XML 63 R38.htm IDEA: XBRL DOCUMENT v2.4.1.9
Foreign Operations (Details Narrative) (USD $)
Mar. 31, 2015
Jun. 30, 2014
Shanghai Facility [Member]    
Assets in foreign locations $ 8,200,000lpth_ConcentrationRiskAssetsAmountGeographicArea
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
$ 7,580,000lpth_ConcentrationRiskAssetsAmountGeographicArea
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
Zhenjiang Facility [Member]    
Net assets in foreign locations $ 6,720,000us-gaap_ConcentrationRiskNetAssetsAmountGeographicArea
/ us-gaap_ConcentrationRiskByTypeAxis
= lpth_GeographicConcentrationRisk1Member
$ 6,280,000us-gaap_ConcentrationRiskNetAssetsAmountGeographicArea
/ us-gaap_ConcentrationRiskByTypeAxis
= lpth_GeographicConcentrationRisk1Member