2101100 - Disclosure - The Business and Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2401403 - Disclosure - The Business and Summary of Significant Accounting Policies (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 2401407 - Disclosure - The Business and Summary of Significant Accounting Policies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2201201 - Disclosure - The Business and Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2401404 - Disclosure - The Business and Summary of Significant Accounting Policies (Reconciliation of Liabilities Measured at Fair Value on a Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 2401406 - Disclosure - The Business and Summary of Significant Accounting Policies (Schedule of Accrued Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2401405 - Disclosure - The Business and Summary of Significant Accounting Policies (Schedule of Prepaid and Other Current Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 2301302 - Disclosure - The Business and Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 2105100 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 2405403 - Disclosure - Commitments and Contingencies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2405402 - Disclosure - Commitments and Contingencies (Schedule of Future Minimum Rental Payments for Operating Leases) (Details) link:presentationLink link:calculationLink link:definitionLink 2405404 - Disclosure - Commitments and Contingencies (Schedule of Future Minimum Sublease Rental Payments for Operating Leases) (Details) (Details) link:presentationLink link:calculationLink link:definitionLink 2305301 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 1001000 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 1004000 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 1002000 - Statement - Consolidated Statements of Operations and Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 1003000 - Statement - Consolidated Statements of Stockholders' Equity (Deficit) link:presentationLink link:calculationLink link:definitionLink 1003501 - Statement - Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0001000 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 2108100 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - Income Taxes (Components of Deferred Tax Assets and Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 2408404 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2408402 - Disclosure - Income Taxes (Reconciliation of the Difference between the Benefit for Income Taxes and Income Taxes at the Statutory U.S. Federal Income Tax Rate) (Alternate) (Details) link:presentationLink link:calculationLink link:definitionLink 2408405 - Disclosure - Income Taxes (Summary of Uncertain Tax Benefit) (Details) link:presentationLink link:calculationLink link:definitionLink 2308301 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 2102100 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 2402404 - Disclosure - Investments - Available for Sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 2402402 - Disclosure - Investments - Summary of Available-for-Sale Securities (Details) link:presentationLink link:calculationLink link:definitionLink 2402403 - Disclosure - Investments - Summary of Investments with Unrealized Losses, Aggregated by Investment Type and the Length of Time (Details) link:presentationLink link:calculationLink link:definitionLink 2302301 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 2104100 - Disclosure - Loan Payable link:presentationLink link:calculationLink link:definitionLink 2404401 - Disclosure - Loan Payable (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2103100 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 2403402 - Disclosure - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 2303301 - Disclosure - Property and Equipment (Tables) link:presentationLink link:calculationLink link:definitionLink 2110100 - Disclosure - Selected Quarterly Financial Data (Unaudited) link:presentationLink link:calculationLink link:definitionLink 2410402 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 2310301 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 2109100 - Disclosure - Significant Agreements link:presentationLink link:calculationLink link:definitionLink 2409401 - Disclosure - Significant Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 2107100 - Disclosure - Stockholders' Equity (Deficit) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - Stockholders' Equity (Deficit) (Assumption Used to Determine the Fair Value of Options Granted) (Details) link:presentationLink link:calculationLink link:definitionLink 2407410 - Disclosure - Stockholders' Equity (Deficit) (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 2407409 - Disclosure - Stockholders' Equity (Deficit) (Schedule of Allocation of Recognized Period Costs) (Details) link:presentationLink link:calculationLink link:definitionLink 2407405 - Disclosure - Stockholders' Equity (Deficit) (Schedule of other information regarding stock options) (Details) link:presentationLink link:calculationLink link:definitionLink 2407407 - Disclosure - Stockholders' Equity (Deficit) (Schedule of Share-Based Compensation) (Details) link:presentationLink link:calculationLink link:definitionLink 2407406 - Disclosure - Stockholders' Equity (Deficit) (Schedule of Share-based Compensation, Shares Authorized) (Details) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - Stockholders' Equity (Deficit) (Schedule of Shares Reserved for Future Issuance) (Details) link:presentationLink link:calculationLink link:definitionLink 2407408 - Disclosure - Stockholders' Equity (Deficit) (Summary of Activity Related to Restricted Stock Units) (Details) link:presentationLink link:calculationLink link:definitionLink 2407404 - Disclosure - Stockholders' Equity (Deficit) (Summary of Activity Related to Stock Options) (Details) link:presentationLink link:calculationLink link:definitionLink 2307301 - Disclosure - Stockholders' Equity (Deficit) (Tables) link:presentationLink link:calculationLink link:definitionLink 2111100 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink