000 - Document - Document And Entity Information link:calculationLink link:definitionLink link:presentationLink 001 - Statement - Condensed Balance Sheets (Current Period Unaudited) link:calculationLink link:definitionLink link:presentationLink 002 - Statement - Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) link:calculationLink link:definitionLink link:presentationLink 003 - Statement - Condensed Statements of Operations (Unaudited) link:calculationLink link:definitionLink link:presentationLink 004 - Statement - Condensed Statements of Cash Flows (Unaudited) link:calculationLink link:definitionLink link:presentationLink 005 - Statement - Condensed Statements of Shareholders' Equity (Unaudited) link:calculationLink link:definitionLink link:presentationLink 006 - Disclosure - Note 1 - Interim Financial Reporting link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Revenues link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Selected Balance Sheet Information link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Warranty Reserve link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Financing Arrangements link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Common Stock link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Share-based Compensation link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Segment Reporting link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Earnings Per Common Share ("EPS") link:calculationLink link:definitionLink link:presentationLink 995463 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995464 - Disclosure - Note 2 - Revenues (Tables) link:calculationLink link:definitionLink link:presentationLink 995465 - Disclosure - Note 3 - Selected Balance Sheet Information (Tables) link:calculationLink link:definitionLink link:presentationLink 995466 - Disclosure - Note 4 - Warranty Reserve (Tables) link:calculationLink link:definitionLink link:presentationLink 995467 - Disclosure - Note 8 - Share-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Note 11 - Earnings Per Common Share ("EPS") (Tables) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 2 - Revenues (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 2 - Revenues - Disaggregation of Revenue (Details) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 2 - Revenues - Contract with Customer Assets and Receivable Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 2 - Revenues - Contract with Customer Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 3 - Selected Balance Sheet Information - Inventory Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 3 - Selected Balance Sheet Information - Other Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 3 - Selected Balance Sheet Information - Other Accrued Liabilities Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 4 - Warranty Reserve (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 4 - Warranty Reserve - Changes in Warranty Reserve Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 5 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 6 - Financing Arrangements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 7 - Common Stock (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 8 - Share-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 8 - Share-based Compensation - Stock Options Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 8 - Share-based Compensation - Valuation Assumptions Schedule (Details) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 10 - Segment Reporting (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 11 - Earnings Per Common Share ("EPS") (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 11 - Earnings Per Common Share ("EPS") - Computations of Basic and Diluted EPS (Details) link:calculationLink link:definitionLink link:presentationLink