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Significant Accounting Policies (Details Narrative) (USD $) | 3 Months Ended
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Sep. 30, 2014
Raytheon Vision Systems [Member] |
Gross contract amount | $ 1,100,000
Lower Range [Member] |
Vesting period of options and RSUs | 2 years
Upper Range [Member] |
Vesting period of options and RSUs | 4 years
Property and Equipment [Member] | Lower Range [Member] |
Estimated Life (Years) | 3 years
Property and Equipment [Member] | Upper Range [Member] |
Estimated Life (Years) | 10 years

X
- Definition The amount of the contract with Raytheon Vision Systems for which revenue is recognized on a percentage of completion basis. + References No definition available. + Details
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Namespace Prefix: | lpth_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration