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Note 13 - Major Customers (Details) (Customer Concentration Risk [Member]) | 3 Months Ended
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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 | 3 lrad_NumberOfCustomersAttainingSpecifiedPercentageOfRevenue / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 1 lrad_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 | 2 lrad_NumberOfCustomersAttainingSpecifiedPercentageOfAccountsReceivable / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 4 lrad_NumberOfCustomersAttainingSpecifiedPercentageOfAccountsReceivable / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember

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- Definition Minimum percentage of accounts receivable require to be disclosed as major customer. + References No definition available. + Details
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- Definition Number of customers attaining specified percentage of Accounts receivable. + References No definition available. + Details
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- Definition Number of customers attaining specified percentage of revenue. + References No definition available. + Details
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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 + Details
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- Details
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- Details
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- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
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