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Defined Contribution Plan (Details Narrative) | 12 Months Ended
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Jun. 30, 2014
Defined Contribution Plan Details Narrative |
Company's matching contribution percentage | 25.00%
Company's matching percentage, percent of gross pay | 6.00%

X
- Details
Name: | lpth_DefinedContributionPlanDetailsNarrativeAbstract
Namespace Prefix: | lpth_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration