Note 14 - Valuation and Qualifying Accounts Valuation Allowance for doubtful accounts and notes receivable (Details) (Allowance for Doubtful Accounts [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance - Begin	$ 1.5	$ 1.3	$ 0.5
Valuation Allowances and Reserves, Charged to Cost and Expense	1.4	0.4	0.9
Valuation Allowances and Reserves, Deductions	(0.3)	(0.2)	(0.1)
Valuation Allowances and Reserves, Balance - End	$ 2.6	$ 1.5	$ 1.3