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Significant Components of Deferred Income Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Deferred income tax assets:    
Deferred rent expense $ 3,706 $ 4,028
Stock options 4,593 4,179
Inventory 1,190 1,298
Operating loss carry-forward 2,568 2,213
Accounts receivable allowances 463 217
Accrued compensation 944 867
Other 2,784 2,820
Total deferred income tax assets $ 16,248 $ 15,622