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Property and Equipment - net (Details Narrative) (USD $) | 12 Months Ended
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Jun. 30, 2013 | Jun. 30, 2012
Property And Equipment - Net Details Narrative |  |
Manufacturing Equipment and Computer Equipment fully depreciated and written off as abandoned assets | $ 4,800 | $ 123,700
Disposals of tooling assets | $ 553,300 | $ 579,700

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- Details
Name: | LPTH_PropertyAndEquipmentNetDetailsNarrativeAbstract
Namespace Prefix: | LPTH_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Specific to property plant and equipment written off as abandoned assets during the period. + References No definition available. + Details
Name: | LPTH_PropertyPlantAndEquipmentAbandonmentWriteOff
Namespace Prefix: | LPTH_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentDisposals
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration