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Compensatory Equity Incentive Plan and Other Equity Incentives (Details)	Jun. 30, 2015 shares
Award shares, authorized	4,315,625
Award shares, outstanding	1,797,783
Available for issuance	1,878,778
Amended and Restated Omnibus Incentive Plan [Member]
Award shares, authorized	3,915,625
Award shares, outstanding	1,797,783
Available for issuance	1,478,778
Employee Stock Purchase Plan [Member]
Award shares, authorized	400,000
Available for issuance	400,000

X

- Definition

The number of shares pertaining to the outstanding awards as of the balance sheet.

+ References

No definition available.

+ Details

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Namespace Prefix:	lpth_
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Balance Type:	na
Period Type:	instant

X

- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (a)(3)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Details

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Namespace Prefix:
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X

- Details

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