Name:	LPTH_OwnershipUnitsIntendedForSale
Namespace Prefix:	LPTH_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of prepaid offering costs written off during the period and included in selling, general and administrative costs. These costs were originally recorded in conjunction with an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012.

No definition available.

Name:	LPTH_PrepaidOfferingCostsWrittenOff
Namespace Prefix:	LPTH_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The number of shares of common stock included in each ownership units registered for sale in an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012.

No definition available.

Name:	LPTH_StockIncludedInEachOwnershipUnit
Namespace Prefix:	LPTH_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The number of warrants to purchase shares of common stock included in each ownership units registered for sale in an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012.

No definition available.

Name:	LPTH_WarrantsIncludedInEachOwnershipUnit
Namespace Prefix:	LPTH_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

No definition available.