Note 10 - Warranty Costs (Details) - Changes In Warranty Accrual (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Changes In Warranty Accrual [Abstract]
Warranty accrual, beginning of the period	$ 13,811	$ 15,514
Warranty costs accrued during the period	4,950	1,789
Warranty costs paid during the period	(5,615)	(2,844)
Warranty accrual, end of the period	$ 13,146	$ 14,459