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Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Sep. 28, 2019	Sep. 29, 2018
Effective Income Tax Rate Reconciliation, Percent, Total	23.50%	(36.80%)
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 3,700,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				24.50%
Deferred Tax Liabilities, Net, Noncurrent	7,471,000			$ 5,340,000
Deferred Tax Assets, Tax Credit Carryforwards, Total	16,000
Deferred Tax Assets, Valuation Allowance, Total	266,000			$ 233,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 2,100,000
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1	2022
Tax Credit Carryforward, Expiration Date 1	2019
State and Local Jurisdiction [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1	2031
Tax Credit Carryforward, Expiration Date 1	2020
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%

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