Note 9 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		24.50%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 3,300,000
Deferred Tax Liabilities, Net, Noncurrent		5,340,000	$ 8,103,000
Deferred Tax Assets, Tax Credit Carryforwards, Total		16,000
Deferred Tax Assets, Valuation Allowance, Total		233,000	251,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		(18,000)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total		$ 0	0	$ 0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total			$ 6,600,000
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1		2019
Tax Credit Carryforward, Expiration Date 1		2019
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1		2032
Tax Credit Carryforward, Expiration Date 1		2020
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%