Note 3 - Restructuring Plan Announced March 18, 2013 (Detail) (USD $)	3 Months Ended	6 Months Ended		0 Months Ended		3 Months Ended		0 Months Ended		3 Months Ended		0 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Mar. 18, 2013	Mar. 18, 2013 Minimum [Member] Other Restructuring [Member]	Mar. 18, 2013 Minimum [Member]	Jun. 30, 2013 Minimum [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 18, 2013 Maximum [Member] Other Restructuring [Member]	Mar. 18, 2013 Maximum [Member]	Jun. 30, 2013 Maximum [Member]	Mar. 31, 2013 Maximum [Member]	Mar. 18, 2013 Non-Cash Inventory Impairment Charge [Member]	Mar. 18, 2013 Employee Severance [Member]
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent			32.00%
Restructuring and Related Cost, Incurred Cost					$ 11,300,000				$ 13,400,000
Inventory Write-down	6,694,000	6,694,000										6,700,000
Restructuring Costs and Asset Impairment Charges													600,000
Other Restructuring Costs					2.0				2,600,000
Impairment of Intangible Assets, Finite-lived				2,000,000				3,500,000
Effect on Future Cash Flows, Amount						500,000	4,100,000			700,000	6,000,000
Restructuring and Related Cost, Expected Cost						$ 2,700,000				$ 2,500,000