Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted Average Assumptions, Options (Employee Stock Option [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Stock Option [Member]
Note 12 - Stock Based Compensation and Other Benefit Plans (Details) - Weighted Average Assumptions, Options [Line Items]
Risk-free interest rate	1.53%	1.02%	0.68%
Expected life of the option in years	5 years 80 days	5 years 80 days	5 years 80 days
Expected volatility	48.60%	53.70%	60.30%