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Income Taxes (Details Narrative) (USD $) | 12 Months Ended
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Jun. 30, 2013
Income Taxes Details Narrative |
Estimated income necessary to fully realize the deferred tax asset | $ 93,500,000
Change in deferred tax assets valuation allowance | $ (1,566,000)

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- Definition The estimated amount of future taxable income that must be generated in order to fully realize the deferred tax asset as of the balance sheet date. + References No definition available. + Details
Name: | LPTH_FutureIncomeNecessaryToFullyRealizeDeferredTaxAsset
Namespace Prefix: | LPTH_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition The amount of the change in the period in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e32123-109318 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration