Note 10 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	24.50%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 3,300,000
Deferred Tax Liabilities, Net, Noncurrent	$ 6,900,000	5,340,000
Deferred Tax Assets, Tax Credit Carryforwards, Total	8,000
Deferred Tax Assets, Valuation Allowance, Total	257,000	233,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	24,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	$ 0	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	1,700,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 2,200,000
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1	2022
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1	2034
Tax Credit Carryforward, Expiration Date 1	2020