000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Consolidated Balance Sheets (Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Consolidated Balance Sheets (Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Consolidated Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Consolidated Statements of Stockholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Investments and Fair Value Measurement link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Discontinued Operations link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Sale of Future Payments link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Warrants link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Stock-based Compensation link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Net Loss Per Share of Common Stock link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Segment Information link:calculationLink link:definitionLink link:presentationLink 995445 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995446 - Disclosure - Note 2 - Investments and Fair Value Measurement (Tables) link:calculationLink link:definitionLink link:presentationLink 995447 - Disclosure - Note 3 - Discontinued Operations (Tables) link:calculationLink link:definitionLink link:presentationLink 995448 - Disclosure - Note 7 - Warrants (Tables) link:calculationLink link:definitionLink link:presentationLink 995449 - Disclosure - Note 8 - Stock-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995450 - Disclosure - Note 9 - Net Loss Per Share of Common Stock (Tables) link:calculationLink link:definitionLink link:presentationLink 995451 - Disclosure - Note 10 - Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995452 - Disclosure - Note 2 - Investments and Fair Value Measurement (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995453 - Disclosure - Note 2 - Investments and Fair Value Measurement - Summary of Cash, Cash Equivalents and Investments (Details) link:calculationLink link:definitionLink link:presentationLink 995454 - Disclosure - Note 2 - Investments and Fair Value Measurement - Fair Value of Financial Assets and Liabilities by Level Within Fair Value Hierarchy (Details) link:calculationLink link:definitionLink link:presentationLink 995455 - Disclosure - Note 2 - Investments and Fair Value Measurement - Summary of Changes in Fair Value of Level III Financial Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995456 - Disclosure - Note 3 - Discontinued Operations (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995457 - Disclosure - Note 3 - Discontinued Operations - Summary of Discontinued Operation (Details) link:calculationLink link:definitionLink link:presentationLink 995458 - Disclosure - Note 4 - Sale of Future Payments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995459 - Disclosure - Note 6 - Stockholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995460 - Disclosure - Note 7 - Warrants (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995461 - Disclosure - Note 7 - Warrants - Schedule of Warrant Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995462 - Disclosure - Note 8 - Stock-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Note 8 - Stock-based Compensation - Stock-based Compensation Expense (Details) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 8 - Stock-based Compensation - Stock-based Compensation Expense 2 (Details) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 8 - Stock-based Compensation - Restricted Stock Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 8 - Stock-based Compensation - Option Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 9 - Net Loss Per Share of Common Stock (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 9 - Net Loss Per Share of Common Stock - Common Stock Excluded From Computation of Diluted Net Loss Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 10 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 10 - Segment Information - Summary of Segment Loss (Details) link:calculationLink link:definitionLink link:presentationLink