Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Sep. 28, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	22.70%	23.50%
Deferred Tax Liabilities, Net, Noncurrent	$ 7,086,000		$ 6,900,000
Deferred Tax Assets, Tax Credit Carryforwards, Total	8,000
Deferred Tax Assets, Valuation Allowance, Total	265,000		$ 257,000
Other Current Assets [Member]
Unrecognized Tax Benefits, Ending Balance	122,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 3,500,000
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	2032