Note 13 - Stock-based Compensation (Details) - Exercise Price and Remaining Life Information about Options Exercisable (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares exercisable (in Shares)	1,435,500
Weighted average remaining contractual life	2 years 94 days
Weighted average exercise price	$ 0.46
Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 1.24
Exercise price range, upper limit	$ 1.30
Shares exercisable (in Shares)	150,000
Weighted average remaining contractual life	1 year
Weighted average exercise price	$ 1.25
Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 0.70
Exercise price range, upper limit	$ 1.23
Shares exercisable (in Shares)	27,000
Weighted average remaining contractual life	87 days
Weighted average exercise price	$ 0.74
Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 0.23
Exercise price range, upper limit	$ 0.69
Shares exercisable (in Shares)	1,258,500
Weighted average remaining contractual life	2 years 193 days
Weighted average exercise price	$ 0.36