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Withdrawn Financing Plan (Details Narrative) (USD $) | 0 Months Ended | 3 Months Ended
--- | --- | ---
Sep. 29, 2011 Integer | Mar. 31, 2012
Ownership units intended for sale | 4,500,000 |
Stock included in each ownership unit | 1 |
Prepaid offering costs written off |  | $ 227,000
Warrant Class A |  |
Warrants included in each ownership unit | 1 |
Number of shares callable by warrant | 0.25 |
Warrant Class B |  |
Warrants included in each ownership unit | 1 |
Number of shares callable by warrant | 0.25 |

X
- Definition The number of ownership units registered for sale in an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012. + References No definition available. + Details
Name: | LPTH_OwnershipUnitsIntendedForSale
Namespace Prefix: | LPTH_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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recorded in conjunction with an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012. + References No definition available. + Details
Name: | LPTH_PrepaidOfferingCostsWrittenOff
Namespace Prefix: | LPTH_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition 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units registered for sale in an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012. + References No definition available. + Details
Name: | LPTH_StockIncludedInEachOwnershipUnit
Namespace Prefix: | LPTH_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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units registered for sale in an S-1 Registration statement filed on September 29, 2011, which was subsequently withdrawn on January 27, 2012. + References No definition available. + Details
Name: | LPTH_WarrantsIncludedInEachOwnershipUnit
Namespace Prefix: | LPTH_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant