3.19.1 html 167 263 1 false 60 0 false 4 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.avinger.com/20190331/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Condensed Balance Sheets (Current Period Unaudited) Sheet http://www.avinger.com/20190331/role/statement-condensed-balance-sheets-current-period-unaudited- Condensed Balance Sheets (Current Period Unaudited) Statements 2 false false R3.htm 002 - Statement - Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) Sheet http://www.avinger.com/20190331/role/statement-condensed-balance-sheets-current-period-unaudited-parentheticals Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Condensed Statements of Operations and Comprehensive Loss (Unaudited) Sheet http://www.avinger.com/20190331/role/statement-condensed-statements-of-operations-and-comprehensive-loss-unaudited Condensed Statements of Operations and Comprehensive Loss (Unaudited) Statements 4 false false R5.htm 004 - Statement - Condensed Statements of Stockholders' Equity (Unaudited) Sheet http://www.avinger.com/20190331/role/statement-condensed-statements-of-stockholders-equity-unaudited Condensed Statements of Stockholders' Equity (Unaudited) Statements 5 false false R6.htm 005 - Statement - Condensed Statements of Cash Flows (Unaudited) Sheet http://www.avinger.com/20190331/role/statement-condensed-statements-of-cash-flows-unaudited Condensed Statements of Cash Flows (Unaudited) Statements 6 false false R7.htm 006 - Disclosure - Note 1 - Organization Sheet http://www.avinger.com/20190331/role/statement-note-1-organization- Note 1 - Organization Notes 7 false false R8.htm 007 - Disclosure - Note 2 - Summary of Significant Accounting Policies Sheet http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies Note 2 - Summary of Significant Accounting Policies Notes 8 false false R9.htm 008 - Disclosure - Note 3 - Fair Value Measurements Sheet http://www.avinger.com/20190331/role/statement-note-3-fair-value-measurements Note 3 - Fair Value Measurements Notes 9 false false R10.htm 009 - Disclosure - Note 4 - Inventories Sheet http://www.avinger.com/20190331/role/statement-note-4-inventories- Note 4 - Inventories Notes 10 false false R11.htm 010 - Disclosure - Note 5 - Borrowings Sheet http://www.avinger.com/20190331/role/statement-note-5-borrowings Note 5 - Borrowings Notes 11 false false R12.htm 011 - Disclosure - Note 6 - Commitments and Contingencies Sheet http://www.avinger.com/20190331/role/statement-note-6-commitments-and-contingencies Note 6 - Commitments and Contingencies Notes 12 false false R13.htm 012 - Disclosure - Note 7 - Stockholders' Equity (Deficit) Sheet http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit Note 7 - Stockholders' Equity (Deficit) Notes 13 false false R14.htm 013 - Disclosure - Note 8 - Stock-based Compensation Sheet http://www.avinger.com/20190331/role/statement-note-8-stockbased-compensation Note 8 - Stock-based Compensation Notes 14 false false R15.htm 014 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.avinger.com/20190331/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies 15 false false R16.htm 015 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables) Sheet http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies-tables Note 2 - Summary of Significant Accounting Policies (Tables) Tables http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies 16 false false R17.htm 016 - Disclosure - Note 4 - Inventories (Tables) Sheet http://www.avinger.com/20190331/role/statement-note-4-inventories-tables Note 4 - Inventories (Tables) Tables http://www.avinger.com/20190331/role/statement-note-4-inventories- 17 false false R18.htm 017 - Disclosure - Note 5 - Borrowings (Tables) Sheet http://www.avinger.com/20190331/role/statement-note-5-borrowings-tables Note 5 - Borrowings (Tables) Tables http://www.avinger.com/20190331/role/statement-note-5-borrowings 18 false false R19.htm 018 - Disclosure - Note 7 - Stockholders' Equity (Deficit) (Tables) Sheet http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-tables Note 7 - Stockholders' Equity (Deficit) (Tables) Tables http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit 19 false false R20.htm 019 - Disclosure - Note 8 - Stock-based Compensation (Tables) Sheet http://www.avinger.com/20190331/role/statement-note-8-stockbased-compensation-tables Note 8 - Stock-based Compensation (Tables) Tables http://www.avinger.com/20190331/role/statement-note-8-stockbased-compensation 20 false false R21.htm 020 - Disclosure - Note 1 - Organization (Details Textual) Sheet http://www.avinger.com/20190331/role/statement-note-1-organization-details-textual Note 1 - Organization (Details Textual) Details http://www.avinger.com/20190331/role/statement-note-1-organization- 21 false false R22.htm 021 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual) Sheet http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies-details-textual Note 2 - Summary of Significant Accounting Policies (Details Textual) Details http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies-tables 22 false false R23.htm 022 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Product Warranty (Details) Sheet http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies-product-warranty-details Note 2 - Summary of Significant Accounting Policies - Product Warranty (Details) Details 23 false false R24.htm 023 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Net Loss Per Share Attributable to Common Stockholders (Details) Sheet http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies-net-loss-per-share-attributable-to-common-stockholders-details Note 2 - Summary of Significant Accounting Policies - Net Loss Per Share Attributable to Common Stockholders (Details) Details 24 false false R25.htm 024 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Antidilutive Securities (Details) Sheet http://www.avinger.com/20190331/role/statement-note-2-summary-of-significant-accounting-policies-antidilutive-securities-details Note 2 - Summary of Significant Accounting Policies - Antidilutive Securities (Details) Details 25 false false R26.htm 025 - Disclosure - Note 3 - Fair Value Measurements (Details Textual) Sheet http://www.avinger.com/20190331/role/statement-note-3-fair-value-measurements-details-textual Note 3 - Fair Value Measurements (Details Textual) Details http://www.avinger.com/20190331/role/statement-note-3-fair-value-measurements 26 false false R27.htm 026 - Disclosure - Note 4 - Inventories - Schedule of Inventories (Details) Sheet http://www.avinger.com/20190331/role/statement-note-4-inventories-schedule-of-inventories-details Note 4 - Inventories - Schedule of Inventories (Details) Details 27 false false R28.htm 027 - Disclosure - Note 5 - Borrowings (Details Textual) Sheet http://www.avinger.com/20190331/role/statement-note-5-borrowings-details-textual Note 5 - Borrowings (Details Textual) Details http://www.avinger.com/20190331/role/statement-note-5-borrowings-tables 28 false false R29.htm 028 - Disclosure - Note 5 - Borrowings - Schedule of Debt (Details) Sheet http://www.avinger.com/20190331/role/statement-note-5-borrowings-schedule-of-debt-details Note 5 - Borrowings - Schedule of Debt (Details) Details 29 false false R30.htm 029 - Disclosure - Note 6 - Commitments and Contingencies (Details Textual) Sheet http://www.avinger.com/20190331/role/statement-note-6-commitments-and-contingencies-details-textual Note 6 - Commitments and Contingencies (Details Textual) Details http://www.avinger.com/20190331/role/statement-note-6-commitments-and-contingencies 30 false false R31.htm 030 - Disclosure - Note 7 - Stockholders' Equity (Deficit) (Details Textual) Sheet http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-details-textual Note 7 - Stockholders' Equity (Deficit) (Details Textual) Details http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-tables 31 false false R32.htm 031 - Disclosure - Note 7 - Stockholders' Equity (Deficit) - Assumptions Used to Estimate Fair Value (Details) Sheet http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-assumptions-used-to-estimate-fair-value-details Note 7 - Stockholders' Equity (Deficit) - Assumptions Used to Estimate Fair Value (Details) Details http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-tables 32 false false R33.htm 032 - Disclosure - Note 7 - Stockholders' Equity (Deficit) - Stock Option Activity (Details) Sheet http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-stock-option-activity-details Note 7 - Stockholders' Equity (Deficit) - Stock Option Activity (Details) Details http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-tables 33 false false R34.htm 033 - Disclosure - Note 7 - Stockholders' Equity (Deficit) - Restricted Stock Units Award Activity (Details) Sheet http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-restricted-stock-units-award-activity-details Note 7 - Stockholders' Equity (Deficit) - Restricted Stock Units Award Activity (Details) Details http://www.avinger.com/20190331/role/statement-note-7-stockholders-equity-deficit-tables 34 false false R35.htm 034 - Disclosure - Note 8 - Stock-based Compensation - Noncash Stock-based Compensation Expense Related to Stock Options, ESPP, and RSUs (Details) Sheet http://www.avinger.com/20190331/role/statement-note-8-stockbased-compensation-noncash-stockbased-compensation-expense-related-to-stock-options-espp-and-rsus-details Note 8 - Stock-based Compensation - Noncash Stock-based Compensation Expense Related to Stock Options, ESPP, and RSUs (Details) Details 35 false false All Reports Book All Reports avgr-20190331.xml avgr-20190331.xsd avgr-20190331_cal.xml avgr-20190331_def.xml avgr-20190331_lab.xml avgr-20190331_pre.xml http://fasb.org/srt/2019-01-31 http://xbrl.sec.gov/dei/2018-01-31 http://xbrl.sec.gov/country/2017-01-31 http://fasb.org/us-gaap/2019-01-31 true true