Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Sep. 30, 2017
Effective Income Tax Rate Reconciliation, Percent	(36.80%)	33.70%
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	6,034,000		$ 8,103,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	7,400,000
Deferred Tax Assets, Valuation Allowance	254,000		$ 251,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Tax Credit Carryforwards	$ 71,000
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	2031
Tax Credit Carryforward, Expiration Date 1	2020