Note 12 - Stock-Based Compensation and Other Benefit Plans (Details) - Stock Options Activity (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options Activity [Abstract]
Outstanding at beginning of period	4,480,026
Outstanding at beginning of period (in Dollars per share)	$ 6.13
Outstanding at end of period	3,449,367	4,480,026
Outstanding at end of period (in Dollars per share)	$ 6.94	$ 6.13
Outstanding at end of period	6 years 354 days
Outstanding at end of period (in Dollars)	$ 18,455,618
Vested or expected to vest at end of period	3,386,579
Vested or expected to vest at end of period (in Dollars per share)	$ 6.91
Vested or expected to vest at end of period	6 years 343 days
Vested or expected to vest at end of period (in Dollars)	18,236,435
Options exercisable at end of period	1,898,195
Options exercisable at end of period (in Dollars per share)	$ 6.23
Options exercisable at end of period	5 years 240 days
Options exercisable at end of period (in Dollars)	$ 11,502,128
Granted	497,658
Granted (in Dollars per share)	$ 11.43	$ 5.57	$ 9.13
Exercised	(1,386,431)
Exercised (in Dollars per share)	$ 6.01
Expired or cancelled	(141,886)
Expired or cancelled (in Dollars per share)	$ 6.33