Note 8 - Employee Benefit Plans (Details Textual)	3 Months Ended	9 Months Ended
	Jul. 02, 2016 USD ($)	Jul. 02, 2016 USD ($)
Reduced SERP [Member] | Minimum [Member]
Defined Benefit Plan Employment Term		10 years
Reduced SERP [Member]
Defined Benefit Plan Retirement Age		55
Defined Benefit Plan, Reduction for Each Month	0.00278%	0.00278%
Delaware Plan [Member]
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 1,900,000
Defined Benefit Plan, Contributions by Employer	$ 70,000	$ 155,000
Supplemental Employee Retirement Plan [Member] | Minimum [Member]
Defined Benefit Plan Employment Term		30 years
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plan Retirement Age		65
Supplemental Retirement Benefit Period		15 years
Defined Benefit Plan Percent of Highest Average Salary Base		50.00%
Defined Benefit Plan Number of Years in Average Annual Base Salary		5 years
Defined Benefit Plan Number of Years Preceding Retirement for Average Annual Base Salary Calculation		10 years