Note 7 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 26, 2021	Sep. 27, 2020
Operating lease costs	$ 14,846	$ 10,148
Variable lease costs	92	1,911
Short-term lease costs	0	426
Total Operating Lease Expense	14,938	12,485
Operating cash outflow from operating leases	14,789	10,003
Right-of-use assets obtained in exchange for operating lease liabilities	$ 932	$ 1,630
Weighted average remaining lease term (years) (Year)	7 years 11 months 23 days
Weighted Average discount rate	8.03%