Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Schedule Of Income Taxes [Line Items]    
State tax net operating losses $ 94,900,000  
Foreign losses 2,400,000  
Federal income tax credits 1,400,000  
State income tax credits 3,700,000  
Valuation allowances 6,968,000 7,282,000
Period of uncertain tax positions as non-current income tax liabilities unless expected to be paid 1 year  
Penalties were accrued related to uncertain tax positions 0 0
Unrecognized tax benefit may be recognized within twelve months as a result of a settlement 400,000  
Maximum [Member]
    
Schedule Of Income Taxes [Line Items]    
State tax net operating losses expiration year 2033  
Federal income tax credits expiration year 2033  
State income tax credits expiration year 2029  
Accrued interest $ 100,000 $ 100,000
Minimum [Member]
    
Schedule Of Income Taxes [Line Items]    
State tax net operating losses expiration year 2013  
Federal income tax credits expiration year 2023  
State income tax credits expiration year 2013