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Note 2 - Basis of Presentation and Significant Accounting Policies (Details Textual) | Mar. 31, 2018
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Number of Wholly Owned Subsidiaries | 4
Number of Additional Inactive Subsidiaries | 2

X
- Definition Represents the number of additional inactive subsidiaries of the reporting entity, as of a certain date. + References No definition available. + Details
Name: | lrad_NumberOfAdditionalInactiveSubsidiaries
Namespace Prefix: | lrad_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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