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Note 2 - Basis of Presentation and Significant Accounting Policies (Details Textual)	6 Months Ended
	Mar. 31, 2019
Number of Wholly Owned Subsidiaries	3
Number of Reportable Segments	2

X

- Definition

Represents the number of wholly owned subsidiaries of the reporting entity as of a certain date.

+ References

No definition available.

+ Details

Name:	lrad_NumberOfWhollyOwnedSubsidiaries
Namespace Prefix:	lrad_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration