested.
Statement Of Stockholders Equity [Abstract]
Equity Components
Statement Equity Components [Axis]
Equity Component
Equity Component [Domain]
Common Stock [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Additional Paid In Capital [Member]
Accumulated Deficit [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income [Member]
Beginning balance
Beginning balance, shares
Shares Outstanding
Exercise of stock options and vesting of restricted stock units
Stock Issued During Period Value Stock Options Exercised And Restricted Stock Units Vested
Exercise of stock options and vesting of restricted stock units, shares
Stock Issued During Period Shares Stock Options Exercised And Stock Options Exercised And Restricted Stock Units Vested
Stock-based compensation
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
Net loss
Ending balance
Ending balance, shares
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Overview
Nature Of Operations
Accounting Policies [Abstract]
Summary of Significant Accounting Policies
Significant Accounting Policies [Text Block]
Debt Securities [Abstract]
Investments in Debt Securities
Investments In Debt And Marketable Equity Securities And Certain Trading Assets Disclosure [Text Block]
Balance Sheet Related Disclosures [Abstract]
Supplemental Balance Sheet Information
Supplemental Balance Sheet Disclosures [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments And Contingencies Disclosure [Text Block]
Leases [Abstract]
Leases
Lessee Operating Leases [Text Block]
Collaborations
Collaborative Arrangement Disclosure [Text Block]
Compensation And Retirement Disclosure [Abstract]
Employee Benefits
Compensation And Employee Benefit Plans [Text Block]
Related Party Transactions [Abstract]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Subsequent Events [Abstract]
Subsequent Events
Subsequent Events [Text Block]
Basis of Preparation
Basis Of Accounting Policy Policy [Text Block]
Disclosure of accounting policy for going concern.
Going Concern
Going Concern Policy [Text Block]
Pending accounting pronouncements.
Pending Accounting Pronouncements
Pending Accounting Pronouncements Policy [Text Block]
Investments in debt securities held to maturity balance sheet presentation.
Summary of Investments in Debt Securities in Condensed Consolidated Balance Sheet
Investments In Debt Securities Held To Maturity Balance Sheet Presentation Table [Text Block]
Schedule of Prepaid Expenses and Other Current Assets
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Text Block]
Summary of Accrued Expenses
Schedule Of Accrued Liabilities Table [Text Block]
Summary of Components of Expense for (Benefit) from Income Taxes
Schedule Of Components Of Income Tax Expense Benefit Table [Text Block]
Summary of Components of Lease Cost
Lease Cost Table [Text Block]
Summary of Company's Accompanying Condensed Consolidated Financial Statements Attributable to Transactions Arising From Collaboration Arrangements
Schedule Of Condensed Financial Statements Table [Text Block]
Summary of Company's Collaboration Arrangements Earned in Period to Be Billed and Collected in Next Period
Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions Table [Text Block]
Summary of Share-based Compensation Expense Classified in Condensed Consolidated Statements of Operations and Comprehensive Loss
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block]
Accumulated deficit
Cash and cash equivalents and marketable securities
Cash Cash Equivalents And Short Term Investments
Available For Sale Securities [Abstract]
Debt Securities Held To Maturity Nonaccrual [Table]
Debt Securities Held To Maturity Nonaccrual [Table]
Investment Type
Investment Type [Axis]
Investments
Investment Type Categorization [Member]
Money market funds [member]
Money Market Funds [Member]
Corporate paper notes and bonds.
Corporate paper and notes [member]
Corporate Paper Notes And Bonds [Member]
U.S. government agency securities [member]
U S Government Corporations And Agencies Securities [Member]
U.S. treasuries [member]
U S Treasury Securities [Member]
Financial Instrument
Financial Instrument [Axis]
Financial Instruments
Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain]
Cash equivalents [member]
Cash Equivalents [Member]
Marketable securities current.
Current marketable securities [member]
Marketable Securities Current [Member]
Marketable securities non current.
Non-current marketable securities [member]
Marketable Securities Non Current [Member]
Debt Securities Held To Maturity Nonaccrual [Line Items]
Debt Securities Held To Maturity Nonaccrual [Line Items]
Total
Held To Maturity Securities
Fair value of debt securities
Held To Maturity Securities Fair Value
Prepaid clinical and manufacturing costs current.
Prepaid general and administrative expenses.
Prepaid Expense And Other Assets Current [Abstract]
Prepaid clinical and manufacturing costs
Prepaid Clinical And Manufacturing Costs Current
Prepaid general and administrative expenses
Prepaid General And Administrative Expenses
Interest receivable
Interest Receivable Current
Other
Other Assets Current
Total
Accrued research and development expenses current.
Accrued general and administrative expenses.
Payables And Accruals [Abstract]
Accrued research and development expenses
Accrued Research And Development Expenses Current
Accrued general and administrative expenses
Accrued General And Administrative Expenses
Accrued personnel costs
Employee Related Liabilities Current
Other
Other Accrued Liabilities Current
Total
U.S. federal
Current Federal Tax Expense Benefit
U.S. state
Current State And Local Tax Expense Benefit
Total current tax (benefit) expense
Current Income Tax Expense Benefit
U.S. federal
Deferred Federal Income Tax Expense Benefit
U.S. state
Deferred State And Local Income Tax Expense Benefit
Total deferred tax expense
Total tax expense
Other information.
