Note 7 - Guarantees (Details) (USD $)	9 Months Ended					6 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Amended EBP Settlement Agreement [Member]	May 20, 2014 Amended EBP Settlement Agreement [Member]	Sep. 30, 2014 Financial Guarantee [Member] Guarantor Subsidiaries [Member]	Sep. 30, 2014 Financial Guarantee [Member]	Jun. 30, 2014 Maximum [Member]	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 Minimum [Member]
Note 7 - Guarantees (Details) [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted				$ 55,000,000	$ 6,000,000
Guarantee Term for Product and Short-term Equipment Leasing Arrangements	90 days
Guarantee Term for Long-term Equipment Leasing Arrangements	5 years
Guarantor Obligations, Current Carrying Value				21,000,000
Environmental Settlement, Historical Liabilities Trigger Amount		99,000,000	99,000,000
Percentage of Liability Above $99 Million		50.00%	50.00%
Accrual for Environmental Loss Contingencies		$ 0
Orginal Warranty Period							1 year
Extended Warranty Period	1 year					5 years		3 months