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Accrued liabilities and other liabilities noncurrent (Details Textual) (USD $)	Jun. 30, 2012	Sep. 30, 2011
Accrued Liabilities and Other Liabilities-Noncurrent (Textual) [Abstract]
Deferred Revenue	$ 270,559	$ 270,941
Customer prepayments	$ 23,301	$ 0

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- Details

Name:	lrad_AccruedLiabilitiesAndOtherLiabilitiesNoncurrentTextualAbstract
Namespace Prefix:	lrad_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Deferred revenue from license agreement.

+ References

No definition available.

+ Details

Name:	lrad_DeferredRevenueFromLicenseAgreement
Namespace Prefix:	lrad_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

Proportion of prepayment to customers from deferred revenue.

+ References

No definition available.

+ Details

Name:	lrad_ProportionOfPrepaymentToCustomersFromDeferredRevenue
Namespace Prefix:	lrad_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant