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Income Tax Audit/Change in Accounting Estimate (Details Textual ) |  | 3 Months Ended
--- | --- | ---
Apr. 30, 2013 USD ($) | Apr. 30, 2013 China Tax Authority [Member] USD ($) | Apr. 30, 2013 China Tax Authority [Member] CNY | Apr. 30, 2013 Argentina Subsidiary [Member] China Tax Authority [Member] USD ($)
Deferred Tax Assets, Goodwill and Intangible Assets Net | $ 0 |  |  |
Deferred Tax Liability Maximum Additional Tax Liability |  | 16,000 | 100,000 |
Investment In Subsidiary For Tax Avoidance |  |  |  | $ 500,000

X
- Definition Amount net of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. + References No definition available. + Details
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Namespace Prefix: | lake_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of maximum additional tax liability under deferred tax liability. + References No definition available. + Details
Name: | lake_DeferredTaxLiabilityMaximumAdditionalTaxLiability
Namespace Prefix: | lake_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of investment in subsidiary for tax avoidance. + References No definition available. + Details
Name: | lake_InvestmentInSubsidiaryForTaxAvoidance
Namespace Prefix: | lake_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration