2101100 - Disclosure - The Business and Summary of Significant Accounting Policies
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2401404 - Disclosure - The Business and Summary of Significant Accounting Policies (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details)
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2401403 - Disclosure - The Business and Summary of Significant Accounting Policies (Narrative) (Details)
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2201201 - Disclosure - The Business and Summary of Significant Accounting Policies (Policy)
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2401405 - Disclosure - The Business and Summary of Significant Accounting Policies (Schedule of Accrued Liabilities) (Details)
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2301302 - Disclosure - The Business and Summary of Significant Accounting Policies (Tables)
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2104100 - Disclosure - Commitments and Contingencies
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2404401 - Disclosure - Commitments and Contingencies (Narrative) (Details)
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1001000 - Statement - Consolidated Balance Sheets
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1001501 - Statement - Consolidated Balance Sheets (Parenthetical)
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1003000 - Statement - Consolidated Statements of Cash Flows
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1002000 - Statement - Consolidated Statements of Operations and Comprehensive Loss
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0001000 - Document - Document And Entity Information
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2105100 - Disclosure - Equity Transactions and Share-based Compensation
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2405402 - Disclosure - Equity Transactions and Share-based Compensation - Common Stock Narrative (Details)
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2405403 - Disclosure - Equity Transactions and Share-based Compensation - Stock-based Compensation (Narrative) (Details)
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2405404 - Disclosure - Equity Transactions and Share-based Compensation - Stock-based Compensation (Schedule of Stock-based Compensation Expense) (Details)
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2305301 - Disclosure - Equity Transactions and Share-based Compensation - Stock-based Compensation (Tables)
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2106100 - Disclosure - Income Taxes
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2406401 - Disclosure - Income Taxes (Narrative) (Details)
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2102100 - Disclosure - Investments
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2402404 - Disclosure - Investments - Schedule of Investment Maturity (Details)
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2402402 - Disclosure - Investments - Summary of Available-for-Sale securities (Details)
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2402403 - Disclosure - Investments - Summary of Investments with Unrealized Losses, Aggregated by Investment Type and the Length of Time (Details)
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2302301 - Disclosure - Investments (Tables)
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2107100 - Disclosure - Significant Agreements
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2407401 - Disclosure - Significant Agreements (Details)
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2108100 - Disclosure - Subsequent Events
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