Note 7 - Employee Benefit Plans (Detail) - Net Periodic Benefit Costs and Related Components for the SERPs (Supplemental Employee Retirement Plans, Defined Benefit [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Service cost	$ 60	$ 50	$ 120	$ 100
Interest cost	72	71	144	142
Amortization of prior service cost	57	57	114	114
Recognized net actuarial loss	34	15	68	30
Net periodic benefit cost	$ 223	$ 193	$ 446	$ 386