XML 78 R34.htm IDEA: XBRL DOCUMENT
v3.20.2

Foreign Operations (Tables) | 12 Months Ended
--- | ---
Jun. 30, 2020
Foreign Currency [Abstract] |
Assets and net assets in foreign countries |
|  | China |  | Latvia
|  | June 30, 2020 |  | June 30, 2019 |  | June 30, 2020 |  | June 30, 2019
Assets |  | $19.0 million |  | $16.9 million |  | $9.8 million |  | $8.2 million
Net assets |  | $16.2 million |  | $14.5 million |  | $8.2 million |  | $7.8 million

X
- References No definition available. + Details
Name: | LPTH_ScheduleOfAssetForeignTableTextBlock
Namespace Prefix: | LPTH_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ForeignCurrencyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration