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Major Supplier (Details Textual)	3 Months Ended
	Apr. 30, 2013
Entity Wide Purchases Major Supplier Percentage	5.00%

X

- Definition

Percentage of purchases from a single external supplier that accounts for 10 percent or more of an entity's purchases.

+ References

No definition available.

+ Details

Name:	lake_EntityWidePurchasesMajorSupplierPercentage
Namespace Prefix:	lake_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration