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Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area [Line Items] |  |  |
Sales by geographic area | $ 379,546 | $ 322,489 | $ 470,495
UNITED STATES |  |  |
Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area [Line Items] |  |  |
Sales by geographic area | 22,361 | 25,438 | 24,409
CANADA |  |  |
Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area [Line Items] |  |  |
Sales by geographic area | 170,632 | 34,441 | 240,569
JAPAN |  |  |
Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area [Line Items] |  |  |
Sales by geographic area | 50,039 | 70,371 | 60,963
KOREA, REPUBLIC OF |  |  |
Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area [Line Items] |  |  |
Sales by geographic area | 86,035 | 120,106 | 92,919
CHINA |  |  |
Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area [Line Items] |  |  |
Sales by geographic area | $ 50,479 | $ 72,133 | $ 51,635

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