Note 8 - Income Taxes (Details Textual) - USD ($)	6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Sep. 28, 2019
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.40%	23.90%
Deferred Income Tax Liabilities, Net, Total	$ 7,505,000		$ 6,900,000
Deferred Tax Assets, Tax Credit Carryforwards, Total	8,000
Deferred Tax Assets, Valuation Allowance, Total	199,000		$ 257,000
Other Current Assets [Member]
Unrecognized Tax Benefits, Ending Balance	78,000
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	2032