101 - Document - Document and Entity Information link:calculationLink link:presentationLink link:definitionLink 103 - Statement - Condensed Consolidated Balance Sheets link:calculationLink link:presentationLink link:definitionLink 104 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 105 - Statement - Condensed Consolidated Statements of Operations link:calculationLink link:presentationLink link:definitionLink 106 - Statement - Condensed Consolidated Statements of Cash Flows link:calculationLink link:presentationLink link:definitionLink 107 - Disclosure - Nature of Business and Operations link:calculationLink link:presentationLink link:definitionLink 108 - Disclosure - Significant Accounting Policies link:calculationLink link:presentationLink link:definitionLink 109 - Disclosure - Net Loss Per Share Attributable to Common Stockholders link:calculationLink link:presentationLink link:definitionLink 110 - Disclosure - Accrued Expenses link:calculationLink link:presentationLink link:definitionLink 111 - Disclosure - Convertible Notes Payable to Shareholders link:calculationLink link:presentationLink link:definitionLink 112 - Disclosure - Stock Option Plan link:calculationLink link:presentationLink link:definitionLink 113 - Disclosure - Fair Value Measurements link:calculationLink link:presentationLink link:definitionLink 114 - Disclosure - Income Taxes link:calculationLink link:presentationLink link:definitionLink 115 - Disclosure - Related Party Transactions link:calculationLink link:presentationLink link:definitionLink 116 - Disclosure - Subsequent Event link:calculationLink link:presentationLink link:definitionLink 117 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:presentationLink link:definitionLink 118 - Disclosure - Net Loss Per Share Attributable to Common Stockholders (Tables) link:calculationLink link:presentationLink link:definitionLink 119 - Disclosure - Accrued Expenses (Tables) link:calculationLink link:presentationLink link:definitionLink 120 - Disclosure - Stock Option Plan (Tables) link:calculationLink link:presentationLink link:definitionLink 121 - Disclosure - Fair Value Measurements (Tables) link:calculationLink link:presentationLink link:definitionLink 122 - Disclosure - Nature of Business and Operations - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 123 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 124 - Disclosure - Net Loss Per Share Attributable to Common Stockholders - Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-Average Shares Outstanding (Detail) link:calculationLink link:presentationLink link:definitionLink 125 - Disclosure - Accrued Expenses - Schedule of Accrued Expenses (Detail) link:calculationLink link:presentationLink link:definitionLink 126 - Disclosure - Convertible Notes Payable to Shareholders - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 127 - Disclosure - Stock Option Plan - Summary of Assumptions Used in Black-Scholes Option-Pricing Model for Stock Options Granted to Employees, Directors and Non Employees (Detail) link:calculationLink link:presentationLink link:definitionLink 128 - Disclosure - Stock Option Plan - Summary of Stock Option Activity for Employee, Director and Nonemployee Awards under All Stock Option Plans (Detail) link:calculationLink link:presentationLink link:definitionLink 129 - Disclosure - Stock Option Plan - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 130 - Disclosure - Fair Value Measurements - Summary of Financial Assets and Liabilities Measured on Recurring Basis at Fair Value (Detail) link:calculationLink link:presentationLink link:definitionLink 131 - Disclosure - Fair Value Measurements - Reconciliation of Company's Preferred Stock Warrant Liabilities Measured at Fair Value on Recurring Basis Using Unobservable Inputs (Level3) (Detail) link:calculationLink link:presentationLink link:definitionLink 132 - Disclosure - Fair Value Measurements - Fair Value of Preferred Stock Warrant Liability Calculated by Black-Scholes Option Pricing Model (Detail) link:calculationLink link:presentationLink link:definitionLink 133 - Disclosure - Income Taxes - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 134 - Disclosure - Related Party Transactions - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink