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Inventories (Details Narrative) - USD ($)	Sep. 30, 2022	Jun. 30, 2022
Raw materials	$ 2,788,577	$ 3,019,156
Inventory - Tooling
Raw materials	$ 1,500,000	$ 1,600,000

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://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a)(4))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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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: