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SEGMENT INFORMATION (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Jan. 26, 2013
Jan. 28, 2012
Jan. 26, 2013
segment
Jan. 28, 2012
Segment Reporting [Abstract]        
Number of reportable segments     4  
Segment Reporting Information [Line Items]        
Income from litigation settlement $ 0 $ 0 $ 20,000 $ 0
Net sales 122,982 112,000 371,478 338,694
Transfers between segments 0 0 0 0
Net sales to unaffiliated customers 122,982 112,000 371,478 338,694
Income (loss) from operations 4,257 2,416 35,542 6,475
Interest (income)/expense, net 20 (164) 27 (160)
Other (income)/expense, net 114 615 609 767
Income/(loss) before income taxes 4,123 1,965 34,906 5,868
Automotive
        
Segment Reporting Information [Line Items]        
Income from litigation settlement 20,000   20,000  
Net sales 74,349 66,420 225,954 198,750
Transfers between segments (93) (543) (500) (2,652)
Net sales to unaffiliated customers 74,256 65,877 225,454 196,098
Income (loss) from operations 3,258 1,243 32,406 6,728
Interest (income)/expense, net (43) (210) (351) (369)
Other (income)/expense, net 490 (414) 595 (397)
Income/(loss) before income taxes 2,811 1,867 32,162 7,494
Interconnect
        
Segment Reporting Information [Line Items]        
Net sales 32,218 29,753 98,488 95,543
Transfers between segments (591) (480) (1,895) (2,360)
Net sales to unaffiliated customers 31,627 29,273 96,593 93,183
Income (loss) from operations 3,651 4,131 12,655 12,127
Interest (income)/expense, net (43) (70) (184) (49)
Other (income)/expense, net (377) 957 29 1,686
Income/(loss) before income taxes 4,071 3,244 12,810 10,490
Power Products
        
Segment Reporting Information [Line Items]        
Net sales 12,816 13,128 37,557 39,708
Transfers between segments (30) (86) (136) (142)
Net sales to unaffiliated customers 12,786 13,042 37,421 39,566
Income (loss) from operations 517 713 568 1,764
Interest (income)/expense, net 30 1 69 0
Other (income)/expense, net (12) (19) 11 113
Income/(loss) before income taxes 499 731 488 1,651
Other
        
Segment Reporting Information [Line Items]        
Net sales 4,276 3,866 12,022 10,037
Transfers between segments (33) (10) (72) (60)
Net sales to unaffiliated customers 4,243 3,856 11,950 9,977
Income (loss) from operations 1,124 541 2,672 (685)
Interest (income)/expense, net 0 0 0 0
Other (income)/expense, net 14 48 14 51
Income/(loss) before income taxes 1,110 493 2,658 (736)
Eliminations/Corporate
        
Segment Reporting Information [Line Items]        
Net sales (677) (1,167) (2,543) (5,344)
Transfers between segments 747 1,119 2,603 5,214
Net sales to unaffiliated customers 70 (48) 60 (130)
Income (loss) from operations (4,293) (4,212) (12,759) (13,459)
Interest (income)/expense, net 76 115 493 258
Other (income)/expense, net (1) 43 (40) (686)
Income/(loss) before income taxes $ (4,368) $ (4,370) $ (13,212) $ (13,031)