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Property and Equipment - net (Details Narrative) (USD $)	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Abstract]
Manufacturing Equipment and Computer Equipment fully depreciated and written off as abandoned assets	$ 0	$ 4,800
Disposals of tooling assets		$ 553,300

X

- 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

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Namespace Prefix:	lpth_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

X

- 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

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