000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Deficit) (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 - Description of the Business and Basis of Presentation link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Inventories, Net link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Investment in Equity Securities link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - COVID Loans link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Warrants link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Segment Information link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Subsequent Events link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 3 - Inventories, Net (Tables) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 4 - Investment in Equity Securities (Tables) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 5 - COVID Loans (Tables) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 6 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 7 - Stockholders' Equity (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 8 - Warrants (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 9 - Commitments and Contingencies (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 10 - Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 1 - Description of the Business and Basis of Presentation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Schedule of Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 3 - Inventories, Net - Schedule of Inventory (Details) link:calculationLink link:definitionLink link:presentationLink 995477 - 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Disclosure - Note 6 - Fair Value Measurements - Reconciliation of Liabilities with Unobservable Inputs (Details) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 7 - Stockholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 7 - Stockholders' Equity - Schedule of Preferred Stock Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 7 - Stockholders' Equity - Measurement Inputs to Compute Incremental Value (Details) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 7 - Stockholders' Equity - Schedule of Dividends (Details) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 7 - Stockholders' Equity - RSU Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 8 - Warrants (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 8 - Warrants - Schedule of Warrant Activity (Details) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 9 - Commitments and Contingencies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 9 - Commitments and Contingencies - Schedule of Lease Information (Details) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 9 - Commitments and Contingencies - Schedule of Lease Maturity (Details) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 10 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 10 - Segment Information - Schedule of Assets by Segmentation (Details) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 10 - Segment Information - Schedule of Net Income (Loss) by Segment (Details) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 10 - Segment Information - Schedule of Revenue by Geographic Area (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 11 - Subsequent Events (Details Textual) link:calculationLink link:definitionLink link:presentationLink