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 Shareholders' 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 - General link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Stock Incentive Plan and Other Share-based Compensation link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Allowance for Credit Losses for Trade Accounts Receivable link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Inventories link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Product Warranties link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Long-term Debt and Notes Payable link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Leases link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Net Loss Per Share link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Business and Credit Concentrations link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Segment Information link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Revenue Recognition link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Redeemable Restricted Common Stock link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Contingencies link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - New Accounting Standards Not Yet Adopted link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 3 - Allowance for Credit Losses for Trade Accounts Receivable (Tables) link:calculationLink link:definitionLink link:presentationLink 022 - Disclosure - Note 4 - Inventories (Tables) link:calculationLink link:definitionLink link:presentationLink 023 - Disclosure - Note 5 - Product Warranties (Tables) link:calculationLink link:definitionLink link:presentationLink 024 - Disclosure - Note 7 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 025 - Disclosure - Note 9 - Net Loss Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 026 - Disclosure - Note 11 - Segment Information (Tables) link:calculationLink link:definitionLink link:presentationLink 027 - Disclosure - Note 12 - Revenue Recognition (Tables) link:calculationLink link:definitionLink link:presentationLink 028 - Disclosure - Note 2 - Stock Incentive Plan and Other Share-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 029 - Disclosure - Note 3 - Allowance for Credit Losses for Trade Accounts Receivable - Summary of Changes in the Allowance for Doubtful Accounts for Trade Accounts Receivable (Details) link:calculationLink link:definitionLink link:presentationLink 030 - Disclosure - Note 4 - Inventories - Components of Inventories (Details) link:calculationLink link:definitionLink link:presentationLink 031 - Disclosure - Note 5 - Product Warranties (Details Textual) link:calculationLink link:definitionLink link:presentationLink 032 - Disclosure - Note 5 - Product Warranties - Changes in Accrual for Product Warranties (Details) link:calculationLink link:definitionLink link:presentationLink 033 - Disclosure - Note 6 - Long-term Debt and Notes Payable (Details Textual) link:calculationLink link:definitionLink link:presentationLink 034 - Disclosure - Note 7 - Leases (Details Textual) link:calculationLink link:definitionLink link:presentationLink 035 - Disclosure - Note 7 - Leases - Future Payments Due (Details) link:calculationLink link:definitionLink link:presentationLink 036 - Disclosure - Note 9 - Net Loss Per Share (Details Textual) link:calculationLink link:definitionLink link:presentationLink 037 - Disclosure - Note 9 - Net Loss Per Share - Components of Reconciliation of Numerators and Denominators Net Loss Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 038 - Disclosure - Note 10 - Business and Credit Concentrations (Details Textual) link:calculationLink link:definitionLink link:presentationLink 039 - Disclosure - Note 11 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 040 - Disclosure - Note 11 - Segment Reporting - Schedule of Segment Reporting Information, by Segment (Details) link:calculationLink link:definitionLink link:presentationLink 041 - Disclosure - Note 12 - Revenue Recognition (Details Textual) link:calculationLink link:definitionLink link:presentationLink 042 - Disclosure - Note 12 - Revenue Recognition - Schedule of Revenue from External Customers by Geographical Areas (Details) link:calculationLink link:definitionLink link:presentationLink 043 - Disclosure - Note 13 - Redeemable Restricted Common Stock (Details Textual) link:calculationLink link:definitionLink link:presentationLink