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Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
May. 03, 2015
Apr. 27, 2014
Apr. 28, 2013
deferred tax assets:      
accounts receivable $ 444,000 $ 274,000  
inventories 2,251,000 1,801,000  
compensation 4,497,000 3,200,000  
liabilities and other 1,155,000 1,109,000  
alternative minimum tax credit 1,320,000 1,320,000  
property, plant and equipment [1] 447,000 572,000  
loss carryforwards - U.S. 12,133,000 17,161,000  
loss carryforwards - foreign 361,000 311,000  
unrecognized tax benefits - U.S. (10,349,000) (9,778,000)  
valuation allowances (922,000) (977,000)  
total deferred tax assets 11,337,000 14,993,000  
deferred tax liabilities:      
undistributed earnings on foreign subsidiaries (1,733,000) (1,993,000) $ (7,000,000)
property, plant and equipment [2] (4,022,000) (4,581,000)  
goodwill (1,197,000) (1,028,000)  
other (198,000) (134,000)  
total deferred tax liabilities (7,150,000) (7,736,000)  
Net deferred tax asset $ 4,187,000 $ 7,257,000  
[1] Pertains to the company's operations located in China.
[2] Pertains to the company's operations located in the U.S. and Canada.