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Deferred Revenue/Costs in Excess of Billings (Details Narrative) (USD $) | 12 Months Ended
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Jun. 30, 2012
Deferred Revenue Contract - Raytheon Vision Systems | $ 1,100,000
Total Contract - Raytheon Vision Systems | 13,400,000
Deferred Revenue Recognized | 612,000
Billed Revenues |
Deferred Revenue Recognized | 575,000
Accounts Receivable |
Deferred Revenue Recognized | 150,000
Unbilled Revenues |
Deferred Revenue Recognized | $ 41,000

X
- Definition The total value of the contract with Raytheon Vision Systems for which revenue is recognized on a percentage of completion basis. + References No definition available. + Details
Name: | LPTH_DeferredRevenueContract
Namespace Prefix: | LPTH_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The total value of the contract with Raytheon Vision Systems which has a deferred revenue purchase order/contract attached to it. + References No definition available. + Details
Name: | LPTH_RaytheonContract
Namespace Prefix: | LPTH_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
Name: | us-gaap_DeferredRevenueRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration