Note 15 - Employee Benefits and Incentive Plans (Details Textual) - USD ($)	12 Months Ended
Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 205,000	$ 188,000	$ 184,000

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration