Note 4 - Restructuring Charges and Acquisition Costs (Detail) - Summaries of the Restructuring Activities and Associated Costs Incurred (USD $)	3 Months Ended						9 Months Ended		24 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Jun. 30, 2012	Jul. 02, 2011	Oct. 01, 2011	Oct. 02, 2010
2012
Liability	$ 0	$ 162,000	$ 167,000	$ 556,000	$ 758,000	$ 1,127,000	$ 0	$ 556,000	$ 254,000	$ 0
Restructuring charges	30,000	203,000	599,000	1,970,000	2,213,000	4,390,000	832,000	8,573,000	306,000
Cash payments	(192,000)	(208,000)	(697,000)	(1,489,000)	(1,998,000)	(395,000)
Non-cash charges			11,000	(683,000)	(584,000)	(2,868,000)
Employee Severance [Member]
2012
Liability	0			325,000	359,000	669,000	0	325,000	65,000	0
Restructuring charges			(40,000)	118,000	1,176,000	979,000
Cash payments			(25,000)	(152,000)	(1,486,000)	(310,000)
Asset Impairment Charges [Member]
2012
Liability	0						0			0
Restructuring charges			(11,000)	683,000	584,000	2,868,000
Non-cash charges			11,000	(683,000)	(584,000)	(2,868,000)
Facility Closing [Member]
2012
Liability	0			172,000	315,000	458,000	0	172,000	77,000	0
Restructuring charges			139,000	615,000	224,000	533,000
Cash payments			(216,000)	(758,000)	(367,000)	(75,000)
Equipment Relocation Costs [Member]
2012
Liability	0	162,000	167,000	59,000	84,000		0	59,000	112,000	0
Restructuring charges	30,000	203,000	511,000	554,000	229,000	10,000
Cash payments	$ (192,000)	$ (208,000)	$ (456,000)	$ (579,000)	$ (145,000)	$ (10,000)