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Note 6 - Property And Equipment (Details) - Property and Equipment, depreciation expense (USD $) | 12 Months Ended
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Sep. 30, 2013 | Sep. 30, 2012
Property and Equipment, depreciation expense [Abstract] |  |
Depreciation expense | $ 122,990 | $ 64,409

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- Details
Name: | lrad_PropertyAndEquipmentDepreciationExpenseAbstract
Namespace Prefix: | lrad_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_Depreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration