Major Supplier (Details Textual)	6 Months Ended
Jul. 31, 2012
Percentage Of Cost Of Goods Sold Purchased From Major Suppliers	11.90%
Percentage Of Cost Of Goods Sold Not Excess Purchased From Major Suppliers	10.00%

This element represents that, percentage of cost of goods sold not excess purchased from major suppliers.

No definition available.

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