000 - Document - Document And Entity Information
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001 - Statement - Consolidated Balance Sheets
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002 - Statement - Consolidated Balance Sheets (Parentheticals)
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003 - Statement - Consolidated Statements of Operations
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004 - Statement - Consolidated Statements of Stockholders' Equity
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005 - Statement - Consolidated Statements of Cash Flows
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006 - Statement - Consolidated Statements of Cash Flows (Parentheticals)
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007 - Disclosure - Note 1 - Description of Business
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008 - Disclosure - Note 2 - Summary of Significant Accounting Policies
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009 - Disclosure - Note 3 - Property and Equipment
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010 - Disclosure - Note 4 - Accrued Expenses
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011 - Disclosure - Note 5 - Grants and Collaboration Revenue
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012 - Disclosure - Note 6 - Commitments
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013 - Disclosure - Note 7 - Preferred Stock
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014 - Disclosure - Note 8 - Common Stock
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015 - Disclosure - Note 9 - Stock-based Compensation
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016 - Disclosure - Note 10 - Retirement Plan
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017 - Disclosure - Note 11 - Income Taxes
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018 - Disclosure - Note 12 - Subsequent Events
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019 - Document - Schedule II - Valuation and Qualifying Accounts
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020 - Disclosure - Significant Accounting Policies (Policies)
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021 - Disclosure - Note 3 - Property and Equipment (Tables)
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022 - Disclosure - Note 4 - Accrued Expenses (Tables)
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023 - Disclosure - Note 8 - Common Stock (Tables)
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024 - Disclosure - Note 9 - Stock-based Compensation (Tables)
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025 - Disclosure - Note 11 - Income Taxes (Tables)
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026 - Disclosure - Schedule II - Valuation and Qualifying Accounts (Tables)
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027 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual)
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028 - Disclosure - Note 3 - Property and Equipment (Details Textual)
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029 - Disclosure - Note 3 - Property and Equipment - Schedule of Property and Equipment (Details)
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030 - Disclosure - Note 4 - Accrued Expenses - Schedule of Accrued Expenses (Details)
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031 - Disclosure - Note 5 - Grants and Collaboration Revenue (Details Textual)
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032 - Disclosure - Note 6 - Commitments (Details Textual)
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033 - Disclosure - Note 7 - Preferred Stock (Details Textual)
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034 - Disclosure - Note 8 - Common Stock (Details Textual)
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035 - Disclosure - Note 8 - Common Stock - Activity of Stock Option Plan (Details)
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036 - Disclosure - Note 8 - Common Stock - Activity of Stock Purchase Warrants (Details)
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037 - Disclosure - Note 8 - Common Stock - Common Stock Reserved for Future Issuance (Details)
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038 - Disclosure - Note 9 - Stock-based Compensation (Details Textual)
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039 - Disclosure - Note 9 - Stock-based Compensation - Significant Assumption Used in Fair Value Calculation (Details)
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040 - Disclosure - Note 9 - Stock-based Compensation - Allocation of Stock Option Expense (Details)
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041 - Disclosure - Note 9 - Stock-based Compensation - Additional Information for Stock Options (Details)
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042 - Disclosure - Note 10 - Retirement Plan (Details Textual)
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043 - Disclosure - Note 11 - Income Taxes (Details Textual)
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044 - Disclosure - Note 11 - Income Taxes - Deferred Tax Assets and Liabilities (Details)
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045 - Disclosure - Note 11 - Income Taxes - Reconciliation of Income Tax Benefit (Details)
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046 - Disclosure - Note 12 - Subsequent Events (Details Textual)
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047 - Disclosure - Schedule II - Valuation and Qualifying Accounts (Details)
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