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Note 9 - Commitments and Contingencies (Details Textual) - USD ($)	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Level 1 [Member]
Payment of Bonus as Percentage	50.00%
Level 2 [Member]
Payment of Bonus as Percentage	100.00%
Level 3 [Member]
Payment of Bonus as Percentage	200.00%
Bonuses and Related Payroll Tax Expense [Member]
Increase (Decrease) in Other Employee-Related Liabilities	$ 0	$ 323,098
Target Bonus Amounts of Percentage of Employee Base Salary, Minimum	10.00%
Target Bonus Amounts of Percentage of Employee Base Salary Maximum	50.00%

X

- Definition

Represents the payment of bonus as percentage.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the target bonus amounts of percentage of employee base salary maximum.

+ References

No definition available.

+ Details

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

X

- Definition

Represents the target bonus amounts of percentage of employee base salary minimum.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of increase (decrease) in employer-related costs classified as other and current.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=lrad_Level2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=lrad_Level3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_NatureOfExpenseAxis=lrad_BonusesAndRelatedPayrollTaxExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: