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MAJOR SUPPLIER (Details Textual) (Dupount [Member]) | 12 Months Ended
--- | ---
Jan. 31, 2013 | Jan. 31, 2012
Dupount [Member] |  |
Entity Wide Purchases Major Supplier Percentage | 11.70% | 13.90%

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