Entity Central Index Key Document And Entity Information [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 Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Irrevocable transfer of an asset from a related party which is expected to settle within one year. Advance payments under license agreement. Collaboration agreement contingent liability noncurrent. Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Restricted cash Restricted Cash And Cash Equivalents At Carrying Value Receivables from collaboration and license agreement Accounts Receivable Net Current Notes receivable Notes And Loans Receivable Net Current Prepaid assets Prepaid Expense Current Other assets Other Assets Current Other assets - related party Other Assets Current Related Parties Total current assets Assets Current Property and equipment, net Property Plant And Equipment Net Intangible assets Intangible Assets Net Excluding Goodwill Goodwill Goodwill Other assets, non-current 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 Accounts payable - related parties Accounts Payable Related Parties Current Accrued liabilities Accrued Liabilities Current Advance payments under license agreement Advance Payments Under License Agreement Deferred revenue Deferred Revenue Current Contingent consideration Business Combination Contingent Consideration Liability Current Other liabilities Other Liabilities Current Total current liabilities Liabilities Current Deferred revenue, non-current Deferred Revenue Noncurrent Contingent liability to collaborator Collaboration Agreement Contingent Liability Noncurrent Contingent consideration, non-current Business Combination Contingent Consideration Liability Noncurrent Other liabilities, non-current Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments And Contingencies Stockholders’ equity: Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract] Preferred stock, $0.0001 par value; Shares authorized: 5,000,000 at June 30, 2015; Shares issued and outstanding: no shares at June 30, 2015 and December 31, 2014 Preferred Stock Value Common stock, $0.0001 par value; Shares authorized: 300,000,000 at June 30, 2015; Shares issued and outstanding: 38,219,006 and 33,257,978 at June 30, 2015 and December 31, 2014, respectively Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit Total Coherus stockholders' equity Stockholders Equity Non-controlling interest Minority Interest Total stockholders' equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest Total liabilities and stockholders' equity Liabilities And Stockholders Equity Preferred stock, par value Preferred Stock Par Or Stated Value Per Share Preferred stock, shares authorized Preferred Stock Shares Authorized Preferred stock, shares issued Preferred Stock Shares Issued Preferred stock, shares outstanding Preferred Stock Shares Outstanding Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Statement [Table] Statement [Table] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] Daiichi Sankyo. Daiichi Sankyo - Related Party Daiichi Sankyo [Member] Type of Arrangement and Non-arrangement Transactions Type Of Arrangement [Axis] Arrangements and Non-arrangement Transactions Arrangements And Nonarrangement Transactions [Member] Baxter license agreement. Baxter License Agreement Baxter License Agreement [Member] Statement [Line Items] Statement [Line Items] Revenue: Revenues [Abstract] Collaboration and license revenue License And Services Revenue Operating expenses: Operating Expenses [Abstract] Research and development (includes related party of $12,404 and $6,696 for the three months ended June 30, 2015 and 2014, respectively; and $23,885 and $10,961 for the six months ended June 30, 2015 and 2014, respectively) Research And Development Expense General and administrative (includes related party of $277 and $0 for the three months ended June 30, 2015 and 2014, respectively; and $343 and $0 for the six months ended June 30, 2015 and 2014, respectively) General And Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income Loss Interest expense (includes related party of $0 and $798 for the three months ended June 30, 2015 and 2014, respectively; and $0 and $2,687 for the six months ended June 30, 2015 and 2014, respectively) Interest Expense Other expense, net Other Nonoperating Income Expense Net loss Profit Loss Net loss attributable to non-controlling interest Net Income Loss Attributable To Noncontrolling Interest Net loss attributable to Coherus Net Income Loss Net loss per share attributable to Coherus, basic and diluted Earnings Per Share Basic And Diluted Weighted-average number of shares used in computing net loss per share attributable to Coherus, basic and diluted Weighted Average Number Of Share Outstanding Basic And Diluted Related party transaction research and development expense. Percentage of equity method interest held by related party, minimum. Research and development from transactions with related party Related Party Transaction Research And Development Expense General and administrative expenses from transactions with related party Related Party Transaction Selling General And Administrative Expenses From Transactions With Related Party Interest expense from transactions with related party Interest Expense Related Party Percentage of equity interest held by related party, minimum Percentage Of Equity Interest Held By Related Party Minimum Statement Of Income And Comprehensive Income [Abstract] Net loss Other comprehensive loss: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Foreign currency translation adjustments, net of tax 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 Comprehensive loss attributable to non-controlling interest Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest Comprehensive loss attributable to Coherus Comprehensive Income Net Of Tax Increase (decrease) in advance payments under license agreement. The increase (decrease) during the reporting period in the aggregate amount of contingent liability under the collaborative arrangement. Proceeds from issuance follow on offering net of underwriters discounts and commissions. Statement Of Cash Flows [Abstract] Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] Initial Public Offering I P O [Member] Follow on public offering. Follow-On Public Offering Follow On Public Offering [Member] Operating activities Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Adjustments to reconcile net loss to net cash (used in) provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation Depletion And Amortization Remeasurement of contingent consideration Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 Remeasurement of convertible preferred stock warrants Fair Value Adjustment Of Warrants Preferred stock issued in exchange for services Issuance Of Stock And Warrants For Services Or Claims Non-cash interest (income) expense and amortization of (receivable) debt discount Other Noncash Income Expense Gain on extinguishment of 2013 Notes Gains Losses On Extinguishment Of Debt Stock-based compensation expense Share Based Compensation Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Receivables from collaboration and license agreement Increase Decrease In Accounts Receivable Receivables from related party Increase Decrease In Accounts Receivable Related Parties Notes receivable from related parties Increase Decrease In Notes Receivable Related Parties Current Notes receivable Increase Decrease In Notes Receivable Current Prepaid assets Increase Decrease In Prepaid Expense Other assets Increase Decrease In Other Operating Assets Other assets - non-current Increase Decrease In Other Noncurrent Assets Accounts payable Increase Decrease In Accounts Payable Accounts payable - related parties Increase Decrease In Accounts Payable Related Parties Accrued and other liabilities Increase Decrease In Accrued Liabilities And Other Operating Liabilities Deferred revenue Increase Decrease In Deferred Revenue Advance payments under license agreements Increase Decrease In Advance Payments Under License Agreement Contingent liability to collaborator Increase Decrease In Contingent Liability To Collaborator Other liabilities, non-current Increase Decrease In Other Noncurrent Liabilities Net cash (used in) provided by operating activities Net Cash Provided By Used In Operating Activities Continuing Operations Investing activities Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Net cash acquired from acquisition of InteKrin Therapeutics, Inc. Cash Acquired From Acquisition 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 Continuing Operations Financing activities Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Proceeds from issuance of convertible preferred stock, net of issuance costs Proceeds From Issuance Of Convertible Preferred Stock Proceeds from issuance of convertible preferred stock upon exercise of warrants Proceeds From Warrant Exercises Proceeds from follow-on offering, net of underwriters discounts and commissions Proceeds From Issuance Follow On Offering Net Of Underwriters Discounts And Commissions Proceeds from issuance of common stock upon exercise of stock options Proceeds From Stock Options Exercised Repurchase of restricted common stock Payments For Repurchase Of Common Stock Payments of offering costs Payments Of Stock Issuance Costs Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Continuing Operations Effect of exchange rate changes in cash and cash equivalents Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations Net increase in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Organization Consolidation And Presentation Of Financial Statements [Abstract] Organization and Operations Nature Of Operations Accounting Policies [Abstract] Basis of Presentation and Summary of Significant Accounting Policies Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Collaboration And License Agreements [Abstract] Collaborative and License Agreements Collaborative Arrangement Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Common Stock and Stock-Based Compensation Shareholders Equity And Share Based Payments [Text Block] Earnings Per Share [Abstract] Net Loss Per Share Attributable to Coherus Earnings Per Share [Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Subsequent Events [Abstract] Subsequent Event Subsequent Events [Text Block] Unaudited Condensed Consolidated Financial Statements Consolidation Policy [Text Block] Use of Estimates Use Of Estimates Foreign Currency Foreign Currency Transactions And Translations Policy [Text Block] Segment Reporting Segment Reporting Policy Policy [Text Block] Derivative Liability Derivatives Policy [Text Block] Customer Concentration Concentration Risk Credit Risk Revenue Recognition Revenue Recognition Policy [Text Block] Comprehensive Loss Comprehensive Income Policy Policy [Text Block] Net Loss per Share Attributable to Coherus Earnings Per Share Policy [Text Block] Recent Accounting Pronouncements New Accounting Pronouncements Policy Policy [Text Block] Summary of Revenue by Geographical Region Revenue From External Customers By Geographic Areas Table [Text Block] Summary of Customers Revenue Accounted for 10% or More of Total Revenue Schedule Of Revenue By Major Customers By Reporting Segments Table [Text Block] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Liability Class Fair Value By Liability Class [Axis] Fair Value by Liability Class Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Contingent consideration. Contingent Consideration Contingent Consideration [Member] Measurement Frequency Fair Value By Measurement Frequency [Axis] Fair Value, Measurement Frequency Fair Value Measurement Frequency [Domain] Fair Value Measurements Recurring Basis Fair Value Measurements Recurring [Member] 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] Financial Assets and Liabilities Measured on a Recurring Basis Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block] Schedule of Prepaid Assets Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Text Block] Schedule of Property and Equipment, Net Property Plant And Equipment [Text Block] Schedule of Accrued Liabilities Schedule Of Accrued Liabilities Table [Text Block] Schedule of Revenue Related to Collaboration and License Agreements Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions Table [Text Block] Schedule​ of employee and nonemployee​ service​ share​ based​ compensation​ allocation​ of recognized​ period ​costs. Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Award Type Award Type [Axis] Equity Award Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Restricted Common Stock (Founders Shares) Restricted Stock [Member] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Schedule of Stock-Based Compensation Expense Schedule Of Employee And Nonemployee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Schedule of Stock-Based Compensation Expense Related to Option Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Text Block] Computation of Basic and Diluted Net Loss Per Share Attributable to Coherus Schedule Of Earnings Per Share Basic And Diluted Table [Text Block] Outstanding Dilutive Potential Shares Excluded from Calculation of Diluted Net Loss Per Share Attributable to Coherus Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Text Block] Schedule of Approximate Future Minimum Lease Payments for all the Company's Facility Leases Schedule Of Future Minimum Lease Payments For Capital Leases Table [Text Block] Organization and operations. Organization And Operations [Table] Organization And Operations [Table] Baxalta license agreement. Baxalta License Agreement Baxalta License Agreement [Member] Organization And Operations [Line Items] Organization And Operations [Line Items] Number of operating segments Number Of Operating Segments Milestone payment received. Organization and operations. Milestone payment received Milestone Payment Received Share price Sale Of Stock Price Per Share Gross proceeds from issuance of common stock Proceeds From Issuance Of Common Stock Underwriting discounts and commissions Payments For Underwriting Expense Offering expense Proceeds from issuance of common stock, net of offering expense Sale Of Stock Consideration Received On Transaction Accumulated deficit Basis of presentation and summary of significant accounting policies. Basis of presentation and summary of significant accounting policies. Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] RUSSIA RUSSIAN FEDERATION Business Acquisition Business Acquisition [Axis] Business Acquisition, Acquiree Business Acquisition Acquiree [Domain] InteKrin Therapeutics, Inc. InteKrin Therapeutics Inc Inte Krin Therapeutics Inc [Member] Legal Entity Legal Entity [Axis] Entity Entity [Domain] Coherus Intermediate Corp, InteKrin Therapeutics, Inc. Majority Owned Subsidiary Unconsolidated [Member] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Controlling interest, ownership percentage by parent Minority Interest Ownership Percentage By Parent Foreign exchange gain (loss) Foreign Currency Transaction Gain Loss Before Tax Number of reportable segment Number Of Reportable Segments Schedule Of Revenues From External Customers And Long Lived Assets [Table] Schedule Of Revenues From External Customers And Long Lived Assets [Table] United States UNITED STATES Foreign countries. Rest of World Foreign Countries [Member] Revenues From External Customers And Long Lived Assets [Line Items] Revenues From External Customers And Long Lived Assets [Line Items] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Collaboration and License Revenue Sales Revenue Net [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Customer Major Customers [Axis] Customer Name Of Major Customer [Domain] Baxalta corporation. Baxalta Baxalta Corporation [Member] Percentage of total revenues by single customer Concentration Risk Percentage1 Asset Class Fair Value By Asset Class [Axis] Asset Class Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain] Money Market Funds Money Market Funds [Member] Fair Value, Hierarchy Fair Value By Fair Value Hierarchy Level [Axis] Fair Value Hierarchy Fair Value Measurements Fair Value Hierarchy [Domain] Level 1 Fair Value Inputs Level1 [Member] Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Other Nonoperating Income (Expense) Other Nonoperating Income Expense [Member] Level 3 Fair Value Inputs Level3 [Member] Unrealized gains and losses on investments Unrealized Gain Loss On Investments Restricted Cash (Money Market Funds) Restricted Cash Money Market Funds [Member] Level 2 Fair Value Inputs Level2 [Member] Total financial assets Assets Fair Value Disclosure Total financial liabilities Financial Liabilities Fair Value Disclosure Transfers of asset from Level 1 to Level 2 Fair Value Assets Level1 To Level2 Transfers Amount Transfers of liabilities from Level 1 to Level 2 Fair Value Liabilities Level1 To Level2 Transfers Amount Shares issued to settle the earn out portion of the contingent consideration liability. Additional contingent consideration classified as equity fair value disclosure. Business acquisition, number of shares issued Shares Issued To Settle Earn Out Portion Of Contingent Consideration Liability Business acquisition, shares price Business Acquisition Share Price Business acquisition, cash payment Payments To Acquire Businesses Gross Fair value of common stock issued Equity Issued In Business Combination Fair Value Disclosure Additional fair value of earn-out payment to other expense Additional Contingent Consideration Classified As Equity Fair Value Disclosure Other expense, net Discount rate Fair Value Inputs Discount Rate Counterparty credit risk given the cash payment Fair Value Inputs Counterparty Credit Risk Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] Beginning balance Change in fair value of the contingent consideration liability Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings Fair value of Earn-Out Payment settled in common stock on March 6, 2015 Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements Ending balance Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract] Schedule Of Prepaid Assets [Table] Schedule Of Prepaid Assets [Table] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Clinical material manufacturing and other related parties. Prepaid Clinical, Material, Manufacturing and Other - Related Parties Clinical Material Manufacturing And Other Related Parties [Member] Clinical material and manufacturing. Prepaid Clinical, Material and Manufacturing Clinical Material And Manufacturing [Member] Prepaid Other Prepaid Expenses And Other Current Assets [Member] Schedule Of Prepaid Assets [Line Items] Schedule Of Prepaid Assets [Line Items] Property Plant And Equipment [Abstract] Schedule Of Property Plant And Equipment [Table] Schedule Of Property Plant And Equipment [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Machinery and Equipment Machinery And Equipment [Member] Computer Equipment and Software Computer Equipment [Member] Furniture and Fixtures Furniture And Fixtures [Member] Leasehold Improvements Leasehold Improvements [Member] Construction in Progress Construction In Progress [Member] Property Plant And Equipment [Line Items] Property Plant And Equipment [Line Items] Total property and equipment Property Plant And Equipment Gross Accumulated depreciation and amortization Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Property and equipment, net Accrued clinical and manufacturing liabilities current. Payables And Accruals [Abstract] Accrued clinical, manufacturing and other - related parties Accrued Utilities Current Accrued clinical and manufacturing Accrued Clinical And Manufacturing Liabilities Current Accrued compensation Employee Related Liabilities Current Accrued professional and consulting fees Accrued Professional Fees Current Accrued other Other Accrued Liabilities Current Accrued liabilities Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] Range Range [Axis] Range Range [Member] Maximum Maximum [Member] Contingent Consideration by Type Contingent Consideration By Type [Axis] Contingent Consideration Type Contingent Consideration Type [Domain] Clinical development payments. Clinical Development Payments Clinical Development Payments [Member] Regulatory milestone payments. Regulatory Milestone Payments Regulatory Milestone Payments [Member] Research and Development Arrangement, Contract to Perform for Others, Type Research And Development Arrangement Contract To Perform For Others By Type [Axis] Research and Development Arrangement, Contract to Perform for Others, Type Research And Development Arrangement Contract To Perform For Others Type [Domain] 2015 Second Amended Member License Agreement Terms [Member] Deferred revenue Deferred Revenue Collaborative arrangement minimum percentage committed for clinical trial cost. Minimum percentage of clinical trial cost Collaborative Arrangement Minimum Percentage Committed For Clinical Trial Cost Deferred revenue, current Research and development expenses reimbursed. Research and development Research And Development Expenses Reimbursed Contingent milestone payment receivable. Increase in license agreement contingent milestone receivable. Contingent payment receivable Contingent Milestone Payment Receivable Increase in license agreement non-substantive contingent milestone receivable Increase In License Agreement Contingent Milestone Receivable Contingent milestone payment development related expenses. Contingent​ milestone ​payment​ refund percentage. Contingent payment development related expenses Contingent Milestone Payment Development Related Expenses Contingent payments refundable, percentage Contingent Milestone Payment Refund Percentage Expiration of license agreement month and year. Expiration of license agreement Expiration Of License Agreement Month And Year Potential milestone repayments. Milestone repayment subject to claw-back feature Potential Milestone Repayments Value of shares of common stock to be purchased. Period of common stock to be purchased. Value of shares of common stock to purchase under agreement Value Of Shares Of Common Stock To Be Purchased Amendment execution period Period Of Common Stock To Be Purchased Purchase commitments period of contract termination. Purchase Commitment Excluding Longterm Commitment [Table] Purchase Commitment Excluding Longterm Commitment [Table] Medpace Inc. Medpace Inc Medpace Inc [Member] Purchase Commitment, Excluding Long-term Commitment Purchase Commitment Excluding Longterm Commitment [Axis] Purchase Commitment, Excluding Long-term Commitment Purchase Commitment Excluding Longterm Commitment [Domain] Contract manufacturing organizations. CMOs Contract Manufacturing Organizations [Member] Purchase Commitment Excluding Longterm Commitment [Line Items] Purchase Commitment Excluding Longterm Commitment [Line Items] Contractual commitment Purchase Obligation Due In Next Twelve Months Minimum fee commitment Purchase Commitment Remaining Minimum Amount Committed Purchase commitment amount of services performed Purchase Commitment Amount Of Services Performed Period of contract termination Purchase Commitment Period Of Contract Termination Payment of claims Litigation Settlement Amount Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Warrant Warrant [Member] Research and Development Expense Research And Development Expense [Member] General and Administrative Expense General And Administrative Expense [Member] Offering expenses. Offering Expenses Offering Expenses Vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Common stock shares subject to repurchase Stock Repurchase Program Number Of Shares Authorized To Be Repurchased Stock-based compensation expense Allocated Share Based Compensation Expense Stock issued for warrant exercised Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights Common stock, exercise price Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 Numerator: Net Income Loss [Abstract] Net loss attributable to Coherus Denominator: Weighted Average Number Of Shares Outstanding [Abstract] Weighted-average common shares outstanding Weighted Average Number Of Shares Outstanding Basic Less: weighted-average unvested common shares subject to repurchase Weighted Average Number Of Shares Common Stock Subject To Repurchase Or Cancellation Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Antidilutive Securities Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities, Name Antidilutive Securities Name [Domain] Stock Options Outstanding Stock Option [Member] Convertible Preferred Stock Convertible Preferred Stock [Member] Convertible preferred stock. Convertible Preferred Stock Warrants Convertible Preferred Stock Warrants [Member] Common Stock Warrants Common Stock Warrants [Member] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive securities excluded from the calculation of diluted net loss per share Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Minimum Minimum [Member] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Series B Convertible Preferred Stock Series B Preferred Stock [Member] Cook. Cook Cook [Member] Auction Market Preferred Securities, Stock Series Auction Market Preferred Securities Stock Series [Axis] Auction Market Preferred Securities, Stock Series, Title Auction Market Preferred Securities Stock Series Title [Domain] Series B Series B [Member] Accrued clinical and manufacturing other - related parties. Accrued Clinical, Manufacturing and Other - Related Parties Accrued Clinical And Manufacturing Other Related Parties [Member] Recruiting services provider. Recruiting Services Recruiting Services Provider [Member] Short-term Debt, Type Short Term Debt Type [Axis] Short-term Debt, Type Short Term Debt Type [Domain] Bridge Loan Bridge Loan [Member] Investor Investor [Member] Inte Krin Russia. InteKrin Russia Inte Krin Russia [Member] Chief Executive Officer Chief Executive Officer [Member] Officer Officer [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Convertible preferred stock, shares issued Temporary Equity Shares Issued Related party transaction ownership percentage Minority Interest Ownership Percentage By Noncontrolling Owners Reduction of research and development expense Research and development expense Purchase commitment amount of services performed. Accrued and other liabilities Accrued Liabilities And Other Liabilities Aggregate principle amount Debt Instrument Face Amount Warrant exercise price Total aggregate amount from related parties Due To Related Parties Noncurrent Business Combination Consideration Transferred1 Business Combination Consideration Transferred1 Area of office space leased. Lease initiation date. Subsequent Event [Table] Subsequent Event [Table] Lease Arrangement, Type Lease Arrangement Type [Axis] Lease Arrangement, Type Lease Arrangement Type [Domain] New lease agreements. New Lease Agreement New Lease Agreements [Member] Subsequent Event Type Subsequent Event Type [Axis] Subsequent Event Type Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Counterparty Name Counterparty Name [Axis] Counterparty Name Repurchase Agreement Counterparty Name [Domain] Hudson 333 Twin Dolphin Plaza, LLC. Hudson 333 Twin Dolphin Plaza, LLC Hudson Three Hundred And Thirty Three Twin Dolphin Plaza Limited Liability Company [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Letter of Credit Letter Of Credit [Member] Seventh amendment to current lease. Seventh Amendment to Current Lease Seventh Amendment To Current Lease [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Area of office space leased Area Of Office Space Leased Current lease, leased date Lease Initiation Date Lease commencement description. Lease termination description. Lease term. Lease commencement description Lease Commencement Description Lease termination description Lease Termination Description Lease term Lease Term Operating leases rent expense in first year. Operating leases rent expense in final year. Operating lease one-time improvement allowance. Annual base rent for the first year of lease term Operating Leases Rent Expense In First Year Rent for the final year of lease term Operating Leases Rent Expense In Final Year One-time improvement allowance Operating Lease One Time Improvement Allowance Line of credit facility capacity available for specific purpose other than for trade purchases at end of lease term. Letter of credit amount Line Of Credit Facility Capacity Available For Specific Purpose Other Than For Trade Purchases Letter of credit amount at the end of lease term Line Of Credit Facility Capacity Available For Specific Purpose Other Than For Trade Purchases At End Of Lease Term Lease expiration date Lease Expiration Date1 Operating leases future minimum payments due in five years and thereafter. 2015 (six months remaining) Operating Leases Future Minimum Payments Remainder Of Fiscal Year 2016 Operating Leases Future Minimum Payments Due In Two Years 2017 Operating Leases Future Minimum Payments Due In Three Years 2018 Operating Leases Future Minimum Payments Due In Four Years 2019 and thereafter Operating Leases Future Minimum Payments Due In Five Years And Thereafter Total minimum lease payments Operating Leases Future Minimum Payments Due