Note 2 - Summary of Significant Accounting Policies (Details) - Warranty Costs Accrual (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Warranty Costs Accrual [Abstract]
Warranty accrual balance	$ 15,514	$ 17,572	$ 20,866
Warranty costs accrued during the year	2,495	1,497	2,794
Warranty costs paid during the year	(4,198)	(3,555)	(3,188)
Adjustments to warranty accrual during the year			(2,900)
Warranty accrual balance	$ 13,811	$ 15,514	$ 17,572