Note 14 - Stockholders' Equity (Details) - Stock Options Outstanding (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options, outstanding (in Shares)	5,503,539	5,922,709
Weighted average remaining contractual life, outstanding	4 years 171 days
Weighted exercise price, outstanding	$ 7.83	$ 7.70
Number of options, exercisable (in Shares)	4,997,760
Weighted average exercise price per option, exercisable	$ 8.31
Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit
Exercise price, upper range limit	$ 4.23
Number of options, outstanding (in Shares)	1,698,127
Weighted average remaining contractual life, outstanding	5 years 292 days
Weighted exercise price, outstanding	$ 3.32
Number of options, exercisable (in Shares)	1,192,348
Weighted average exercise price per option, exercisable	$ 3.45
Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 4.24
Exercise price, upper range limit	$ 6.35
Number of options, outstanding (in Shares)	1,372,231
Weighted average remaining contractual life, outstanding	4 years 6 months
Weighted exercise price, outstanding	$ 5.08
Number of options, exercisable (in Shares)	1,372,231
Weighted average exercise price per option, exercisable	$ 5.08
Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 6.36
Exercise price, upper range limit	$ 8.47
Number of options, outstanding (in Shares)	614,181
Weighted average remaining contractual life, outstanding	4 years 328 days
Weighted exercise price, outstanding	$ 6.45
Number of options, exercisable (in Shares)	614,181
Weighted average exercise price per option, exercisable	$ 6.45
Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 8.48
Exercise price, upper range limit	$ 10.58
Number of options, outstanding (in Shares)	182,500
Weighted average remaining contractual life, outstanding	3 years
Weighted exercise price, outstanding	$ 10.21
Number of options, exercisable (in Shares)	182,500
Weighted average exercise price per option, exercisable	$ 10.21
Range 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price, lower range limit	$ 10.59
Exercise price, upper range limit	$ 25.53
Number of options, outstanding (in Shares)	1,636,500
Weighted average remaining contractual life, outstanding	3 years 36 days
Weighted exercise price, outstanding	$ 15.06
Number of options, exercisable (in Shares)	1,636,500
Weighted average exercise price per option, exercisable	$ 15.06