Note 10 - Warranty Costs (Details) - Changes In Warranty Accrual (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Changes In Warranty Accrual [Abstract]
Warranty accrual, beginning of the period	$ 13,811	$ 15,514
Warranty costs accrued during the period	2,812	1,182
Warranty costs paid during the period	(3,277)	(1,772)
Warranty accrual, end of the period	$ 13,346	$ 14,924