Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans (Details)

v3.8.0.1
Employee Benefit Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Retirement Benefits [Abstract]      
Contributions to 401(k) Plan $ 900 $ 1,100 $ 1,100
Discount rate used in determining the liability 6.00% 6.00%  
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Balance at beginning of year $ 344 $ 412  
Interest expense 5 6  
Benefits paid (6) (81)  
Actuarial adjustment 0 7  
Balance at end of year $ 343 $ 344 $ 412