Note 11 - Business Segments and Significant Customers (Details) - Sales by Geographic Area (USD $) In Thousands, unless otherwise specified	12 Months Ended
	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