Note 8 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 02, 2016	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015
Pension Plan [Member]
Interest cost	$ 37	$ 33	$ 74	$ 66
Expected return on plan assets	(44)	(45)	(88)	(90)
Recognized net actuarial loss	19	13	38	26
Net periodic pension cost	12	1	24	2
Supplemental Employee Retirement Plan [Member]
Interest cost	81	81	162	162
Recognized net actuarial loss	21	29	42	58
Net periodic pension cost	168	182	336	364
Service cost	$ 66	$ 72	$ 132	$ 144