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Business Combinations (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Jan. 01, 2012
Dec. 30, 2012
Jan. 01, 2012
Jul. 19, 2012
NXP B.V [Member]
Apr. 30, 2012
Fox Enterprise [Member]
Apr. 16, 2012
Alvand Technologies [Member]
Jul. 19, 2012
Developed Technology Rights [Member]
NXP B.V [Member]
Apr. 30, 2012
Developed Technology Rights [Member]
Fox Enterprise [Member]
Jul. 19, 2012
Noncompete Agreements [Member]
NXP B.V [Member]
Apr. 16, 2012
Noncompete Agreements [Member]
Alvand Technologies [Member]
Jul. 19, 2012
Customer Relationships [Member]
NXP B.V [Member]
Apr. 30, 2012
Customer Relationships [Member]
Fox Enterprise [Member]
Jul. 19, 2012
In Process Research and Development [Member]
NXP B.V [Member]
Apr. 30, 2012
In Process Research and Development [Member]
Fox Enterprise [Member]
Business Acquisition                            
Business Acquisition, Pro Forma Revenue $ 120,614 $ 379,110 $ 409,219                      
Acquired Finite-lived Intangible Asset, Amount             7,500 7,900     2,700 2,000 1,900 900
Purchase price allocation                            
Cash         1,080 147                
Accounts receivable       4,000 4,053 211                
Inventories       252 2,600                  
Prepaid expenses and other current assets         363 124                
Property, plant and equipment, net       1,125 656 15                
Defined Benefit Plan, Assets for Plan Benefits       666 [1]                    
Other long term assets         1,190                  
Defined Benefit Plan, Benefit Obligation   (700)   (666) [1]                    
Accounts payable and accrued expenses         (3,765) (707)                
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities       (435) (1,516)                  
Long term deferred tax liability         (4,345)                  
Amortizable intangible assets       12,500 12,300       300          
Goodwill       13,720 16,305 19,712                
Finite-Lived Noncompete Agreements, Gross                   2,300        
Total purchase price       27,162 28,921 23,302                
Business Acquisition, Pro Forma Net Income (Loss) $ (6,854) $ (9,363) $ (139)                      
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic $ (0.05) $ (0.07) $ 0.00                      
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted $ (0.05) $ (0.07) $ 0.00                      
[1] See Note 15 for information regarding pension plans adopted.