Document And Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2019	Dec. 06, 2019	Mar. 31, 2019
Document Information [Line Items]
Entity Registrant Name	LRAD Corp
Entity Central Index Key	0000924383
Trading Symbol	lrad
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding (in shares)		33,008,330
Entity Public Float			$ 66,567,675
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Title of 12(b) Security	Common Stock