Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Dec. 29, 2018	Mar. 30, 2019	Mar. 31, 2018	Sep. 28, 2019	Sep. 29, 2018
Effective Income Tax Rate Reconciliation, Percent, Total		23.90%	(1.90%)
Tax Cuts and Jobs Act of 2017, Change in Tax Rate Deferred Tax Liability Income Tax Benefit	$ 3,700,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					24.50%
Deferred Tax Liabilities, Net, Noncurrent		$ 7,476,000			$ 5,340,000
Deferred Tax Assets, Tax Credit Carryforwards, Total		16,000
Deferred Tax Assets, Valuation Allowance, Total		265,000			$ 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%