Note 6 - Stock-Based Compensation (Details) - Changes in the Number and Weighted-Average Grant-Date Fair Value (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Changes in the Number and Weighted-Average Grant-Date Fair Value [Abstract]
Non-Vested Stock Option Awards	4,385	4,209
Weighted Average Grant-Date Fair Value	$ 4.27	$ 1.50
Stock option awards granted	1,965
Stock option awards granted	$ 7.76
Stock option awards vested	(1,789)
Stock option awards vested	$ 1.59