Note 3 - Restructuring Charges (Detail) - Restructuring Activities and Associated Costs (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012	Oct. 01, 2011
Liability	$ 162,000	$ 167,000	$ 162,000	$ 254,000
Restructuring charges	203,000	599,000	802,000
Cash payments	(208,000)	(697,000)
Non-cash charges		11,000
Employee Severance [Member]
Liability	0	0	0	65,000
Restructuring charges	0	(40,000)
Cash payments	0	(25,000)
Non-cash charges		0
Asset Impairment Charges [Member]
Liability	0	0	0	0
Restructuring charges	0	(11,000)
Cash payments	0	0
Non-cash charges		11,000
Facility Closing [Member]
Liability	0	0	0	77,000
Restructuring charges	0	139,000
Cash payments	0	(216,000)
Non-cash charges		0
Equipment Relocation Costs [Member]
Liability	162,000	167,000	162,000	112,000
Restructuring charges	203,000	511,000
Cash payments	(208,000)	(456,000)
Non-cash charges		$ 0