v2.4.0.6
Restructuring (Details) (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 30, 2012
Mar. 30, 2012
Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]      
Number of positions eliminated     55
Balance at September 30, 2011   $ 2,370,000  
Restructuring charges   1,278,000  
Cash payments   (2,620,000)  
Non-cash charges   (326,000)  
Balance at March 30, 2012 702,000 702,000 2,370,000
Severance [Member]
      
Restructuring Cost and Reserve [Line Items]      
Recorded severance and other associated costs   400,000 2,500,000
Balance at September 30, 2011   2,250,000  
Restructuring charges   318,000  
Cash payments   (2,435,000)  
Non-cash charges   5,000  
Balance at March 30, 2012 138,000 138,000 2,250,000
Facilities And Contract Termination Costs [Member]
      
Restructuring Cost and Reserve [Line Items]      
Recorded severance and other associated costs   400,000  
Balance at September 30, 2011   0  
Restructuring charges   432,000  
Cash payments   0  
Non-cash charges   93,000  
Balance at March 30, 2012 525,000 525,000  
Fixed Assets Write-Off [Member]
      
Restructuring Cost and Reserve [Line Items]      
Recorded severance and other associated costs 400,000   200,000
Balance at September 30, 2011   0  
Restructuring charges   424,000  
Cash payments   0  
Non-cash charges   (424,000)  
Balance at March 30, 2012 0 0 0
Other Associated Costs [Member]
      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges   200,000  
Balance at September 30, 2011   120,000  
Restructuring charges   104,000  
Cash payments   (185,000)  
Non-cash charges   0  
Balance at March 30, 2012 $ 39,000 $ 39,000