Note 15 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Sep. 28, 2019
Operating Lease, Right-of-Use Asset	$ 1,838	$ 0
Accrued expenses	942	0
Other liabilities	883	$ 0
Total operating lease liabilities	1,825
Other Noncurrent Assets [Member]
Operating Lease, Right-of-Use Asset	1,838
Accrued Expenses, Current [Member]
Accrued expenses	942
Other Noncurrent Liabilities [Member]
Other liabilities	$ 883