000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Consolidated Balance Sheets link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Consolidated Balance Sheets (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Consolidated Statements of Operations link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Consolidated Statements of Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Consolidated Statements of Cash Flows link:calculationLink link:definitionLink link:presentationLink 995552 - Disclosure - Note 1 - General, Liquidity and Basis of Presentation link:calculationLink link:definitionLink link:presentationLink 995553 - Disclosure - Note 2 - Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 995554 - Disclosure - Note 3 - Prepaid Expenses and Other Current Assets link:calculationLink link:definitionLink link:presentationLink 995555 - Disclosure - Note 4 - Real Property and Other Income, Expense link:calculationLink link:definitionLink link:presentationLink 995556 - Disclosure - Note 5 - Property and Equipment link:calculationLink link:definitionLink link:presentationLink 995557 - Disclosure - Note 6 - Intangible Assets link:calculationLink link:definitionLink link:presentationLink 995558 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation link:calculationLink link:definitionLink link:presentationLink 995559 - Disclosure - Note 8 - Employee 401(k) Benefit Plan link:calculationLink link:definitionLink link:presentationLink 995560 - Disclosure - Note 9 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 995561 - Disclosure - Note 10 - Commitments link:calculationLink link:definitionLink link:presentationLink 995562 - Disclosure - Note 11 - 2020 Cash Incentive Bonus Plan link:calculationLink link:definitionLink link:presentationLink 995563 - Disclosure - Note 12 - Contingencies link:calculationLink link:definitionLink link:presentationLink 995564 - Disclosure - Note 13 - Warrant Dividend Distribution link:calculationLink link:definitionLink link:presentationLink 995565 - Disclosure - Note 14 - Restructuring Activities link:calculationLink link:definitionLink link:presentationLink 995569 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995570 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables) link:calculationLink link:definitionLink link:presentationLink 995571 - Disclosure - Note 3 - Prepaid Expenses and Other Current Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995572 - Disclosure - Note 4 - Real Property and Other Income, Expense (Tables) link:calculationLink link:definitionLink link:presentationLink 995573 - Disclosure - Note 5 - Property and Equipment (Tables) link:calculationLink link:definitionLink link:presentationLink 995574 - Disclosure - Note 6 - Intangible Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995575 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995576 - Disclosure - Note 9 - Income Taxes (Tables) link:calculationLink link:definitionLink link:presentationLink 995577 - Disclosure - Note 13 - Warrant Dividend Distribution (Tables) link:calculationLink link:definitionLink link:presentationLink 995578 - Disclosure - Note 1 - General, Liquidity and Basis of Presentation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995579 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995580 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Quantitative Information of Warrants (Details) link:calculationLink link:definitionLink link:presentationLink 995581 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Summary of CODM Segments (Details) link:calculationLink link:definitionLink link:presentationLink 995582 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Calculation of Net Loss Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995583 - Disclosure - Note 3 - Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995584 - Disclosure - Note 4 - Real Property and Other Income, Expense (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995585 - Disclosure - Note 4 - Real Property and Other Income, Expense - Components of Other Income, Net (Details) link:calculationLink link:definitionLink link:presentationLink 995586 - Disclosure - Note 4 - Real Property and Other Income, Expense - Schedule of Gross Rental Income under Third-party Leases (Details) link:calculationLink link:definitionLink link:presentationLink 995587 - Disclosure - Note 5 - Property and Equipment (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995588 - Disclosure - Note 5 - Property and Equipment - Components of Property and Equipment (Details) link:calculationLink link:definitionLink link:presentationLink 995589 - Disclosure - Note 6 - Intangible Assets (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995590 - Disclosure - Note 6 - Intangible Assets - Components of Intangible Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995591 - Disclosure - Note 6 - Intangible Assets - Amortization Expense for Finite-lived Intangible Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995592 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995593 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation - Stock Option Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995594 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation - Schedule of Stock Options by Exercise Price (Details) link:calculationLink link:definitionLink link:presentationLink 995595 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation - Stock Option Valuation Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 995596 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation - Stock Option and Performance Award Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995597 - Disclosure - Note 7 - Stockholders' Equity and Stock-based Compensation - Stock-based Compensation Expense (Details) link:calculationLink link:definitionLink link:presentationLink 995598 - Disclosure - Note 8 - Employee 401(k) Benefit Plan (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995599 - Disclosure - Note 9 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995600 - Disclosure - Note 9 - Income Taxes - Schedule of Effective Income Tax Reconciliation (Details) link:calculationLink link:definitionLink link:presentationLink 995601 - Disclosure - Note 9 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995602 - Disclosure - Note 9 - Income Taxes - Schedule of Unrecognized Tax Benefits (Details) link:calculationLink link:definitionLink link:presentationLink 995603 - Disclosure - Note 10 - Commitments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995604 - Disclosure - Note 11 - 2020 Cash Incentive Bonus Plan (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995605 - Disclosure - Note 12 - Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995606 - Disclosure - Note 13 - Warrant Dividend Distribution (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995607 - Disclosure - Note 13 - Warrant Dividend Distribution - Changes in Warrants Outstanding and Warrant Liability (Details) link:calculationLink link:definitionLink link:presentationLink 995608 - Disclosure - Note 14 - Restructuring Activities (Details Textual) link:calculationLink link:definitionLink link:presentationLink