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Note 13 - Major Customers (Details) (Customer Concentration Risk [Member])	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Customer 2 [Member] | Sales Revenue, Net [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	15.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer2Member
Customer 2 [Member] | Accounts Receivable [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	24.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer2Member	19.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer2Member
Customer 3 [Member] | Sales Revenue, Net [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	13.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer3Member
Customer 3 [Member] | Accounts Receivable [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage		11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer3Member
Customer 1 [Member] | Sales Revenue, Net [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage		11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer1Member
Customer 1 [Member] | Accounts Receivable [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	38.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer1Member	31.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = lrad_Customer1Member
Customer 1 [Member] | Sales Revenue, Net [Member]
Note 13 - Major Customers (Details) [Line Items]
Concentration Risk, Percentage	23.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / lrad_MajorCustomerAxis = lrad_Customer1Member
Customer 4 [Member] | Accounts Receivable [Member]
Note 13 - Major Customers (Details) [Line Items]
Minimum percentage of accounts receivable required to be disclosed as major customer		10.00%lrad_MinimumPercentageOfAccountsReceivableRequireToBeDisclosedAsMajorCustomer / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / lrad_MajorCustomerAxis = lrad_Customer4Member
Sales Revenue, Net [Member]
Note 13 - Major Customers (Details) [Line Items]
Number of customers, recorded more than 10% of revenue	3lrad_NumberOfCustomersAttainingSpecifiedPercentageOfRevenue / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	1lrad_NumberOfCustomersAttainingSpecifiedPercentageOfRevenue / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember
Accounts Receivable [Member]
Note 13 - Major Customers (Details) [Line Items]
Number of customers, recorded more than 10% of accounts receivable	2lrad_NumberOfCustomersAttainingSpecifiedPercentageOfAccountsReceivable / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	4lrad_NumberOfCustomersAttainingSpecifiedPercentageOfAccountsReceivable / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember

X

- Definition

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

+ References

No definition available.

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- Definition

Number of customers attaining specified percentage of Accounts receivable.

+ References

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- Definition

Number of customers attaining specified percentage of revenue.

+ References

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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