000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Consolidated Balance Sheets (Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Consolidated Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed 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 - Unaudited Interim Condensed Consolidated Financial Statements link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Concentrations of Credit Risk link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Inventories and Major Vendors link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Other Current Assets link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Accrued Expenses link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Income (Loss) Per Share link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Stock-based Compensation and Equity Transactions link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Segment Information link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Intangible Assets link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Commitments link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Term Loan and Line of Credit link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Cash Dividends and Declared Dividends link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 2 - Concentrations of Credit Risk (Tables) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 3 - Inventories and Major Vendors (Tables) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 4 - Other Current Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 5 - Accrued Expenses (Tables) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 6 - Income (Loss) Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 7 - Stock-based Compensation and Equity Transactions (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 8 - Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 10 - Intangible Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 11 - Commitments (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 1 - Unaudited Interim Condensed Consolidated Financial Statements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 2 - Concentrations of Credit Risk (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 2 - Concentrations of Credit Risk - Schedule of Customer Concentration (Details) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 3 - Inventories and Major Vendors (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 3 - Inventories and Major Vendors - Schedule of Inventory (Details) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 4 - Other Current Assets - Schedule of Other Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 5 – Accrued Expenses - Schedule of Accrued Expenses and Other Current Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 6 - Income (Loss) Per Share (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 6 - Income (Loss) Per Share - Schedule of Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 7 - Stock-based Compensation and Equity Transactions 1 (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 7 - Stock-based Compensation and Equity Transactions 2 (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 7 - Stock-based Compensation and Equity Transactions - Schedule of Valuation Assumption (Details) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 7 - Stock-based Compensation and Equity Transactions - Schedule of Stock Options (Details) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 8 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 8 - Segment Information - Schedule of Segment Information (Details) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 8 - Segment Information - Schedule of Product Revenue (Details) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 8 - Segment Information - Schedule of Revenue By Region (Details) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 9 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 10 - Intangible Assets (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 10 - Intangible Assets - Schedule of Intangible Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 10 - Intangible Assets - Schedule of Intangible Assets (Details) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 11 - Commitments (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 11 - Commitments - Schedule of Lease Costs (Details) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 12 - Term Loan and Line of Credit 1 (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 12 - Term Loan and Line of Credit 2 (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 13 - Cash Dividends and Declared Dividends (Details Textual) link:calculationLink link:definitionLink link:presentationLink