Major Customers (Details)	3 Months Ended	6 Months Ended
Mar. 31, 2013 customers	Mar. 31, 2012 customers	Mar. 31, 2013 customers	Mar. 31, 2012 customers
Major Customers (Textual) [Abstract]
Number of customers, recorded more than 10% of revenues	3	2	2	2
Minimum percentage of revenue require to be disclosed as major customer			10.00%	10.00%
Number of customers, recorded more than 10% of account receivables			4	2
Minimum percentage of receivable require to be disclosed as major customer			10.00%	10.00%
Customer 1 [Member]
Revenue, Major Customer [Line Items]
Revenues from customers	20.00%	22.00%	24.00%	14.00%
Receivables from customers	34.00%	46.00%	34.00%	46.00%
Customer 2 [Member]
Revenue, Major Customer [Line Items]
Revenues from customers	15.00%	10.00%	11.00%	16.00%
Receivables from customers	14.00%	11.00%	14.00%	11.00%
Customer 3 [Member]
Revenue, Major Customer [Line Items]
Revenues from customers	14.00%
Receivables from customers	12.00%		12.00%
Customer 4 [Member]
Revenue, Major Customer [Line Items]
Receivables from customers	10.00%		10.00%

Entity wide accounts receivable major customer percentage.

No definition available.

Name:	lrad_EntityWideAccountsReceivableMajorCustomerPercentage
Namespace Prefix:	lrad_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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

Minimum percentage of accounts receivable require to be disclosed as major customer.

No definition available.

Name:	lrad_MinimumPercentageOfAccountsReceivableRequireToBeDisclosedAsMajorCustomer
Namespace Prefix:	lrad_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Minimum percentage of revenue require to be disclosed as major customer.

No definition available.

Name:	lrad_MinimumPercentageOfRevenueRequireToBeDisclosedAsMajorCustomer
Namespace Prefix:	lrad_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Number of customers attaining specified percentage of Accounts receivable.

No definition available.

Name:	lrad_NumberOfCustomersAttainingSpecifiedPercentageOfAccountsReceivable
Namespace Prefix:	lrad_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of customers attaining specified percentage of revenue.

No definition available.

Name:	lrad_NumberOfCustomersAttainingSpecifiedPercentageOfRevenue
Namespace Prefix:	lrad_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_EntityWideRevenueMajorCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

No definition available.

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration