Note 2 - Long-Term Incentive Plans (Details) - Stock Option Activity	6 Months Ended
	Jun. 30, 2013
Stock Option Activity [Abstract]
Outstanding at January 1, 2013	4,294,273
Outstanding at June 30, 2013	4,188,927
Granted	60,000
Exercised	(52,428)
Forfeited and cancelled	(112,918)