000 - Document - Document And Entity Information
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001 - Statement - Condensed Consolidated Balance Sheets (Unaudited)
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002 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals)
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003 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited)
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004 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parentheticals)
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005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)
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006 - Disclosure - Note 1 - Basis of Presentation and Significant Accounting Policies
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007 - Disclosure - Note 2 - Investments
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008 - Disclosure - Note 3 - Notes Receivable
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009 - Disclosure - Note 4 - Stockholders' Equity
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010 - Document - Note 5 - Fair Value of Financial Instruments
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011 - Disclosure - Note 6 - Concentration of Credit Risk and Significant Customers
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012 - Disclosure - Significant Accounting Policies (Policies)
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013 - Disclosure - Note 1 - Basis of Presentation and Significant Accounting Policies (Tables)
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014 - Disclosure - Note 2 - Investments (Tables)
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015 - Disclosure - Note 4 - Stockholders' Equity (Tables)
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016 - Disclosure - Note 5 - Fair Value of Financial Instruments (Tables)
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017 - Disclosure - Note 1 - Basis of Presentation and Significant Accounting Policies (Details Textual)
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018 - Statement - Note 1 - Basis of Presentation and Significant Accounting Policies - Schedule of Earnings Per Share (Details)
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019 - Disclosure - Note 2 - Investments (Details Textual)
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020 - Statement - Note 2 - Investments - Schedule of Available-For-Sale Equity Securities Reconciliation (Details)
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021 - Disclosure - Note 3 - Notes Receivable (Details Textual)
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022 - Disclosure - Note 4 - Stockholders' Equity (Details Textual)
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023 - Statement - Note 4 - Stockholders' Equity - Summary of Stock Option and Warrant Activity (Details)
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024 - Statement - Note 5 - Fair Value of Financial Instruments - Schedule of Fair Value, Assets Measured On Recurring Basis (Details)
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025 - Disclosure - Note 6 - Concentration of Credit Risk and Significant Customers (Details Textual)
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