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v2.4.0.6

Business (Details Textual) | 9 Months Ended
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Oct. 31, 2012 | Oct. 31, 2011
Entity Wide Revenue Major Customer Description | No customer accounted for more than 10% of net sales | No customer accounted for more than 10% of net sales

X
- Definition Description of entity wide revenue major customer resulted in more than 10% of net sales. + References No definition available. + Details
Name: | lake_EntityWideRevenueMajorCustomerDescription
Namespace Prefix: | lake_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration