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Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 27, 2014
Apr. 28, 2013
deferred tax assets:    
accounts receivable $ 274 $ 376
inventories 1,801 1,689
compensation 3,200 3,049
liabilities and other 1,109 700
alternative minimum tax credit 1,320 1,320
property, plant and equipment 572 [1] 758 [1]
loss carryforwards - U.S. 17,161 19,842
loss carryforwards - foreign 311 241
unrecognized tax benefits - U.S. (9,778) (8,976)
valuation allowances (977) (963)
total deferred tax assets 14,993 18,036
deferred tax liabilities:    
undistributed earnings on foreign subsidiaries (1,993) (7,011)
property, plant and equipment (4,581) [2] (4,653) [2]
goodwill (1,028) (849)
other (134) (136)
total deferred tax liabilities (7,736) (12,649)
Net deferred tax asset $ 7,257 $ 5,387
[1] Pertains to the company's operations located in China.
[2] Pertains to the company's operations located in the U.S. and Canada.