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Derivative Instruments and Foreign Currency Exposure (Details Textual) (USD $)	3 Months Ended	6 Months Ended
	Jul. 31, 2013	Jul. 31, 2013
Foreign Currency Transaction Loss, before Tax	$ 360,269	$ 387,411
Foreign Currency Transaction Gain Loss Before Tax Price Per Share (in dollars per share)	$ 0.06	$ 0.07
Derivative Financial Instruments, Assets [Member] | Fiscal Year End 2014 [Member]
Other Assets	92,011	92,011
Derivative Financial Instruments, Assets [Member] | Fiscal Year End 2013 [Member]
Other Assets	$ 19,544	$ 19,544

X

- Definition

This element represents that, the percentage of the aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period.

+ References

No definition available.

+ Details

Name:	lake_ForeignCurrencyTransactionGainLossBeforeTaxPricePerShare
Namespace Prefix:	lake_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount before tax of foreign currency transaction realized and unrealized loss recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	duration

X

- Definition

The aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 7

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Balance Type:	debit
Period Type:	instant