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Document And Entity Information - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2024 | Dec. 04, 2024 | Mar. 29, 2024
Document Information [Line Items] |  |  |
Document Type | 10-K |  |
Document Annual Report | true |  |
Document Period End Date | Sep. 30, 2024 |  |
Document Transition Report | false |  |
Entity File Number | 0-24248 |  |
Entity Registrant Name | GENASYS INC. |  |
Entity Incorporation, State or Country Code | DE |  |
Entity Tax Identification Number | 87-0361799 |  |
Entity Address, Address Line One | 16262 West Bernardo Drive, |  |
Entity Address, City or Town | San Diego |  |
Entity Address, State or Province | CA |  |
Entity Address, Postal Zip Code | 92127 |  |
City Area Code | 858 |  |
Local Phone Number | 676-1112 |  |
Title of 12(b) Security | Common stock, $0.00001 par value per share |  |
Trading Symbol | GNSS |  |
Security Exchange Name | NASDAQ |  |
Entity Well-known Seasoned Issuer | No |  |
Entity Voluntary Filers | No |  |
Entity Current Reporting Status | Yes |  |
Entity Interactive Data Current | Yes |  |
Entity Small Business | true |  |
Entity Filer Category | Non-accelerated Filer |  |
Entity Emerging Growth Company | false |  |
ICFR Auditor Attestation Flag | false |  |
Document Financial Statement Error Correction [Flag] | false |  |
Entity Shell Company | false |  |
Entity Public Float |  |  | $ 88.8
Entity Common Stock, Shares Outstanding (in shares) |  | 44,928,967 |
Auditor Firm ID | 23 |  |
Auditor Name | BAKER TILLY US, LLP |  |
Auditor Location | Chicago, Illinois |  |
Entity Central Index Key | 0000924383 |  |
Current Fiscal Year End Date | --09-30 |  |
Document Fiscal Year Focus | 2024 |  |
Document Fiscal Period Focus | FY |  |
Amendment Flag | false |  |
Documents Incorporated by Reference [Text Block] | Portions of the registrant’s definitive proxy statement filed with the Commission pursuant to Regulation 14A in connection with the registrant’s 2025 Annual Meeting of Stockholders, to be filed subsequent to the date of this report, are incorporated by reference into Part III of this report. The definitive proxy statement will be filed with the Commission not later than 120 days after the conclusion of the registrant’s fiscal year ended September 30, 2024. |  |
Auditor Opinion | Opinion on the Financial Statements We have audited the accompanying consolidated balance sheets of Genasys Inc. (the “Company”) as of September 30, 2024 and 2023, the related consolidated statements of operations, comprehensive loss, stockholders’ equity, and cash flows, for each of the two years in the period ended September 30, 2024, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of September 30, 2024 and 2023, and the results of its operations and its cash flows for each of the two years in the period ended September 30, 2024, in conformity with accounting principles generally accepted in the United States of America. |  |

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