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Accounts Payable	6 Months Ended
	Dec. 31, 2011
Accounts Payable [Abstract] (Deprecated 2009-01-31)
Accounts Payable	6. Accounts Payable The accounts payable balance includes $58,000, and $43,000 of related party transactions for board of directors’ fees as of December 31, 2011 and June 30, 2011, respectively.

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- Definition

The disclosure of accounts payables of related party.

+ References

No definition available.

+ Details

Name:	LPTH_AccountsPayableTextBlock
Namespace Prefix:	LPTH_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_AccountsPayableAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration