Note 14 - Stock-Based Compensation (Details) - Compensation Related to Stock-Based Awards (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 6,264	$ 6,378	$ 6,672
Tax effect on stock-based compensation expense	783	797	834
Net effect of stock-based compensation expense	5,481	5,581	5,838
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,971	4,225	4,325
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	494	542	600
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,799	$ 1,611	$ 1,747