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Note 1 - Operations	9 Months Ended
Note 1 - Operations	Jun. 30, 2019
Notes to Financial Statements
Nature of Operations [Text Block]	1. OPERATIONS LRAD ® Corporation, a Delaware corporation (the “Company”), is engaged in the design, development and commercialization of directed and multidirectional sound technologies, voice broadcast products, and location-based public safety mass messaging solutions for emergency warning and workforce management. The principal markets for the Company’s proprietary sound reproduction technologies, voice broadcast products and mass messaging solutions are in North and South America, Europe, Middle East and Asia.