Note 1 - Operations	12 Months Ended
Sep. 30, 2021
Notes to Financial Statements
Nature of Operations [Text Block]	1. OPERATIONS Genasys Inc. is a global provider of critical communications hardware and software solutions designed to alert, inform, and protect. The Company's unified platform receives information from a wide variety of sensors and Internet-of-Things (IoT) inputs to collect real-time information on developing and active emergency situations. The Company uses this information to create and disseminate alerts, warnings, notifications, and instructions through multiple channels before, during, and after public safety and enterprise threats, critical events, and other crisis situations.

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e5967-108592

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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