Lease cost
Lease Cost [Abstract]
Operating lease cost
Operating Lease Cost
Variable lease cost
Variable Lease Cost
Total lease cost included in operating expenses
Lease Cost
Other information
Other Information [Abstract]
Cash paid for amounts included in the measurement of lease liabilities included in operating cash flows
Operating Lease Payments
Deferred revenue from collaborative arrangement.
Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]
Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]
Related Party Transaction
Related Party Transaction [Axis]
Related Party Transaction
Related Party Transaction [Domain]
Incyte collaboration and license agreement.
Incyte Collaboration and License Agreement
Incyte Collaboration And License Agreement [Member]
License and related activities.
License and Related Activities
License And Related Activities [Member]
Second ONO research and license agreement.
Second ONO Research and License Agreement
Second O N O Research And License Agreement [Member]
Simcere collaboration and license agreement.
Simcere Collaboration and License Agreement
Simcere Collaboration And License Agreement [Member]
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Research and Development
Research And Development Arrangement [Member]
License and performance.
License and Performance
License And Performance [Member]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Collaborations, transaction price as deferred revenue
Deferred Revenue From Collaborative Arrangement
Non refundable upfront payments receivable.
Payment to compensate research services.
Over time payment for full time equivalent funding.
Non-refundable upfront payment receivable
Non Refundable Upfront Payments Receivable
Payment to compensate research services
Payment To Compensate Research Services
Over time payment for full time equivalent funding
Over Time Payment For Full Time Equivalent Funding
Development milestones received.
Development milestones received
Development Milestones Received
Number of bispecific antibodies.
Non-refundable upfront payments received.
Number of bispecific antibodies under collaboration and license agreement
Number Of Bispecific Antibodies
Non-refundable upfront payment received
Non Refundable Upfront Payments Received
Number of performance obligation.
Number of performance obligation
Number Of Performance Obligation
Amount of revenue from collaborative arrangement.
Collaborations, transaction price as revenue
Revenue From Collaborative Arrangement
Number of milestones achieved.
Milestone payments received.
Milestone payments received
Milestone Payments Received
Number of milestones achieved
Number Of Milestones Achieved
Description of research and development programs.
Description of transaction price under fixed consideration
Description Of Research And Development Programs
Billings.
Foreign currency exchange translation.
Unbilled receivable from collaboration contracts.
Concentration Risk Benchmark
Concentration Risk By Benchmark [Axis]
Concentration Risk Benchmark
Concentration Risk Benchmark [Domain]
Accounts Receivable
Accounts Receivable [Member]
Unbilled receivables.
Unbilled Receivables
Unbilled Receivables [Member]
Deferred revenue.
Deferred Revenue
Deferred Revenue [Member]
Related Party
Related Party Transactions By Related Party [Axis]
Related Party
Related Party [Domain]
Incyte.
Incyte
Incyte [Member]
Ono.
Ono
Ono [Member]
Other.
Other
Other [Member]
Collaboration Agreement.
Collaboration Agreement
Collaboration Agreement [Member]
Balance at January 1, 2019
Contract With Customer Asset Net
Accrued receivables
Unbilled Receivable From Collaboration Contracts
Billings
Billings
Cash receipts
Proceeds From Customers
Foreign exchange
Foreign Currency Exchange Translation
Balance at March 31, 2020
Balance at January 1, 2019
Contract With Customer Liability
Revenue recognized in the period
Contract With Customer Liability Revenue Recognized
Balance at March 31, 2020
Less: current portion
Contract With Customer Liability Current
Non-current balance at March 31, 2020
Contract With Customer Liability Noncurrent
Upfront payments
Upfront Payments
Reimbursement revenue
Reimbursement Revenues
Milestones
Contract With Customer Liability Change In Timeframe Performance Obligation Satisfied Revenue Recognized
Total collaboration revenue
Revenue From Collaborative Arrangement Excluding Revenue From Contract With Customer
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Research and Development
Research And Development Expense [Member]
General and Administrative
General And Administrative Expense [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total
Allocated Share Based Compensation Expense
Sharebased compensation arrangement by sharebased payment award fair value assumptions weighted average contractual term.
Retirement Plan Type
Retirement Plan Type [Axis]
Retirement Plan Type
Retirement Plan Type [Domain]
Postemployment Retirement Benefits
Postemployment Retirement Benefits [Member]
Award Type
Award Type [Axis]
Award Type
Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]
RSUs
Restricted Stock Units R S U [Member]
Weighted-average fair value of options granted
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
Share-based payment award, fair value assumptions, method used
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Method Used
Number of options granted
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
Risk-free interest rate
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate
Expected volatility
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
Weighted average expected term
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
Weighted-average contractual term
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Weighted Average Contractual Term
Grant of restricted stock unit.
Executive settlement, cash compensation to be paid
Postemployment Benefits Liability Current
Executive settlement, cash compensation paid
Payments For Postemployment Benefits
Grant of RSUs
Grant Of Restricted Stock Unit
Executive settlement expense
Postemployment Benefits Period Expense
Schedule Of Related Party Transactions By Related Party [Table]
Schedule Of Related Party Transactions By Related Party [Table]
Ownership
Ownership [Axis]
Ownership
Ownership [Domain]
Merus NV.
Merus N V [Member]
Merus N V [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Ownership percentage
Minority Interest Ownership Percentage By Noncontrolling Owners
Subsequent Event [Table]
Subsequent Event [Table]
Subsequent Event Type
Subsequent Event Type [Axis]
Subsequent Event Type
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Subsequent Event [Line Items]
Subsequent Event [Line Items]