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Significant Components of Deferred Income Tax Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Deferred income tax assets:    
Deferred rent expense $ 4,407 $ 3,038
Translation adjustment 1,116 2,205
Stock options 3,660 2,743
Inventory 1,381 1,624
Operating loss carry-forward 1,797 2,120
Accounts receivable allowances 106 270
Accrued compensation 669 580
Other 1,915 674
Total deferred income tax assets $ 15,051 $ 13,254