Debt Financing  | 
6 Months Ended | |||||||||
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Apr. 01, 2018  | ||||||||||
| Debt Disclosure [Abstract] | ||||||||||
| Debt Financing | 
 Note 5 - Debt Financing 
 Credit Facility — Avidbank 
 As of April 1, 2018 and October 1, 2017, the outstanding principal balance on the line of credit was $300 thousand. For the three months and six months ended April 1, 2018 and April 2, 2017, the total interest expense against the outstanding line of credit balance was $9 and $12 thousand and $6 and $10 thousand. 
 The Company amended its revolving credit facility with Avidbank pursuant to a Seventh Amendment to Amended and Restated Loan Agreement, dated as of April 5, 2018. The substantive amendments are as follows: 
 
 
 
 
 
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