00100 - Statement - CONDENSED BALANCE SHEETS
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00200 - Statement - CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
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00400 - Statement - CONDENSED STATEMENTS OF CASH FLOWS
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40301 - Disclosure - Restricted Cash (Details)
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40501 - Disclosure - Fair Value Measurements - (Details)
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00090 - Document - Document and Entity Information
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00105 - Statement - CONDENSED BALANCE SHEETS - (Parenthetical)
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00300 - Statement - CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY
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00305 - Statement - CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)
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10701 - Disclosure - Stock-Based Compensation
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10801 - Disclosure - Net Loss Per Share Attributable to Common Stockholders
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10901 - Disclosure - Income Taxes
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30703 - Disclosure - Stock-Based Compensation (Tables)
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30803 - Disclosure - Net Loss Per Share Attributable to Common Stockholders (Tables)
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40601 - Disclosure - Former Agreement with Eli Lilly and Company (Details)
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40701 - Disclosure - Stock-Based Compensation - Stock options (Details)
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40702 - Disclosure - Stock-Based Compensation - Stock based compensation expense (Details)
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40703 - Disclosure - Stock-Based Compensation - Assumptions (Details)
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40801 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Other (Details)
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40802 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Anti-dilutive effect (Details)
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40901 - Disclosure - Income Taxes - (Details)
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10101 - Disclosure - Nature of the Business
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10201 - Disclosure - Summary of Significant Accounting Policies
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10301 - Disclosure - Restricted Cash
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10501 - Disclosure - Fair Value Measurements
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10601 - Disclosure - Former Agreement with Eli Lilly and Company
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11001 - Disclosure - Commitments and Contingencies
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20202 - Disclosure - Summary of Significant Accounting Policies (Policies)
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30303 - Disclosure - Restricted Cash (Tables)
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30503 - Disclosure - Fair Value Measurements (Tables)
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