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CONSOLIDATED STATEMENTS OF OPERATIONS [Parenthetical] (USD $) | 12 Months Ended
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Jan. 31, 2013 | Jan. 31, 2012
Disposal Group Including Discontinued Operation Shutdown Expenses Accrual | $ 800,000 | $ 1,734,000

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- Definition Amount of operating expenses accrual or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References No definition available. + Details
Name: | lake_DisposalGroupIncludingDiscontinuedOperationShutdownExpensesAccrual
Namespace Prefix: | lake_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration