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Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 30, 2017	Jun. 30, 2018	Jul. 01, 2017	Sep. 29, 2018	Sep. 30, 2017
Effective Income Tax Rate Reconciliation, Percent, Total		12.00%	33.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%			35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 3,700,000
Deferred Tax Liabilities, Net, Noncurrent		$ 5,782,000			$ 8,103,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local		7,400,000
Deferred Tax Assets, Valuation Allowance, Total		254,000			$ 251,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Tax Credit Carryforwards, Total		$ 72,000
State and Local Jurisdiction [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards Expiration Date 1		2018
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				24.50%

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