Note 12 - Warrany Costs - Warranty Costs Accrual (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Warranty accrual	$ 40,691	$ 13,584
Warranty costs accrued during the period	16,903	7,403
Warranty costs paid during the period	(15,088)	(7,119)
Warranty accrual	$ 42,506	$ 13,868