Note 11 - Product Warranty Obligations - Deferred Product Obligations (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current portion - other accrued liabilities	$ 59,052	$ 37,417
Long-term portion - other long-term liabilities	35,161	21,801
Total	94,213	59,218	$ 49,316	$ 41,785
Current portion - other accrued liabilities	20,556	18,857
Long-term portion - other long-term liabilities	91,091	70,931
Total	$ 111,647	$ 89,788	$ 78,738	$ 68,340