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 Loss (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 - Organization and Summary of Significant Accounting Policies link:calculationLink link:definitionLink link:presentationLink 007 - Disclosure - Note 2 - Fair Value Measurements link:calculationLink link:definitionLink link:presentationLink 008 - Disclosure - Note 3 - Inventories link:calculationLink link:definitionLink link:presentationLink 009 - Disclosure - Note 4 - Prepaid and Other Current Assets link:calculationLink link:definitionLink link:presentationLink 010 - Disclosure - Note 5 - Leases link:calculationLink link:definitionLink link:presentationLink 011 - Disclosure - Note 6 - Accrued Expenses and Other Current Liabilities link:calculationLink link:definitionLink link:presentationLink 012 - Disclosure - Note 7 - Convertible Notes link:calculationLink link:definitionLink link:presentationLink 013 - Disclosure - Note 8 - Interest Expense and Other link:calculationLink link:definitionLink link:presentationLink 014 - Disclosure - Note 9 - Stockholders' Equity link:calculationLink link:definitionLink link:presentationLink 015 - Disclosure - Note 10 - Accumulated Other Comprehensive Income (Loss) link:calculationLink link:definitionLink link:presentationLink 016 - Disclosure - Note 11 - Net Loss Per Share link:calculationLink link:definitionLink link:presentationLink 017 - Disclosure - Note 12 - Stock-based Compensation link:calculationLink link:definitionLink link:presentationLink 018 - Disclosure - Note 13 - Segment Information link:calculationLink link:definitionLink link:presentationLink 019 - Disclosure - Note 14 - Revenue link:calculationLink link:definitionLink link:presentationLink 020 - Disclosure - Note 15 - Income Taxes link:calculationLink link:definitionLink link:presentationLink 021 - Disclosure - Note 16 - Commitments and Contingencies link:calculationLink link:definitionLink link:presentationLink 995468 - Disclosure - Significant Accounting Policies (Policies) link:calculationLink link:definitionLink link:presentationLink 995469 - Disclosure - Note 2 - Fair Value Measurements (Tables) link:calculationLink link:definitionLink link:presentationLink 995470 - Disclosure - Note 3 - Inventories (Tables) link:calculationLink link:definitionLink link:presentationLink 995471 - Disclosure - Note 4 - Prepaid and Other Current Assets (Tables) link:calculationLink link:definitionLink link:presentationLink 995472 - Disclosure - Note 5 - Leases (Tables) link:calculationLink link:definitionLink link:presentationLink 995473 - Disclosure - Note 6 - Accrued Expenses and Other Current Liabilities (Tables) link:calculationLink link:definitionLink link:presentationLink 995474 - Disclosure - Note 8 - Interest Expense and Other (Tables) link:calculationLink link:definitionLink link:presentationLink 995475 - Disclosure - Note 10 - Accumulated Other Comprehensive Income (Loss) (Tables) link:calculationLink link:definitionLink link:presentationLink 995476 - Disclosure - Note 11 - Net Loss Per Share (Tables) link:calculationLink link:definitionLink link:presentationLink 995477 - Disclosure - Note 12 - Stock-based Compensation (Tables) link:calculationLink link:definitionLink link:presentationLink 995478 - Disclosure - Note 14 - Revenue (Tables) link:calculationLink link:definitionLink link:presentationLink 995479 - Disclosure - Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995480 - Disclosure - Note 2 - Fair Value Measurements (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995481 - Disclosure - Note 2 - Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Details) link:calculationLink link:definitionLink link:presentationLink 995482 - Disclosure - Note 2 - Fair Value Measurements - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis 2 (Details) link:calculationLink link:definitionLink link:presentationLink 995483 - Disclosure - Note 2 - Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Financial Instruments (Details) link:calculationLink link:definitionLink link:presentationLink 995484 - Disclosure - Note 2 - Fair Value Measurements - Summary of Fair Value Measurement Inputs and Valuation Techniques (Details) link:calculationLink link:definitionLink link:presentationLink 995485 - Disclosure - Note 3 - Inventories - Summary of Inventories (Details) link:calculationLink link:definitionLink link:presentationLink 995486 - Disclosure - Note 4 - Prepaid and Other Current Assets - Summary of Prepaid and Other Current Assets (Details) link:calculationLink link:definitionLink link:presentationLink 995487 - Disclosure - Note 5 - Leases (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995488 - Disclosure - Note 5 - Leases - Summary of Lease Costs (Details) link:calculationLink link:definitionLink link:presentationLink 995489 - Disclosure - Note 5 - Leases - Maturity of Operating Lease Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995490 - Disclosure - Note 6 - Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) link:calculationLink link:definitionLink link:presentationLink 995491 - Disclosure - Note 7 - Convertible Notes (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995492 - Disclosure - Note 8 - Interest Expense and Other - Schedule of Interest Expense and Other Nonoperating Expense (Details) link:calculationLink link:definitionLink link:presentationLink 995493 - Disclosure - Note 9 - Stockholders' Equity (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995494 - Disclosure - Note 10 - Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) link:calculationLink link:definitionLink link:presentationLink 995495 - Disclosure - Note 11 - Net Loss Per Share - Schedule of Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995496 - Disclosure - Note 11 - Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) link:calculationLink link:definitionLink link:presentationLink 995497 - Disclosure - Note 12 - Stock-based Compensation (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995498 - Disclosure - Note 12 - Stock-based Compensation - Schedule of Valuation Assumptions (Details) link:calculationLink link:definitionLink link:presentationLink 995499 - Disclosure - Note 12 - Stock-based Compensation - Allocation of Share-based Compensation Costs (Details) link:calculationLink link:definitionLink link:presentationLink 995500 - Disclosure - Note 12 - Stock-based Compensation - Allocation of Share-based Compensation Costs 2 (Details) link:calculationLink link:definitionLink link:presentationLink 995501 - Disclosure - Note 13 - Segment Information (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995502 - Disclosure - Note 14 - Revenue (Details Textual) link:calculationLink link:definitionLink link:presentationLink 995503 - Disclosure - Note 14 - Revenue - Disaggregation of Revenue (Details) link:calculationLink link:definitionLink link:presentationLink 995504 - Disclosure - Note 15 - Income Taxes (Details Textual) link:calculationLink link:definitionLink link:presentationLink