Note 7 - Restructuring Charge (Detail) (USD $)	3 Months Ended			12 Months Ended
	Dec. 31, 2012	Sep. 30, 2010	Dec. 31, 2009	Dec. 31, 2012	Dec. 31, 2010
Restructuring Charges	$ 253,000	$ 3,300,000	$ 1,200,000	$ 253,000	$ 3,339,000
Restructuring and Related Cost, Incurred Cost			173,000
Employee Severance [Member]
Restructuring Charges	253,000
Restructuring Reserve, Settled with Cash	$ (91,000)		$ 1,100,000