Note 17 - Share-Based and Other Compensation Plans (Non-Qualified Stock Options - Range of Exercise Prices) (Details) (Equity Compensation Plan, 1995 and 2008 [Member], USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number Outstanding	4,402,344
Options Exercisable, Number Exercisable	2,267,857
Share-based Compensation Arrangement by Share-based Payment Award, Options Granted in Period, Closing Price of Common Stock Vesting Criteria	4.90		4.48
Share-based Compensation Arrangement by Share-based Payment Award, Options Granted in Period, Percent of Increase Over Granted Price for Additional Vesting Criteria	200.00%		125.00%
Number of Consecutive Trading Days For Current Year Options Granted Vesting Requirement	10
Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0		0		0
Risk-free interest rate	1.66%	[1]	1.88%	[1]	2.85%	[1]
Volatility	96.97%	[2]	114.51%	[2]	110.83%	[2]
Dividend yield	0.41%		0.28%		0.10%
Minimum [Member] | Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period as Defined in Change in Control Criteria	3 years
$2.45 - $3.58 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	2.45
Range of Exercise Prices, Upper Range Limit	3.58
Options Outstanding, Number Outstanding	2,288,360
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	5 years 5 months 13 days
Options Outstanding, Weighted Average Exercise Price	2.72
Options Exercisable, Number Exercisable	444,800
Options Exercisable, Weighted Average Exercise Price	2.48
$5.76 - $7.06 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	5.76
Range of Exercise Prices, Upper Range Limit	7.06
Options Outstanding, Number Outstanding	76,827
Options Outstanding, Weighted Average Exercise Price	6.89
Options Exercisable, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	0
$10.42 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	10.42
Range of Exercise Prices, Upper Range Limit	10.42
Options Outstanding, Number Outstanding	214,100
Options Outstanding, Weighted Average Exercise Price	10.42
Options Exercisable, Number Exercisable	0
Options Exercisable, Weighted Average Exercise Price	0
$20.34 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	20.34
Range of Exercise Prices, Upper Range Limit	20.34
Options Outstanding, Number Outstanding	946,400
Options Outstanding, Weighted Average Exercise Price	20.34
Options Exercisable, Number Exercisable	946,400
Options Exercisable, Weighted Average Exercise Price	20.34
$35.79 - $53.17 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	35.79
Range of Exercise Prices, Upper Range Limit	53.17
Options Outstanding, Number Outstanding	494,580
Options Outstanding, Weighted Average Exercise Price	40.48
Options Exercisable, Number Exercisable	494,580
Options Exercisable, Weighted Average Exercise Price	40.48
$56.03 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Range Limit	56.03
Range of Exercise Prices, Upper Range Limit	56.03
Options Outstanding, Number Outstanding	382,077
Options Outstanding, Weighted Average Exercise Price	56.03
Options Exercisable, Number Exercisable	382,077
Options Exercisable, Weighted Average Exercise Price	56.03
Derived Service Period [Member] | Minimum [Member] | Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Expected life (years)	3 years 1 month 21 days	[3]
Derived Service Period [Member] | Maximum [Member] | Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Expected life (years)	4 years	[3]
Expected Life [Member] | Stock Options [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Expected life (years)			6 years	[3],[4]	6 years	[3],[4]

[1] The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant.

[2] Volatility is determined at the date of grant using historical share price volatility and expected life of each award.

[3] In 2012, we began using a Monte Carlo valuation, which assumes a derived service period of between 3.14 years and 4 years instead of an expected life assumption.

[4] In 2011 and 2010, the expected life of stock options granted was estimated to be less than the full term of the options awarded. The expected life is estimated using historical data.