XML 48 R34.htm IDEA: XBRL DOCUMENT
v3.22.1

Inventories (Details Narrative) - USD ($) | Mar. 31, 2022 | Jun. 30, 2021
--- | --- | ---
Raw Materials | $ 3,305,164 | $ 3,908,630
Inventory - Tooling |  |
Raw Materials | $ 1,700,000 | $ 2,000,000.0

X
- Definition Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_InventoryRawMaterials
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=lpth_ToolingRawMaterialsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |