Note 8 - Restructuring (Detail) (USD $)	45 Months Ended								45 Months Ended		3 Months Ended	45 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Jun. 30, 2012 Restructuring Reserve [Member]	Dec. 31, 2011 Restructuring Reserve [Member]	Jun. 30, 2012 Employee Severance [Member]	Dec. 31, 2011 Employee Severance [Member]	Jun. 30, 2012 Facility Closing [Member]	Jun. 30, 2012 Facility Closing [Member]	Dec. 31, 2011 Facility Closing [Member]
Restructuring and Related Cost, Cost Incurred to Date	$ 7,800,000								$ 4,800,000			$ 2,700,000
Restructuring and Related Cost, Incurred Cost											100,000
Restructuring Reserve	697,000	622,000	728,000	943,000	1,219,000	1,379,000	700,000	700,000	100,000	100,000	600,000	600,000	600,000
Accrued Liabilities, Current	2,587,000		2,335,000				600,000	500,000
Other Liabilities, Noncurrent	$ 315,000		$ 667,000				$ 100,000	$ 200,000