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Income taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 01, 2014
Mar. 02, 2013
Operating loss carryovers    
Undistributed foreign earnings that have been indefinitely reinvested $ 41,071 $ 36,850
Provision for taxes due upon remittance of foreign earnings 0 0
Foreign and state
   
Operating loss carryovers    
Deferred tax assets for net operating loss carryovers 2,512 2,171
Valuation allowances $ 2,021 $ 1,519