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Outstanding Recovery Compensation Amount Individual: Individual [Axis] Weighted-average common shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Research and Development Arrangement, Contract to Perform for Others, Type [Domain] Research and Development Arrangement, Contract to Perform for Others, Type [Domain] Underlying Security Market Price Change Underlying Security Market Price Change, Percent ENTR-601-44 ENTR-601-44 [Member] ENTR-601-44 Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Other non-current assets Increase (Decrease) in Other Noncurrent Assets Revenue from Contract with Customer [Abstract] ENTR-601-51 ENTR-601-51 [Member] 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Payment Award, Equity Instruments Other than Options, Forfeited in Period General and administrative General and administrative expenses General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Offering price per share (in dollars per share) Sale of Stock, Price Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Pre-Funded Warrant Pre-Funded Warrant [Member] Pre-Funded Warrant Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Total securities with a maturity of one year or less Debt Securities, Available-for-Sale, Excluding Accrued Interest, Current Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Total Assets, Fair Value Disclosure Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid‑in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Market value of marketable securities Debt Securities, Available-for-Sale, Unrealized Loss Position Supplemental cash flow disclosures: Supplemental Cash Flow Elements [Abstract] Laboratory equipment Equipment [Member] Strategic collaboration agreement, term Strategic Collaboration and License Agreement, Term of Contract Strategic Collaboration and License Agreement, Term of Contract Sales Agreement Sales Agreement [Member] Sales Agreement [Member] Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Company Selected Measure Amount Company Selected Measure Amount Investments, Debt and Equity Securities [Abstract] Cash, Cash Equivalents and Restricted Cash Cash and Cash Equivalents Disclosure [Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Provision for income taxes Provision for (benefit from) income taxes Income Tax Expense (Benefit) Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Research and Development Arrangement, Contract to Perform for Others, Type [Axis] Award Timing Method Award Timing Method [Text Block] Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net loss Net loss Net (loss) income Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Restatement Determination Date: Restatement Determination Date [Axis] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Interest receivable Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Current Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]