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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
3 Months Ended
Jul. 30, 2016
Aug. 01, 2015
Revenue:    
Product sales $ 15,737 $ 26,639
Contract services 20,481 20,411
Total revenue 36,218 47,050
Cost of sales:    
Product sales 15,222 16,765
Contract services 14,313 14,262
Total cost of sales 29,535 31,027
Gross margin:    
Product sales 515 9,874
Contract services 6,168 6,149
Total gross margin 6,683 16,023
Selling, general and administrative 13,663 15,256
Research and development 8,600 9,831
Loss from operations (15,580) (9,064)
Other income (expense):    
Interest income, net 375 224
Other expense, net (300) (2,389)
Loss before income taxes (15,505) (11,229)
Benefit for income taxes (3,863) (4,248)
Net loss $ (11,642) $ (6,981)
Loss per share data:    
Basic (in dollars per share) $ (0.51) $ (0.30)
Diluted (in dollars per share) $ (0.51) $ (0.30)
Weighted average shares outstanding:    
Basic (in shares) 22,956,607 22,947,487
Diluted (in shares) 22,956,607 22,947,487